[ { "key": "5V8UGZWN", "version": 4247, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/5V8UGZWN", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/5V8UGZWN", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "lastModifiedByUser": { "id": 1221415, "username": "CedocIGD", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigd", "type": "text/html" } } }, "creatorSummary": "Müller et al.", "numChildren": 0 }, "data": { "key": "5V8UGZWN", "version": 4247, "itemType": "journalArticle", "title": "Sediment storage and transfer on a periglacial mountain slope (Corvatsch, Switzerland)", "creators": [ { "creatorType": "author", "firstName": "Johann", "lastName": "Müller" }, { "creatorType": "author", "firstName": "Isabelle", "lastName": "Gärtner-Roer" }, { "creatorType": "author", "firstName": "Robert", "lastName": "Kenner" }, { "creatorType": "author", "firstName": "Patrick", "lastName": "Thee" }, { "creatorType": "author", "firstName": "David", "lastName": "Morche" } ], "abstractNote": "Abstract\nHigh mountain geomorphology is mostly characterized by high elevation, steep gradients, rocky terrain, the presence of snow and ice and the related processes occurring in a high energy environment. Large sources of sediment and sediment storages often exist within high mountain systems and are controlled by the processes occurring within this setting. The purpose of this study is to describe sediment paths on a periglacial mountain slope and quantify geomorphic work within one example year in order to analyze and compare sediment budgets in high mountain geosystems. This energy-related approach helps to characterize a periglacial slope on account of the effectiveness of its geomorphological processes and might help to understand the complex dynamic behavior of its constituent subsystems.\n\nA periglacial mountain slope is investigated in Eastern Switzerland (Corvatsch). The environment is characterized by a typical coarse debris cascade: rock wall → rock fall → talus slope → permafrost creep → rockglacier. Rockglaciers are considered to be sediment traps of the coarse debris system, reflecting the erosion history of the corresponding catchment. Headwall recession and creep processes of the talus slopes and rockglaciers are quantified by a multi-method-approach combining remote sensing and terrestrial methods. Multitemporal DEMs of the last two decades enabled the quantification of sediment transfer of the slow moving landforms (frozen talus slopes and rockglaciers). Sediment input from the rock wall is quantified by repeated laser scanning over the last 4 years. With the introduced cascading approach it is possible to assess dynamics within the coarse debris system. The mountain slope is divided into three subsystems (headwall, talus cone and rockglacier) and their dynamics are analyzed individually but also in relation to the entire mountain slope on a yearly base. A backweathering rate of 2 mm can be derived for the headwall and an energy transfer of 29.8 GJ from the headwall to the slope, 4 GJ from the talus slope to rockglacier where 1.44 GJ of geomorphic work are released by the downwards creep of the landform. This study is the first to include an analysis of the geomorphic work generated on the basis of vertically differentiated sediment production and transport processes.", "publicationTitle": "Geomorphology", "publisher": "", "place": "", "date": "", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Geomorphology", "DOI": "10.1016/j.geomorph.2013.12.002", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0169555X13005953", "accessDate": "2014-01-10T11:07:35Z", "PMID": "", "PMCID": "", "ISSN": "0169-555X", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Geomorphic Work", "type": 1 }, { "tag": "High mountain", "type": 1 }, { "tag": "Periglacial", "type": 1 }, { "tag": "Sediment transfer", "type": 1 }, { "tag": "rockglacier", "type": 1 }, { "tag": "terrestrial laser scanning", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": { "dc:replaces": "http://zotero.org/groups/4428/items/PVXWGXZD" }, "dateAdded": "2014-01-10T11:07:35Z", "dateModified": "2023-07-21T09:31:15Z" } }, { "key": "3447KI4T", "version": 4238, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/3447KI4T", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/3447KI4T", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "lastModifiedByUser": { "id": 1221415, "username": "CedocIGD", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigd", "type": "text/html" } } }, "creatorSummary": "Gruber", "parsedDate": "2009", "numChildren": 0 }, "data": { "key": "3447KI4T", "version": 4238, "itemType": "bookSection", "title": "Evolution géomorphologique de la haute montagne alpine dans le contexte actuel de réchauffement climatique", "creators": [ { "creatorType": "author", "firstName": "Stephan", "lastName": "Gruber" }, { "creatorType": "editor", "firstName": "Philip", "lastName": "Deline" }, { "creatorType": "editor", "firstName": "Ludovic", "lastName": "Ravanel" } ], "abstractNote": "En haute montagne, les processus glaciaires et périglaciaires exercent un très fort contrôle sur la morphodynamique des versants. Cet article identifie ces principaux processus géomorphologiques et leurs aléas associés. Dans le cas des glaciers, ces aléas résul- tent de la formation des lacs et des poches d’eau glaciaires, des avalanches de glace et glissement de glaciers, de l’évolution des moraines latérales et de la décompression post-glaciaire des versants rocheux. En domaine périglaciaire, les risques proviennent essentiellement de la déstabilisation des parois rocheuses et des formations superficielles. Du fait de leur proximité avec les condi- tions de fusion, les glaciers et le permafrost alpins vont probablement réagir de manière exacerbée à la poursuite du réchauffement climatique. En modifiant profondément la dynamique des glaciers et en dégradant durablement le permafrost présent dans les parois rocheuses et les formations superficielles, ce réchauffement, trois fois plus important dans les Alpes qu’à l’échelle du globe au cours des deux dernières décennies, pourrait être à l’origine de risques accrus.", "bookTitle": "Neige et glace de montagne : reconstitution, dynamique, pratiques", "series": "Collection EDYTEM - n° 8 - 2009 - Cahiers de Géographie", "seriesNumber": "", "volume": "", "numberOfVolumes": "", "edition": "", "date": "2009", "publisher": "Université de Savoie, laboratoire EDYTEM", "place": "Le Bourget-du-Lac", "originalDate": "", "originalPublisher": "", "originalPlace": "", "format": "", "pages": "113-124", "ISBN": "978-2-918435-00-6", "DOI": "", "citationKey": "", "url": "http://hal-sde.archives-ouvertes.fr/docs/00/39/42/90/PDF/Coll_EDYTEM_8_Neige_et_Glace_de_Montagne.pdf", "accessDate": "2010-02-22", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "haute montagne alpine ; glaciers ; permafrost ; processus géomorphologiques ; réchauffement climatique ; risque naturels" } ], "collections": [ "NTF93FJ4" ], "relations": { "dc:replaces": "http://zotero.org/groups/4428/items/HCG7TQQ4" }, "dateAdded": "2010-02-22T13:51:08Z", "dateModified": "2023-07-21T09:30:22Z" } }, { "key": "KJIR3WTC", "version": 4228, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/KJIR3WTC", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/KJIR3WTC", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "lastModifiedByUser": { "id": 1221415, "username": "CedocIGD", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigd", "type": "text/html" } } }, "creatorSummary": "Gruber et al.", "parsedDate": "2012-05-09", "numChildren": 0 }, "data": { "key": "KJIR3WTC", "version": 4228, "itemType": "journalArticle", "title": "Preface: The Mountain Cryosphere – a Holistic View on Processes and Their Interactions", "creators": [ { "creatorType": "author", "firstName": "Stephan", "lastName": "Gruber" }, { "creatorType": "author", "firstName": "Markus", "lastName": "Egli" }, { "creatorType": "author", "firstName": "Isabelle", "lastName": "Gärtner‐Roer" }, { "creatorType": "author", "firstName": "Martin", "lastName": "Hoelzle" } ], "abstractNote": "Gruber, S., Egli, M., Gärtner-Roer, I. and Hoelzle, M., 2012. Preface: The mountain cryosphere – a holistic view on processes and their interactions. Geografiska Annaler: Series A, Physical Geography, ••, ••–••. doi:10.1111/j.1468-0459.2012.00468.x", "publicationTitle": "Geografiska Annaler: Series A, Physical Geography", "publisher": "", "place": "", "date": "2012/05/09", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1111/j.1468-0459.2012.00468.x", "citationKey": "", "url": "http://onlinelibrary.wiley.com/doi/10.1111/j.1468-0459.2012.00468.x/full", "accessDate": "2012-05-15T12:42:17Z", "PMID": "", "PMCID": "", "ISSN": "1468-0459", "archive": "", "archiveLocation": "", "shortTitle": "PREFACE", "language": "en", "libraryCatalog": "onlinelibrary.wiley.com", "callNumber": "", "rights": "© The authors 2012. Geografiska Annaler: Series A, Physical Geography © 2012 Swedish Society for Anthropology and Geography", "extra": "", "tags": [], "collections": [ "626R9FT4", "NTF93FJ4" ], "relations": { "owl:sameAs": "http://zotero.org/groups/111191/items/N9ETIGSI", "dc:replaces": "http://zotero.org/groups/4428/items/FNN6XTGV" }, "dateAdded": "2012-05-15T12:42:17Z", "dateModified": "2023-07-21T09:29:05Z" } }, { "key": "BQT3IKZI", "version": 3532, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/BQT3IKZI", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/BQT3IKZI", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "CedocIGD", "numChildren": 0 }, "data": { "key": "BQT3IKZI", "version": 3532, "itemType": "document", "title": "Changement de nos orientations de recherche -> la collection «Pergélisol» reste accessible mais ne sera plus alimentée", "creators": [ { "creatorType": "author", "firstName": "", "lastName": "CedocIGD" } ], "abstractNote": "", "type": "", "date": "", "publisher": "", "place": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-07-18T13:00:07Z", "dateModified": "2014-07-18T13:02:43Z" } }, { "key": "B3HA8J35", "version": 3530, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/B3HA8J35", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/B3HA8J35", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Manasypov et al.", "parsedDate": "2014", "numChildren": 0 }, "data": { "key": "B3HA8J35", "version": 3530, "itemType": "journalArticle", "title": "Thermokarst lake waters across the permafrost zones of western Siberia", "creators": [ { "creatorType": "author", "firstName": "R. M.", "lastName": "Manasypov" }, { "creatorType": "author", "firstName": "O. S.", "lastName": "Pokrovsky" }, { "creatorType": "author", "firstName": "S. N.", "lastName": "Kirpotin" }, { "creatorType": "author", "firstName": "L. S.", "lastName": "Shirokova" } ], "abstractNote": "This work describes the hydrochemical composition of thermokarst lake and pond ecosystems, which are observed in various sizes with different degrees of permafrost influence and are located in the northern part of western Siberia within the continuous and discontinuous permafrost zones. We analysed the elemental chemical composition of the lake waters relative to their surface areas (from 10 to 106 m2) and described the elemental composition of the thermokarst water body ecosystems in detail. We revealed significant correlations between the Fe, Al, dissolved organic carbon (DOC) and various chemical elements across a latitude gradient covering approximately 900 km. Several groups of chemical elements that reflect the evolution of the studied water bodies were distinguished. Combining the data for the studied latitude profile with the information available in the current literature demonstrated that the average dissolved elemental concentrations in lakes with different areas depend specifically on the latitudinal position, which is presumably linked to (1) the elements leached from frozen peat, which is the main source of the solutes in thermokarst lakes, (2) marine atmospheric aerosol depositions, particularly near the sea border and (3) short-range industrial pollution by certain metals from the largest Russian Arctic smelter. We discuss the evolution of the chemical compositions observed in thermokarst lakes during their formation and drainage and predict the effect that changing the permafrost regime in western Siberia has on the hydrochemistry of the lakes.", "publicationTitle": "The Cryosphere", "publisher": "", "place": "", "date": "juillet 11, 2014", "volume": "8", "issue": "4", "section": "", "partNumber": "", "partTitle": "", "pages": "1177-1193", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "The Cryosphere", "DOI": "10.5194/tc-8-1177-2014", "citationKey": "", "url": "http://www.the-cryosphere.net/8/1177/2014/", "accessDate": "2014-07-18T09:02:37Z", "PMID": "", "PMCID": "", "ISSN": "1994-0424", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Copernicus Online Journals", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-07-18T09:02:37Z", "dateModified": "2014-07-18T09:02:37Z" } }, { "key": "MZ7GCJI9", "version": 3529, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/MZ7GCJI9", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/MZ7GCJI9", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Coulon", "parsedDate": "2014-07-15", "numChildren": 0 }, "data": { "key": "MZ7GCJI9", "version": 3529, "itemType": "newspaperArticle", "title": "Les rochers vivants du Parc national suisse", "creators": [ { "creatorType": "author", "firstName": "Aurélie", "lastName": "Coulon" } ], "abstractNote": "Depuis la formation des roches jusqu’au déshabillage des sommets par l’érosion, les montagnes bougent. Le Parc national suisse renferme des merveilles géologiques, témoins de ces phénomènes", "publicationTitle": "Le Temps (Genève-Suisse)", "publisher": "", "place": "", "date": "15.07.2014", "volume": "", "issue": "", "edition": "", "section": "", "pages": "", "ISSN": "", "DOI": "", "citationKey": "", "url": "http://www.letemps.ch/Page/Uuid/c638e5c0-0b7d-11e4-8015-d2f7a06c82fb/Les_rochers_vivants_du_Parc_national_suisse", "accessDate": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "Paru sous le titre «Des million d'années de pierres qui roulent» dans l'édition imprimée (p.20)", "tags": [], "collections": [ "626R9FT4", "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-07-15T13:03:21Z", "dateModified": "2014-07-15T13:05:39Z" } }, { "key": "KZARUKPA", "version": 3520, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/KZARUKPA", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/KZARUKPA", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Scapozza et al.", "parsedDate": "2014", "numChildren": 0 }, "data": { "key": "KZARUKPA", "version": 3520, "itemType": "journalArticle", "title": "Assessing the rock glacier kinematics on three different timescales: a case study from the southern Swiss Alps", "creators": [ { "creatorType": "author", "firstName": "Cristian", "lastName": "Scapozza" }, { "creatorType": "author", "firstName": "Christophe", "lastName": "Lambiel" }, { "creatorType": "author", "firstName": "Claudio", "lastName": "Bozzini" }, { "creatorType": "author", "firstName": "Stefano", "lastName": "Mari" }, { "creatorType": "author", "firstName": "Marco", "lastName": "Conedera" } ], "abstractNote": "Surface temperature increases since the 1990s have often been associated with an increase in the speed of rock glaciers. Evidence of similar links on the centennial to millennial scale are, however, still lacking due to less focus to date on the medium- and long-term kinematics of these landforms. In order to assess (palaeo)climatic variations in rock glacier kinematics, we analysed the movements of the Stabbio di Largario rock glacier in the southern Swiss Alps using three different timescales. The Schmidt hammer exposure-age dating (SHD) was applied to study long-term kinematics in order to extrapolate the minimal age of the formation of the rock glacier, which may have started its development after the Mid-Holocene climate optimum, and to detect possible accelerations of the horizontal surface velocity during the Medieval Warm Period. Georeferentiation and orthorectification of six historical photographs of the rock glacier taken between ad 1910 and today were analysed using monoplotting to detect the rock glacier displacement on the decennial scale from the end of the Little Ice Age. Finally, differential global positioning system (dGPS) monitoring data available since ad 2009 were used to assess annual and seasonal creep rates of the rock glacier at present. Our results show a link between the periods of increase in mean air temperature on different timescales and variations in rock glacier kinematics and provide important new insights into rock glacier development and evolution on the long-term scale. Copyright © 2014 John Wiley & Sons, Ltd.", "publicationTitle": "Earth Surface Processes and Landforms", "publisher": "", "place": "", "date": "juin 1, 2014", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "n/a-n/a", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Earth Surf. Process. Landforms", "DOI": "10.1002/esp.3599", "citationKey": "", "url": "http://onlinelibrary.wiley.com/doi/10.1002/esp.3599/abstract", "accessDate": "2014-06-30T18:34:51Z", "PMID": "", "PMCID": "", "ISSN": "1096-9837", "archive": "", "archiveLocation": "", "shortTitle": "Assessing the rock glacier kinematics on three different timescales", "language": "en", "libraryCatalog": "Wiley Online Library", "callNumber": "", "rights": "Copyright © 2014 John Wiley & Sons, Ltd.", "extra": "", "tags": [ { "tag": "Permafrost", "type": 1 }, { "tag": "Rock Glacier", "type": 1 }, { "tag": "Schmidt hammer exposure-age dating (SHD)", "type": 1 }, { "tag": "dGPS", "type": 1 }, { "tag": "monophotogrammetry", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-06-30T18:34:51Z", "dateModified": "2014-06-30T18:34:51Z" } }, { "key": "HGXJ3XA4", "version": 3519, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/HGXJ3XA4", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/HGXJ3XA4", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Sobota and Nowak", "parsedDate": "2014", "numChildren": 0 }, "data": { "key": "HGXJ3XA4", "version": 3519, "itemType": "journalArticle", "title": "Changes in The Dynamics And Thermal Regime of The Permafrost and Active Layer of The High Arctic Coastal Area in North-West Spitsbergen, Svalbard", "creators": [ { "creatorType": "author", "firstName": "Ireneusz", "lastName": "Sobota" }, { "creatorType": "author", "firstName": "Marcin", "lastName": "Nowak" } ], "abstractNote": "In this paper changes in the active layer of the high arctic coastal area in north-west Spitsbergen, Svalbard are described. Analysis includes both the ground thawing depth and its near-surface thermal structure. The study was conducted on the Kaffiøyra Plain (Svalbard) at several fixed sites, which represent places typical of the region: a sandy beach, a tundra plain and a moraine ridge. The results show that in recent years, at two measurement points a significantly deeper thawing was observed. In 1996–2012 on the beach and on the moraine the trend of active layer thickness change was +1.3 cm yr−1 and +2.5 cm yr−1, respectively. Generally, in the years 2008–2012 the mean thickness of the active layer in the Kaffiøyra region increased by 3% to 6%. Even at the spatially close sites, within similar environments, there are significant differences in the thickness of the active layer. Measurements show that significant changes also occurred in the thawed ground temperature. Mean values of the observed near-surface temperature in recent years (2007–2011) were higher by more than 1.0°C, in comparison to the mean in the late 1970s.", "publicationTitle": "Geografiska Annaler: Series A, Physical Geography", "publisher": "", "place": "", "date": "juin 1, 2014", "volume": "96", "issue": "2", "section": "", "partNumber": "", "partTitle": "", "pages": "227-240", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Geografiska Annaler: Series A, Physical Geography", "DOI": "10.1111/geoa.12045", "citationKey": "", "url": "http://onlinelibrary.wiley.com/doi/10.1111/geoa.12045/abstract", "accessDate": "2014-06-30T12:50:51Z", "PMID": "", "PMCID": "", "ISSN": "1468-0459", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "Wiley Online Library", "callNumber": "", "rights": "© 2014 Swedish Society for Anthropology and Geography", "extra": "", "tags": [ { "tag": "Permafrost", "type": 1 }, { "tag": "Svalbard", "type": 1 }, { "tag": "active layer thermal regime", "type": 1 }, { "tag": "active layer thickness", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-06-30T12:50:51Z", "dateModified": "2014-06-30T12:50:51Z" } }, { "key": "3C2T7XMK", "version": 3511, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/3C2T7XMK", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/3C2T7XMK", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Barboux et al.", "parsedDate": "2014", "numChildren": 0 }, "data": { "key": "3C2T7XMK", "version": 3511, "itemType": "journalArticle", "title": "Inventorying of slope movements in Alpine environment using DInSAR", "creators": [ { "creatorType": "author", "firstName": "Chloé", "lastName": "Barboux" }, { "creatorType": "author", "firstName": "Reynald", "lastName": "Delaloye" }, { "creatorType": "author", "firstName": "Christophe", "lastName": "Lambiel" }, { "creatorType": "author", "firstName": "Fiona", "lastName": "Kirkby" } ], "abstractNote": "Differential SAR Interferometry (DInSAR) is a technique that can be used to detect and characterize slope movements. It is investigated here as a tool for establishing a detailed overview about complex slope movements at a regional scale in an Alpine context. This paper gives specific recommendations to use and to understand DInSAR signals in mountainous areas located above the tree line, excluding glaciated areas. It proposes a systematic procedure based on accurate interpretations of interferometric signals from a large DInSAR dataset to locate and estimate the displacement rate of moving zones. The methodology was successfully applied in the Western Swiss Alps, where about 1500 moving objects were detected above the tree line using a large dataset of ERS and JERS interferograms dating from the 1990s. The DInSAR-detected movements had a displacement rate ranging from a few centimeters to several meters per year and were attributed to various types of mass wasting phenomena (rock glaciers, landslides, etc.). This kind of inventory derived from DInSAR can be used as a preliminary tool for natural hazard management and process understanding in mountain areas. As automatic data archiving and systematic acquisition of SAR data are ensured worldwide for most SAR sensors, a similar methodology can basically be applied in many other parts of the globe - also by using data from current SAR sensors – as long as a high resolution DEM is available. This article is protected by copyright. All rights reserved.", "publicationTitle": "Earth Surface Processes and Landforms", "publisher": "", "place": "", "date": "mai 1, 2014", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "n/a-n/a", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Earth Surf. Process. Landforms", "DOI": "10.1002/esp.3603", "citationKey": "", "url": "http://onlinelibrary.wiley.com/doi/10.1002/esp.3603/abstract", "accessDate": "2014-05-27T14:39:35Z", "PMID": "", "PMCID": "", "ISSN": "1096-9837", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "Wiley Online Library", "callNumber": "", "rights": "This article is protected by copyright. All rights reserved.", "extra": "", "tags": [ { "tag": "DInSAR", "type": 1 }, { "tag": "Rock Glacier", "type": 1 }, { "tag": "inventory", "type": 1 }, { "tag": "landslide", "type": 1 }, { "tag": "slope movement", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-05-27T14:39:35Z", "dateModified": "2014-05-27T14:39:35Z" } }, { "key": "AMSGNRH7", "version": 3505, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/AMSGNRH7", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/AMSGNRH7", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Guglielmin et al.", "numChildren": 0 }, "data": { "key": "AMSGNRH7", "version": 3505, "itemType": "journalArticle", "title": "Permafrost and snow monitoring at Rothera Point (Adelaide Island, Maritime Antarctica): Implications for rock weathering in cryotic conditions", "creators": [ { "creatorType": "author", "firstName": "Mauro", "lastName": "Guglielmin" }, { "creatorType": "author", "firstName": "M.", "lastName": "Roger Worland" }, { "creatorType": "author", "firstName": "Fabio", "lastName": "Baio" }, { "creatorType": "author", "firstName": "Peter", "lastName": "Convey" } ], "abstractNote": "In February 2009 a new permafrost borehole was installed close to the British Antarctic Survey Station at Rothera Point, Adelaide Island (67.57195°S 68.12068°W). The borehole is situated at 31 m asl on a granodiorite knob with scattered lichen cover. The spatial variability of snow cover and of ground surface temperature (GST) is characterised through the monitoring of snow depth on 5 stakes positioned around the borehole and with thermistors placed at three different rock surfaces (A, B and C). The borehole temperature is measured by 18 thermistors placed at different depths between 0.3 and 30 m. Snow persistence is very variable both spatially and temporally with snow free days per year ranging from 13 and more than 300, and maximum snow depth varying between 0.03 and 1.42 m. This variability is the main cause of high variability in GST, that ranged between -3.7 and -1.5 °C. The net effect of the snow cover is a cooling of the surface. Mean annual GST, mean summer GST, and the degree days of thawing and the n-factor of thawing were always much lower at sensor A where snow persistence and depth were greater than in the other sensor locations. At sensor A the potential freeze-thaw events were negligible (0-3) and the thermal stress was at least 40% less than in the other sensor locations. The zero curtain effect at the rock surface occurred only at surface A, favouring chemical weathering over mechanical action. The active layer thickness (ALT) ranged between 0.76 and 1.40 m. ALT was directly proportional to the mean air temperature in summer, and inversely proportional to the maximum snow depth in autumn. ALT temporal variability was greater than reported at other sites at similar latitude in the Northern Hemisphere, or with the similar mean annual air temperature in Maritime Antarctica, because vegetation and a soil organic horizon are absent at the study site. Zero annual amplitude in temperature was observed at about 16 m depth, where the mean annual temperature is -3 °C. Permafrost thickness was calculated to range between 112 and 157 m, depending on the heat flow values adopted. The presence of sub-sea permafrost cannot be excluded considering the depth of the shelf around Rothera Point and its glacial history.", "publicationTitle": "Geomorphology", "publisher": "", "place": "", "date": "", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Geomorphology", "DOI": "10.1016/j.geomorph.2014.03.051", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0169555X14001895", "accessDate": "2014-05-08T08:55:41Z", "PMID": "", "PMCID": "", "ISSN": "0169-555X", "archive": "", "archiveLocation": "", "shortTitle": "Permafrost and snow monitoring at Rothera Point (Adelaide Island, Maritime Antarctica)", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Active layer", "type": 1 }, { "tag": "Antarctica", "type": 1 }, { "tag": "Permafrost", "type": 1 }, { "tag": "Rock weathering", "type": 1 }, { "tag": "ground surface temperature", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-05-08T08:55:41Z", "dateModified": "2014-05-08T08:55:41Z" } }, { "key": "6F5NIBZ5", "version": 3503, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/6F5NIBZ5", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/6F5NIBZ5", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Guglielmin et al.", "parsedDate": "2014-04-01", "numChildren": 0 }, "data": { "key": "6F5NIBZ5", "version": 3503, "itemType": "journalArticle", "title": "Permafrost warming and vegetation changes in continental Antarctica", "creators": [ { "creatorType": "author", "firstName": "Mauro", "lastName": "Guglielmin" }, { "creatorType": "author", "firstName": "Michele Dalle", "lastName": "Fratte" }, { "creatorType": "author", "firstName": "Nicoletta", "lastName": "Cannone" } ], "abstractNote": "Continental Antarctica represents the last pristine environment on Earth and is one of the most suitable contexts to analyze the relations between climate, active layer and vegetation. In 2000 we started long-term monitoring of the climate, permafrost, active layer and vegetation in Victoria Land, continental Antarctica. Our data confirm the stability of mean annual and summer air temperature, of snow cover, and an increasing trend of summer incoming short wave radiation. The active layer thickness is increasing at a rate of 0.3 cm y−1. The active layer is characterized by large annual and spatial differences. The latter are due to scarce vegetation, a patchy and very thin organic layer and large spatial differences in snow accumulation.The active layer thickening, probably due to the increase of incoming short wave radiation, produced a general decrease of the ground water content due to the better drainage of the ground. The resultant drying may be responsible for the decline of mosses in xeric sites, while it provided better conditions for mosses in hydric sites, following the species-specific water requirements. An increase of lichen vegetation was observed where the climate drying occurred. This evidence emphasizes that the Antarctic continent is experiencing changes that are in total contrast to the changes reported from maritime Antarctica.", "publicationTitle": "Environmental Research Letters", "publisher": "", "place": "", "date": "2014-04-01", "volume": "9", "issue": "4", "section": "", "partNumber": "", "partTitle": "", "pages": "045001", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Environ. Res. Lett.", "DOI": "10.1088/1748-9326/9/4/045001", "citationKey": "", "url": "http://iopscience.iop.org/1748-9326/9/4/045001", "accessDate": "2014-04-16T09:49:56Z", "PMID": "", "PMCID": "", "ISSN": "1748-9326", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "Institute of Physics", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-04-16T09:49:56Z", "dateModified": "2014-04-16T09:49:56Z" } }, { "key": "M2NBBM7Q", "version": 3502, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/M2NBBM7Q", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/M2NBBM7Q", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Guglielmin and Vieira", "numChildren": 0 }, "data": { "key": "M2NBBM7Q", "version": 3502, "itemType": "journalArticle", "title": "Permafrost and periglacial research in Antarctica: New results and perspectives", "creators": [ { "creatorType": "author", "firstName": "Mauro", "lastName": "Guglielmin" }, { "creatorType": "author", "firstName": "Gonçalo", "lastName": "Vieira" } ], "abstractNote": "In the last two years the research within the Antarctic Permafrost, Periglacial Environments and Soils (ANTPAS) Expert Group of the Scientific Committee on Antarctic Research (SCAR) and Working Group of the International Permafrost Association (IPA) provided new results on the dynamics of periglacial environments both in Maritime and Continental Antarctica. In continental Antarctica despite the absence of air warming, in the last 15 years an active layer thickening and acceleration of permafrost degradation erosional phenomena were reported, these being mainly related to the increase of solar radiation. On the other hand, in Maritime Antarctica, with a dramatic air warming, permafrost degradation has been observed, but the role of snow cover on the ground energy balance and consequently on permafrost and active layer has been underlined. Moreover, many contributions on the knowledge on the characteristics of the Antarctic soils were carried out in several areas along a wide latitudinal range.", "publicationTitle": "Geomorphology", "publisher": "", "place": "", "date": "", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Geomorphology", "DOI": "10.1016/j.geomorph.2014.04.005", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0169555X14001901", "accessDate": "2014-04-16T09:43:45Z", "PMID": "", "PMCID": "", "ISSN": "0169-555X", "archive": "", "archiveLocation": "", "shortTitle": "Permafrost and periglacial research in Antarctica", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Active layer", "type": 1 }, { "tag": "Antarctica", "type": 1 }, { "tag": "Permafrost", "type": 1 }, { "tag": "soils", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-04-16T09:43:45Z", "dateModified": "2014-04-16T09:43:45Z" } }, { "key": "8VEF8GW4", "version": 3476, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/8VEF8GW4", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/8VEF8GW4", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Kneisel et al.", "numChildren": 0 }, "data": { "key": "8VEF8GW4", "version": 3476, "itemType": "journalArticle", "title": "Application of 3D electrical resistivity imaging for mapping frozen ground conditions exemplified by three case studies", "creators": [ { "creatorType": "author", "firstName": "C.", "lastName": "Kneisel" }, { "creatorType": "author", "firstName": "A.", "lastName": "Emmert" }, { "creatorType": "author", "firstName": "J.", "lastName": "Kästl" } ], "abstractNote": "Periglacial landscapes comprise landforms that are inherently 3D structures, often exhibiting small-scale spatial heterogeneity of surface and subsurface conditions. The objectives of the present paper are to illustrate the potential of the novel application of 3D electrical resistivity imaging for mapping frozen ground conditions exemplified by three case studies with different geomorphological problems to be addressed and to consider the efficacy of the 3D approach to geomorphological investigations in mid-latitude high alpine and high latitude lowland permafrost environments.\nThe approach described in the three case studies includes reconnaissance surveys using two-dimensional electrical resistivity tomography (2D ERT) followed by a detailed mapping using three-dimensional electrical resistivity imaging (3D ERI). The latter approach enables a spatial imaging of the subsurface resistivity distribution and clearly improves the delineation and characterization of subsurface structures compared to state-of-the-art 2D ERT that is limited to findings gained along single profiles or extrapolation between several profiles. Although it can be challenging and time-consuming to apply this technique in periglacial environments, the promising results demonstrate its value for the 3D delineation of frozen ground conditions. In the case of the described case study sites, characterizing the subsurface heterogeneity is close to impossible using drilling or 2D geophysical surveying alone because of the complex 3D nature of the frozen ground characteristics comprising permafrost and permafrost-free areas (alpine permafrost test site) as well as permafrost with variable characteristics (subarctic lowland permafrost test site) at close distance. Even in environments that seem homogeneous at first sight, this method allows us to detect substantial subsurface property variations that can be attributed to different frozen ground conditions. Furthermore, 3D ERI allows the linking of different data sources (e.g., site-specific geomorphology and hydrology) to enhance the spatial understanding of surface and subsurface characteristics and dynamics in permafrost environments. The improved knowledge of the geophysical anatomy and subsurface architecture of the permafrost occurrences revealed by this study suggests a more widespread use for glacial and periglacial landform studies in the future.", "publicationTitle": "Geomorphology", "publisher": "", "place": "", "date": "", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Geomorphology", "DOI": "10.1016/j.geomorph.2013.12.022", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0169555X13006302", "accessDate": "2014-02-14T11:09:32Z", "PMID": "", "PMCID": "", "ISSN": "0169-555X", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "3D electrical resistivity imaging", "type": 1 }, { "tag": "Glacial and periglacial environments", "type": 1 }, { "tag": "Heterogeneous frozen ground conditions", "type": 1 }, { "tag": "Permafrost characteristics", "type": 1 }, { "tag": "Subarctic lowland permafrost", "type": 1 }, { "tag": "alpine permafrost", "type": 1 } ], "collections": [ "NTF93FJ4", "UN94AR8C" ], "relations": {}, "dateAdded": "2014-02-14T11:09:32Z", "dateModified": "2014-02-14T11:09:32Z" } }, { "key": "8Q6DV6T7", "version": 3476, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/8Q6DV6T7", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/8Q6DV6T7", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Echelard et al.", "parsedDate": "2013-11-10", "numChildren": 0 }, "data": { "key": "8Q6DV6T7", "version": 3476, "itemType": "journalArticle", "title": "Détection des mouvements de glaciers rocheux dans les Alpes françaises par interférométrie radar différentielle (D-InSAR) dérivée des archives satellitaires ERS (European Remote Sensing)", "creators": [ { "creatorType": "author", "firstName": "Thomas", "lastName": "Echelard" }, { "creatorType": "author", "firstName": "Jean-Michel", "lastName": "Krysiecki" }, { "creatorType": "author", "firstName": "Michel", "lastName": "Gay" }, { "creatorType": "author", "firstName": "Philippe", "lastName": "Schoeneich" } ], "abstractNote": "L’interférométrie radar différentielle (D-InSAR) est une méthode de mesure basée sur la mesure de la différence de phase entre deux images radars acquises dans un contexte satellitaire, aéroporté ou terrestre. Cette méthode de mesure permet de détecter et de quantifier les déformations de surface. Elle a déjà été éprouvée dans d’autres massifs alpins en Autriche, en Italie ou en Suisse. Dans cette étude, nous nous intéressons à la détection des mouvements des glaciers rocheux dans les Alpes françaises. Nous avons utilisé les images d’archives des satellites radar ERS-1 et ERS-2 (European Remote Sensing) et choisi les données en fonction de deux critères : 1) les paramètres liés à la géométrie et au positionnement des satellites lors de l’acquisition des données et 2) les paramètres météorologiques et topographiques. Pour analyser et valider cette grande quantité de données, deux méthodes ont été employées : 1) une analyse empirique des interférogrammes dans un SIG à l’aide de données topographiques et 2) une comparaison entre les données interférométriques et deux inventaires de glaciers rocheux existants. Finalement, une carte présentant toutes les détections de glaciers rocheux actifs à l’échelle des Alpes françaises a été réalisée.", "publicationTitle": "Géomorphologie : relief, processus, environnement", "publisher": "", "place": "", "date": "2013/11/10", "volume": "", "issue": "3/2013", "section": "", "partNumber": "", "partTitle": "", "pages": "231-242", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "http://geomorphologie.revues.org/10264", "accessDate": "2014-02-14T11:05:27Z", "PMID": "", "PMCID": "", "ISSN": "1266-5304", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "fr", "libraryCatalog": "geomorphologie.revues.org", "callNumber": "", "rights": "© Groupe français de géomorphologie", "extra": "", "tags": [ { "tag": "glacier rocheux", "type": 1 }, { "tag": "interférométrie SAR", "type": 1 }, { "tag": "pergélisol", "type": 1 }, { "tag": "satellites ERS", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-02-14T11:05:27Z", "dateModified": "2014-02-14T11:05:27Z" } }, { "key": "TW5ZRCNS", "version": 3467, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/TW5ZRCNS", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/TW5ZRCNS", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Schneider et al.", "parsedDate": "2013-12-16", "numChildren": 0 }, "data": { "key": "TW5ZRCNS", "version": 3467, "itemType": "journalArticle", "title": "A spatial and temporal analysis of different periglacial materials by using geoelectrical, seismic and borehole temperature data at Murtèl–Corvatsch, Upper Engadin, Swiss Alps", "creators": [ { "creatorType": "author", "firstName": "S.", "lastName": "Schneider" }, { "creatorType": "author", "firstName": "S.", "lastName": "Daengeli" }, { "creatorType": "author", "firstName": "C.", "lastName": "Hauck" }, { "creatorType": "author", "firstName": "M.", "lastName": "Hoelzle" } ], "abstractNote": "", "publicationTitle": "Geographica Helvetica", "publisher": "", "place": "", "date": "2013-12-16", "volume": "68", "issue": "4", "section": "", "partNumber": "", "partTitle": "", "pages": "265-280", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.5194/gh-68-265-2013", "citationKey": "", "url": "http://www.geogr-helv.net/68/265/2013/gh-68-265-2013.html", "accessDate": "2014-01-14T13:10:20Z", "PMID": "", "PMCID": "", "ISSN": "2194-8798", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2014-01-14T13:10:20Z", "dateModified": "2014-01-14T13:10:20Z" } }, { "key": "GC3RSSWM", "version": 3448, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/GC3RSSWM", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/GC3RSSWM", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Fuchs et al.", "parsedDate": "2013", "numChildren": 0 }, "data": { "key": "GC3RSSWM", "version": 3448, "itemType": "journalArticle", "title": "Exploring the potential of luminescence methods for dating Alpine rock glaciers", "creators": [ { "creatorType": "author", "firstName": "Margret C.", "lastName": "Fuchs" }, { "creatorType": "author", "firstName": "Ralph", "lastName": "Böhlert" }, { "creatorType": "author", "firstName": "Matthias", "lastName": "Krbetschek" }, { "creatorType": "author", "firstName": "Frank", "lastName": "Preusser" }, { "creatorType": "author", "firstName": "Markus", "lastName": "Egli" } ], "abstractNote": "Abstract\nRock glaciers contain valuable information about the spatial and temporal distribution of permafrost. The wide distribution of these landforms in high mountains promotes them as useful archives for the deciphering of the environmental conditions during their formation and evolution. However, age constraints are needed to unravel the palaeoclimatic context of rock glaciers, but numerical dating is difficult. Here, we present a case study assessing the potential of luminescence techniques (OSL, IRSL) to date the inner sand-rich layer of active rock glaciers. We focus on the signal properties and the resetting of the signal prior to deposition by investigating single grains. While most quartz shows low signal intensities and problematic luminescence characteristics, K-feldspar exhibits much brighter and well-performing signals. Most signals from plagioclases do not show suitable properties. Luminescence signals far below saturation indicate distinct but differential bleaching. The finite mixture model was used to determine the prominent populations in the equivalent dose distributions. The luminescence ages represent travel times of grains since incorporation into the rock glacier and hence, minimum ages of rock glacier formation. Luminescence ages between 3 ka and 8 ka for three rock glaciers from the Upper Engadine and Albula region (Swiss Alps) agree well with independent age estimates from relative and semi-quantitative approaches. Therefore, luminescence seems to have the potential of revealing age constraints about processes related to the formation of rock glaciers, but further investigations are required for solving some of the problems remaining and reducing the dating uncertainties.", "publicationTitle": "Quaternary Geochronology", "publisher": "", "place": "", "date": "décembre 2013", "volume": "18", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "17-33", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Quaternary Geochronology", "DOI": "10.1016/j.quageo.2013.07.001", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S1871101413000678", "accessDate": "2013-11-18T13:48:47Z", "PMID": "", "PMCID": "", "ISSN": "1871-1014", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Alps", "type": 1 }, { "tag": "IRSL", "type": 1 }, { "tag": "Luminescence dating", "type": 1 }, { "tag": "OSL", "type": 1 }, { "tag": "Rock Glacier", "type": 1 }, { "tag": "Single grains", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2013-11-18T13:48:47Z", "dateModified": "2013-11-18T13:48:47Z" } }, { "key": "S7VMMDHP", "version": 3436, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/S7VMMDHP", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/S7VMMDHP", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Kłapyta", "parsedDate": "2013-12", "numChildren": 0 }, "data": { "key": "S7VMMDHP", "version": 3436, "itemType": "journalArticle", "title": "Application of Schmidt hammer relative age dating to Late Pleistocene moraines and rock glaciers in the Western Tatra Mountains, Slovakia", "creators": [ { "creatorType": "author", "firstName": "Piotr", "lastName": "Kłapyta" } ], "abstractNote": "Abstract\nIn order to evaluate the potential of the Schmidt hammer for relative age dating of Late Pleistocene moraines and rock glaciers, rebound (R) values were collected at 38 sites in two formerly glaciated valleys in the Western Tatras in northern Slovakia. A large statistical population of measurements obtained from moraine and rock glacier surfaces was used to analyze the variability of mean R-values in the same lithology and overall southern valley exposition. Four separate sets of glacial/periglacial morphosystems are present at different positions in the Western Tatras starting from valley outlets to the highest cirques, which represent successive phases of deglaciation. R-value means and 95% confidence intervals for selected Last Glacial Maximum (LGM), and Late Glacial (LG-1, LG-2 and LG-3) stages (respectively, 40.1 ± 1.1, 46 ± 0.5, 53.5 ± 1.0 and 60.5 ± 0.3) are significantly statistically different and values for each age category are comparable for the two analyzed valleys. The results of weathering indexes used in conjunction with geomorphological relationships were taken together to reconstruct the pattern of deglaciation on southern Tatra slopes. It is stated that the Schmidt hammer technique may be successfully used as a relative age dating tool for Late Pleistocene glacial and periglacial deposits, and with this method, it is possible to differentiate between Late Glacial moraines and rock glacier systems of different age.", "publicationTitle": "CATENA", "publisher": "", "place": "", "date": "December 2013", "volume": "111", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "104-121", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "CATENA", "DOI": "10.1016/j.catena.2013.07.004", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0341816213001732", "accessDate": "2013-10-10T08:54:21Z", "PMID": "", "PMCID": "", "ISSN": "0341-8162", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Late Glacial", "type": 1 }, { "tag": "Moraines", "type": 1 }, { "tag": "Relict rock glaciers", "type": 1 }, { "tag": "Schmidt hammer dating", "type": 1 }, { "tag": "Slovakia", "type": 1 }, { "tag": "Western Tatra Mountains", "type": 1 } ], "collections": [ "NTF93FJ4", "UN94AR8C" ], "relations": {}, "dateAdded": "2013-10-10T08:54:21Z", "dateModified": "2013-10-10T08:54:21Z" } }, { "key": "2M5AXK4T", "version": 3433, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/2M5AXK4T", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/2M5AXK4T", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Kerguillec", "parsedDate": "2013", "numChildren": 0 }, "data": { "key": "2M5AXK4T", "version": 3433, "itemType": "journalArticle", "title": "Recent patterned grounds development on a glacier surface (Dovrefjell, central Norway): an ephemeral periglacial activity in a paraglacial context", "creators": [ { "creatorType": "author", "firstName": "Riwan", "lastName": "Kerguillec" } ], "abstractNote": "Researches carried out on the main glacier of the Dovrefjell massif, Scandes Mountains, Norway (62° N; 9° E) point to recent periglacial features which are presently directly developed on the ice. This original location raises the problem of their morphodynamic significance and a hypothesis of ephemeral periglacial activity in a paraglacial context is proposed here.", "publicationTitle": "Geografiska Annaler: Series A, Physical Geography", "publisher": "", "place": "", "date": "2013", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "n/a–n/a", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1111/geoa.12019", "citationKey": "", "url": "http://onlinelibrary.wiley.com/doi/10.1111/geoa.12019/abstract", "accessDate": "2013-10-07T12:36:30Z", "PMID": "", "PMCID": "", "ISSN": "1468-0459", "archive": "", "archiveLocation": "", "shortTitle": "Recent patterned grounds development on a glacier surface (Dovrefjell, central Norway)", "language": "en", "libraryCatalog": "Wiley Online Library", "callNumber": "", "rights": "© 2013 Swedish Society for Anthropology and Geography", "extra": "", "tags": [ { "tag": "Norway", "type": 1 }, { "tag": "glacier retreat", "type": 1 }, { "tag": "paraglacial dynamics", "type": 1 }, { "tag": "periglacial dynamics", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2013-10-07T12:36:30Z", "dateModified": "2013-10-07T12:36:30Z" } }, { "key": "PMHT79PC", "version": 3432, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/PMHT79PC", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/PMHT79PC", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Thiry et al.", "parsedDate": "2013-09-01", "numChildren": 0 }, "data": { "key": "PMHT79PC", "version": 3432, "itemType": "journalArticle", "title": "Periglacial morphogenesis in the Paris basin: insight from geophysical survey and consequences for the fate of soil pollution", "creators": [ { "creatorType": "author", "firstName": "Médard", "lastName": "Thiry" }, { "creatorType": "author", "firstName": "Folkert", "lastName": "van Oort" }, { "creatorType": "author", "firstName": "Julien", "lastName": "Thiesson" }, { "creatorType": "author", "firstName": "Brigitte", "lastName": "Van Vliet-Lanoe" } ], "abstractNote": "Abstract\nGeophysical survey by Automatic Resistivity Profiling (ARP©) system of the Pierrelaye–Bessancourt area revealed remarkable conductive polygon patterns of 20- to 30-m diameter detected between 0.5- and 1.7-m depth. Trenches dug down to the limestone substrate allowed detailing of the pedological and lithological units that compose such polygonal features. The patterns are formed by greenish glauconite and carbonated sand hollows where clay-rich pedological horizons bend downward, forming narrow tongs extending up to 2- to 3-m depth. Such structures were interpreted as a buried polygonal ice-wedge network (thermokarst depressions). Geometrical relationships between the lithological units and consecutive erosional surfaces allowed the identification of successive landscape events and a landscape chronology. The sequence started during the Saalian glaciation with (1) the development of patterned grounds by thermokarstic cryoturbation; (2) the consecutive deflation/erosion during post-permafrost aridity; (3) the loess and eolian sand deposits; (4) the weathering of the former deposits with development of pedogenic horizons during the Eemian interglacial; (5) the recurrent cryoturbation and thermal cracking leading to infolding of the pedogenic horizons during the Pleniglacial optimum (Weichselian); and finally (5) the erosion that levelled the periglacial microreliefs, most probably during the last glacial stage (Weichselian), leading to the modern landscape. In this agricultural area, urban waste water has been spread for more than 100 years by flooding irrigation for food crop production and has led to high levels of metal pollution in the surface horizons of the soils. The polygonal cryogenic structures have major impacts on soil hydrology and dispersion/distribution of heavy metals toward the geological substrate. Such structures are essential to consider when conceiving proposals for future soil management of this polluted area.", "publicationTitle": "Geomorphology", "publisher": "", "place": "", "date": "septembre 1, 2013", "volume": "197", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "34-44", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Geomorphology", "DOI": "10.1016/j.geomorph.2013.04.027", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0169555X13002432", "accessDate": "2013-10-07T11:56:40Z", "PMID": "", "PMCID": "", "ISSN": "0169-555X", "archive": "", "archiveLocation": "", "shortTitle": "Periglacial morphogenesis in the Paris basin", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Cryoturbation", "type": 1 }, { "tag": "Electrical mapping", "type": 1 }, { "tag": "Geophysical method", "type": 1 }, { "tag": "Periglacial", "type": 1 }, { "tag": "pollution", "type": 1 }, { "tag": "soils", "type": 1 } ], "collections": [ "NTF93FJ4", "UN94AR8C", "WN9F88J4" ], "relations": {}, "dateAdded": "2013-10-07T11:56:40Z", "dateModified": "2013-10-07T11:56:40Z" } }, { "key": "4CTG88UW", "version": 3426, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/4CTG88UW", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/4CTG88UW", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Johnson et al.", "parsedDate": "2013-09-01", "numChildren": 0 }, "data": { "key": "4CTG88UW", "version": 3426, "itemType": "journalArticle", "title": "Permafrost and organic layer interactions over a climate gradient in a discontinuous permafrost zone", "creators": [ { "creatorType": "author", "firstName": "Kristofer D.", "lastName": "Johnson" }, { "creatorType": "author", "firstName": "Jennifer W.", "lastName": "Harden" }, { "creatorType": "author", "firstName": "A. David", "lastName": "McGuire" }, { "creatorType": "author", "firstName": "Mark", "lastName": "Clark" }, { "creatorType": "author", "firstName": "Fengming", "lastName": "Yuan" }, { "creatorType": "author", "firstName": "Andrew O.", "lastName": "Finley" } ], "abstractNote": "Permafrost is tightly coupled to the organic soil layer, an interaction that mediates permafrost degradation in response to regional warming. We analyzed changes in permafrost occurrence and organic layer thickness (OLT) using more than 3000 soil pedons across a mean annual temperature (MAT) gradient. Cause and effect relationships between permafrost probability (PF), OLT, and other topographic factors were investigated using structural equation modeling in a multi-group analysis. Groups were defined by slope, soil texture type, and shallow (<28 cm) versus deep organic (≥28 cm) layers. The probability of observing permafrost sharply increased by 0.32 for every 10-cm OLT increase in shallow OLT soils (OLTs) due to an insulation effect, but PF decreased in deep OLT soils (OLTd) by 0.06 for every 10-cm increase. Across the MAT gradient, PF in sandy soils varied little, but PF in loamy and silty soils decreased substantially from cooler to warmer temperatures. The change in OLT was more heterogeneous across soil texture types—in some there was no change while in others OLTs soils thinned and/or OLTd soils thickened at warmer locations. Furthermore, when soil organic carbon was estimated using a relationship with thickness, the average increase in carbon in OLTd soils was almost four times greater compared to the average decrease in carbon in OLTs soils across all soil types. If soils follow a trajectory of warming that mimics the spatial gradients found today, then heterogeneities of permafrost degradation and organic layer thinning and thickening should be considered in the regional carbon balance.", "publicationTitle": "Environmental Research Letters", "publisher": "", "place": "", "date": "2013-09-01", "volume": "8", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "035028", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Environ. Res. Lett.", "DOI": "10.1088/1748-9326/8/3/035028", "citationKey": "", "url": "http://iopscience.iop.org/1748-9326/8/3/035028", "accessDate": "2013-08-26T13:36:23Z", "PMID": "", "PMCID": "", "ISSN": "1748-9326", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "Institute of Physics", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2013-08-26T13:36:23Z", "dateModified": "2013-08-26T13:36:23Z" } }, { "key": "S8BE5ZSD", "version": 3422, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/S8BE5ZSD", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/S8BE5ZSD", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Vonk et al.", "parsedDate": "2013-09-01", "numChildren": 0 }, "data": { "key": "S8BE5ZSD", "version": 3422, "itemType": "journalArticle", "title": "Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw", "creators": [ { "creatorType": "author", "firstName": "J. E.", "lastName": "Vonk" }, { "creatorType": "author", "firstName": "P. J.", "lastName": "Mann" }, { "creatorType": "author", "firstName": "K. L.", "lastName": "Dowdy" }, { "creatorType": "author", "firstName": "A.", "lastName": "Davydova" }, { "creatorType": "author", "firstName": "S. P.", "lastName": "Davydov" }, { "creatorType": "author", "firstName": "N.", "lastName": "Zimov" }, { "creatorType": "author", "firstName": "R. G. M.", "lastName": "Spencer" }, { "creatorType": "author", "firstName": "E. B.", "lastName": "Bulygina" }, { "creatorType": "author", "firstName": "T. I.", "lastName": "Eglinton" }, { "creatorType": "author", "firstName": "R. M.", "lastName": "Holmes" } ], "abstractNote": "Pleistocene Yedoma permafrost contains nearly a third of all organic matter (OM) stored in circum-arctic permafrost and is characterized by the presence of massive ice wedges. Due to its rapid formation by sediment accumulation and subsequent frozen storage, Yedoma OM is relatively well preserved and highly biologically available (biolabile) upon thaw. A better understanding of the processes regulating Yedoma degradation is important to improve estimates of the response and magnitude of permafrost carbon feedbacks to climate warming. In this study, we examine the composition of ice wedges and the influence of ice wedge thaw on the biolability of Yedoma OM. Incubation assays were used to assess OM biolability, fluorescence spectroscopy to characterize the OM composition, and potential enzyme activity rates to examine the controls and regulation of OM degradation. We show that increasing amounts of ice wedge melt water in Yedoma-leached incubations enhanced the loss of dissolved OM over time. This may be attributed to the presence of low-molecular weight compounds and low initial phenolic content in the OM of ice wedges, providing a readily available substrate that promotes the degradation of Yedoma OC. The physical vulnerability of ice wedges upon thaw (causing irreversible collapse), combined with the composition of ice wedge-engrained OM (co-metabolizing old OM), underlines the particularly strong potential of Yedoma to generate a positive feedback to climate warming relative to other forms of non-ice wedge permafrost.", "publicationTitle": "Environmental Research Letters", "publisher": "", "place": "", "date": "2013-09-01", "volume": "8", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "035023", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Environ. Res. Lett.", "DOI": "10.1088/1748-9326/8/3/035023", "citationKey": "", "url": "http://iopscience.iop.org/1748-9326/8/3/035023", "accessDate": "2013-08-12T14:43:53Z", "PMID": "", "PMCID": "", "ISSN": "1748-9326", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "Institute of Physics", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "JEFVAP6K", "NTF93FJ4" ], "relations": {}, "dateAdded": "2013-08-12T14:43:53Z", "dateModified": "2013-08-12T14:43:53Z" } }, { "key": "DZNVWA8R", "version": 3417, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/DZNVWA8R", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/DZNVWA8R", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Springman et al.", "parsedDate": "2013", "numChildren": 0 }, "data": { "key": "DZNVWA8R", "version": 3417, "itemType": "bookSection", "title": "Rock Glacier Degradation and Instabilities in the European Alps: A Characterisation and Monitoring Experiment in the Turtmanntal, CH", "creators": [ { "creatorType": "editor", "firstName": "Claudio", "lastName": "Margottini" }, { "creatorType": "editor", "firstName": "Paolo", "lastName": "Canuti" }, { "creatorType": "editor", "firstName": "Kyoji", "lastName": "Sassa" }, { "creatorType": "author", "firstName": "Sarah M.", "lastName": "Springman" }, { "creatorType": "author", "firstName": "Yuko", "lastName": "Yamamoto" }, { "creatorType": "author", "firstName": "Thomas", "lastName": "Buchli" }, { "creatorType": "author", "firstName": "Marian", "lastName": "Hertrich" }, { "creatorType": "author", "firstName": "Hansruedi", "lastName": "Maurer" }, { "creatorType": "author", "firstName": "Kaspar", "lastName": "Merz" }, { "creatorType": "author", "firstName": "Isabelle", "lastName": "Gärtner-Roer" }, { "creatorType": "author", "firstName": "Linda", "lastName": "Seward" } ], "abstractNote": "", "bookTitle": "Landslide Science and Practice", "series": "", "seriesNumber": "", "volume": "", "numberOfVolumes": "", "edition": "", "date": "2013", "publisher": "Springer Berlin Heidelberg", "place": "Berlin, Heidelberg", "originalDate": "", "originalPublisher": "", "originalPlace": "", "format": "", "pages": "5-13", "ISBN": "978-3-642-31336-3, 978-3-642-31337-0", "DOI": "", "citationKey": "", "url": "http://link.springer.com/10.1007/978-3-642-31337-0_1", "accessDate": "2013-08-07T15:09:47Z", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "Rock Glacier Degradation and Instabilities in the European Alps", "language": "", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2013-08-07T15:09:47Z", "dateModified": "2013-08-07T15:09:47Z" } }, { "key": "8PZDXGNI", "version": 3413, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/8PZDXGNI", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/8PZDXGNI", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "ATS", "parsedDate": "2013-09-07", "numChildren": 0 }, "data": { "key": "8PZDXGNI", "version": 3413, "itemType": "newspaperArticle", "title": "Géophysique: il y a permafrost et permafrost, selon UNIFR", "creators": [ { "creatorType": "author", "firstName": "", "lastName": "ATS" } ], "abstractNote": "Fribourg Des chercheurs de l'Université de Fribourg (UNIFR) ont mis au point une modélisation informatique permettant d'estimer la fonte des nombreux permafrost, souvent très différents. Ces travaux sont publiés dans le \"Journal of Geophysical Research\".", "publicationTitle": "Le Temps (Genève-Suisse)", "publisher": "", "place": "", "date": "09.07.2013", "volume": "", "issue": "", "edition": "", "section": "", "pages": "", "ISSN": "", "DOI": "", "citationKey": "", "url": "http://www.letemps.ch/Page/Uuid/a6f20fd2-e88a-11e2-b278-9584a54a6a65/G%C3%A9ophysique_il_y_a_permafrost_et_permafrost_selon_UNIFR#.Ud1p_VNSQno", "accessDate": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2013-07-10T14:04:39Z", "dateModified": "2013-07-10T14:05:28Z" } }, { "key": "X23FKXFS", "version": 3410, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/X23FKXFS", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/X23FKXFS", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Lebrouc et al.", "numChildren": 0 }, "data": { "key": "X23FKXFS", "version": 3410, "itemType": "journalArticle", "title": "Modeling permafrost extension in a rock slope since the Last Glacial Maximum: Application to the large Séchilienne landslide (French Alps)", "creators": [ { "creatorType": "author", "firstName": "V.", "lastName": "Lebrouc" }, { "creatorType": "author", "firstName": "S.", "lastName": "Schwartz" }, { "creatorType": "author", "firstName": "L.", "lastName": "Baillet" }, { "creatorType": "author", "firstName": "D.", "lastName": "Jongmans" }, { "creatorType": "author", "firstName": "J.F.", "lastName": "Gamond" } ], "abstractNote": "Abstract \nRecent dating performed on large landslides in the Alps has revealed that the initiation of instability did not immediately follow deglaciation but occurred several thousand years after ice down-wastage in the valleys. This result indicates that debuttressing is not the immediate cause of landslide initiation. The period of slope destabilization appears to coincide with the wetter and warmer Holocene Climatic Optimum, indicating a climatic cause of landslide triggering, although the role of seismic activity cannot be ruled out. A phenomenon which may partly explain the delay between valley deglaciation and gravitational instability is the temporal persistence of thick permafrost layers developed in the Alps since the Last Glacial Maximum (LGM). This hypothesis was tested through 2D thermal numerical modeling of the large Séchilienne landslide (Romanche valley, French Alps) using plausible input parameter values. Simulation results suggest that permafrost vanished in the Séchilienne slope at 10 to 11 ka, 3000 to 4000 years following the total ice down-wastage of the Romanche valley at 14.3 ka. Permafrost persistence could have contributed to the failure delay by temporally strengthening the slope. Numerical simulations also show that the permafrost depth expansion approximately fits the thickness of ground affected by gravitational destabilization, as deduced from geophysical investigations. These results further suggest that permafrost development, associated with an ice segregation mechanism, damaged the rock slope and influenced the resulting landslide geometry.", "publicationTitle": "Geomorphology", "publisher": "", "place": "", "date": "", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Geomorphology", "DOI": "10.1016/j.geomorph.2013.06.001", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0169555X13003115", "accessDate": "2013-07-05T12:52:36Z", "PMID": "", "PMCID": "", "ISSN": "0169-555X", "archive": "", "archiveLocation": "", "shortTitle": "Modeling permafrost extension in a rock slope since the Last Glacial Maximum", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "French Alps", "type": 1 }, { "tag": "Large landslide", "type": 1 }, { "tag": "Last Glacial Maximum", "type": 1 }, { "tag": "Permafrost modeling", "type": 1 }, { "tag": "Séchilienne", "type": 1 }, { "tag": "TTOP model", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2013-07-05T12:52:36Z", "dateModified": "2013-07-05T12:52:36Z" } }, { "key": "ZESQZGPM", "version": 3408, "library": { "type": "group", "id": 4428, "name": "Eau et GEOpatrimoine-IGD", "links": { "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/4428/items/ZESQZGPM", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/eau_et_geopatrimoine-igd/items/ZESQZGPM", "type": "text/html" } }, "meta": { "createdByUser": { "id": 40833, "username": "CedocIGUL", "name": "Centre de documentation (UNIL-IGD, CH)", "links": { "alternate": { "href": "https://www.zotero.org/cedocigul", "type": "text/html" } } }, "creatorSummary": "Krautblatter et al.", "parsedDate": "2013", "numChildren": 0 }, "data": { "key": "ZESQZGPM", "version": 3408, "itemType": "journalArticle", "title": "Why permafrost rocks become unstable: a rock–ice-mechanical model in time and space", "creators": [ { "creatorType": "author", "firstName": "Michael", "lastName": "Krautblatter" }, { "creatorType": "author", "firstName": "Daniel", "lastName": "Funk" }, { "creatorType": "author", "firstName": "Friederike K.", "lastName": "Günzel" } ], "abstractNote": "In this paper, we develop a mechanical model that relates the destabilization of thawing permafrost rock slopes to temperature-related effects on both, rock- and ice-mechanics; and laboratory testing of key assumptions is performed. Degrading permafrost is considered to be an important factor for rock–slope failures in alpine and arctic environments, but the mechanics are poorly understood. The destabilization is commonly attributed to changes in ice-mechanical properties while bedrock friction and fracture propagation have not been considered yet. However, fracture toughness, compressive and tensile strength decrease by up to 50% and more when intact water-saturated rock thaws. Based on literature and experiments, we develop a modified Mohr–Coulomb failure criterion for ice-filled rock fractures that incorporates fracturing of rock bridges, friction of rough fracture surfaces, ductile creep of ice and detachment mechanisms along rock–ice interfaces. Novel laboratory setups were developed to assess the temperature dependency of the friction of ice-free rock–rock interfaces and the shear detachment of rock–ice interfaces. In degrading permafrost, rock-mechanical properties may control early stages of destabilization and become more important for higher normal stress, i.e. higher magnitudes of rock–slope failure. Ice-mechanical properties outbalance the importance of rock-mechanical components after the deformation accelerates and are more relevant for smaller magnitudes. The model explains why all magnitudes of rock–slope failures can be prepared and triggered by permafrost degradation and is capable of conditioning long para-glacial response times. Here, we present a synoptic rock- and ice-mechanical model that explains the mechanical destabilization processes operating in warming permafrost rocks. Copyright © 2013 John Wiley & Sons, Ltd.", "publicationTitle": "Earth Surface Processes and Landforms", "publisher": "", "place": "", "date": "2013", "volume": "38", "issue": "8", "section": "", "partNumber": "", "partTitle": "", "pages": "876–887", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1002/esp.3374", "citationKey": "", "url": "http://onlinelibrary.wiley.com/doi/10.1002/esp.3374/abstract", "accessDate": "2013-07-01T14:03:41Z", "PMID": "", "PMCID": "", "ISSN": "1096-9837", "archive": "", "archiveLocation": "", "shortTitle": "Why permafrost rocks become unstable", "language": "en", "libraryCatalog": "Wiley Online Library", "callNumber": "", "rights": "Copyright © 2013 John Wiley & Sons, Ltd.", "extra": "", "tags": [ { "tag": "Permafrost", "type": 1 }, { "tag": "mountain geomorphology", "type": 1 }, { "tag": "para-glacial geomorphology", "type": 1 }, { "tag": "rock–ice mechanics", "type": 1 }, { "tag": "rock–slope stability", "type": 1 } ], "collections": [ "NTF93FJ4" ], "relations": {}, "dateAdded": "2013-07-01T14:03:41Z", "dateModified": "2013-07-01T14:03:41Z" } } ]