Ice cap melting and low‐viscosity crustal root explain the narrow geodetic uplift of the Western Alps
More than 10 years of geodetic measurements demonstrate an uplift rate of 1–3 mm/yr of the high topography region of the Western Alps. By contrast, no significant horizontal motion has been detected. Two uplift mechanisms have been proposed: (1) the isostatic response to denudation responsible for o...
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| Veröffentlicht in: | Geophysical research letters 2016-04, Vol.43 (7), p.3193-3200 |
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| creator | Chéry, J. Genti, M. Vernant, P. |
| description | More than 10 years of geodetic measurements demonstrate an uplift rate of 1–3 mm/yr of the high topography region of the Western Alps. By contrast, no significant horizontal motion has been detected. Two uplift mechanisms have been proposed: (1) the isostatic response to denudation responsible for only a fraction of the observed uplift and (2) the rebound induced by the Wurmian ice cap melting which predicts a broader uplifting region than the one evidenced by geodetic observations. Using a numerical model to fit the geodetic data, we show that a crustal viscosity contrast between the foreland and the central part of the Alps, the latter being weaker with a viscosity of 1021 Pa s, is needed. The vertical rates are enhanced if the strong uppermost mantle beneath the Moho is interrupted across the Alps, therefore allowing a weak vertical rheological anomaly over the entire lithosphere.
Key Points
Explanation for the geodetic uplift of the Alps
Revisit the relation between deglaciation and uplift
Pointing out the key role of rheology on strain |
| doi_str_mv | 10.1002/2016GL067821 |
| format | Article |
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Key Points
Explanation for the geodetic uplift of the Alps
Revisit the relation between deglaciation and uplift
Pointing out the key role of rheology on strain</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2016GL067821</identifier><language>eng</language><publisher>Washington: John Wiley & Sons, Inc</publisher><subject>Alps ; Deglaciation ; Denudation ; Earth Sciences ; geodesy ; Geodetics ; Geophysics ; Lithosphere ; lithosphere rheology ; Marine ; Mathematical models ; Melting ; postglacial rebound ; Rheology ; Sciences of the Universe ; Topography ; Uplift ; vertical motion ; Viscosity</subject><ispartof>Geophysical research letters, 2016-04, Vol.43 (7), p.3193-3200</ispartof><rights>2016. American Geophysical Union. All Rights Reserved.</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a5371-4cfa05152f08faa20e6e80f663a78cfaa9d0048e9e83e89832611d95e3b03cae3</citedby><cites>FETCH-LOGICAL-a5371-4cfa05152f08faa20e6e80f663a78cfaa9d0048e9e83e89832611d95e3b03cae3</cites><orcidid>0000-0003-2192-2314 ; 0000-0001-5185-0070</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2016GL067821$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2016GL067821$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,776,780,881,1411,1427,11494,27903,27904,45553,45554,46387,46446,46811,46870</link.rule.ids><backlink>$$Uhttps://hal.science/hal-01332757$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Chéry, J.</creatorcontrib><creatorcontrib>Genti, M.</creatorcontrib><creatorcontrib>Vernant, P.</creatorcontrib><title>Ice cap melting and low‐viscosity crustal root explain the narrow geodetic uplift of the Western Alps</title><title>Geophysical research letters</title><description>More than 10 years of geodetic measurements demonstrate an uplift rate of 1–3 mm/yr of the high topography region of the Western Alps. By contrast, no significant horizontal motion has been detected. Two uplift mechanisms have been proposed: (1) the isostatic response to denudation responsible for only a fraction of the observed uplift and (2) the rebound induced by the Wurmian ice cap melting which predicts a broader uplifting region than the one evidenced by geodetic observations. Using a numerical model to fit the geodetic data, we show that a crustal viscosity contrast between the foreland and the central part of the Alps, the latter being weaker with a viscosity of 1021 Pa s, is needed. The vertical rates are enhanced if the strong uppermost mantle beneath the Moho is interrupted across the Alps, therefore allowing a weak vertical rheological anomaly over the entire lithosphere.
Key Points
Explanation for the geodetic uplift of the Alps
Revisit the relation between deglaciation and uplift
Pointing out the key role of rheology on strain</description><subject>Alps</subject><subject>Deglaciation</subject><subject>Denudation</subject><subject>Earth Sciences</subject><subject>geodesy</subject><subject>Geodetics</subject><subject>Geophysics</subject><subject>Lithosphere</subject><subject>lithosphere rheology</subject><subject>Marine</subject><subject>Mathematical models</subject><subject>Melting</subject><subject>postglacial rebound</subject><subject>Rheology</subject><subject>Sciences of the Universe</subject><subject>Topography</subject><subject>Uplift</subject><subject>vertical motion</subject><subject>Viscosity</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqN0c2KFDEQAOAgCo6rNx8g4EXB0UrSnaSPw7LOLjQIongMZU_1bJZMp026d5ybj7DPuE9ixhERD-IpReqjqB_Gngt4IwDkWwlCr1vQxkrxgC1EU1VLC2AesgVAU2Jp9GP2JOcbAFCgxIJtrzriHY58R2Hyw5bjsOEh7u-_39363MXspwPv0pwnDDzFOHH6Ngb0A5-uiQ-YUtzzLcUNTb7j8xh8P_HY_8x-pjxRGvgqjPkpe9RjyPTs13vGPr27-Hh-uWzfr6_OV-0Sa2XEsup6hFrUsgfbI0ogTRZ6rRUaW3LYbAAqSw1ZRbaxSmohNk1N6guoDkmdsVenutcY3Jj8DtPBRfTuctW64x8IpaSpza0o9uXJjil-nUuzbldGphBwoDhnJyxYpa2q_o9CY2StC33xF72JcxrK0E4YW9WNMfqoXp9Ul2LOifrfzQpwx2O6P49ZuDzxvQ90-Kd16w9tXZW9qB-Qwp86</recordid><startdate>20160416</startdate><enddate>20160416</enddate><creator>Chéry, J.</creator><creator>Genti, M.</creator><creator>Vernant, P.</creator><general>John Wiley & Sons, Inc</general><general>American Geophysical Union</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>7UA</scope><scope>C1K</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0003-2192-2314</orcidid><orcidid>https://orcid.org/0000-0001-5185-0070</orcidid></search><sort><creationdate>20160416</creationdate><title>Ice cap melting and low‐viscosity crustal root explain the narrow geodetic uplift of the Western Alps</title><author>Chéry, J. ; Genti, M. ; Vernant, P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a5371-4cfa05152f08faa20e6e80f663a78cfaa9d0048e9e83e89832611d95e3b03cae3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Alps</topic><topic>Deglaciation</topic><topic>Denudation</topic><topic>Earth Sciences</topic><topic>geodesy</topic><topic>Geodetics</topic><topic>Geophysics</topic><topic>Lithosphere</topic><topic>lithosphere rheology</topic><topic>Marine</topic><topic>Mathematical models</topic><topic>Melting</topic><topic>postglacial rebound</topic><topic>Rheology</topic><topic>Sciences of the Universe</topic><topic>Topography</topic><topic>Uplift</topic><topic>vertical motion</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chéry, J.</creatorcontrib><creatorcontrib>Genti, M.</creatorcontrib><creatorcontrib>Vernant, P.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chéry, J.</au><au>Genti, M.</au><au>Vernant, P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ice cap melting and low‐viscosity crustal root explain the narrow geodetic uplift of the Western Alps</atitle><jtitle>Geophysical research letters</jtitle><date>2016-04-16</date><risdate>2016</risdate><volume>43</volume><issue>7</issue><spage>3193</spage><epage>3200</epage><pages>3193-3200</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>More than 10 years of geodetic measurements demonstrate an uplift rate of 1–3 mm/yr of the high topography region of the Western Alps. By contrast, no significant horizontal motion has been detected. Two uplift mechanisms have been proposed: (1) the isostatic response to denudation responsible for only a fraction of the observed uplift and (2) the rebound induced by the Wurmian ice cap melting which predicts a broader uplifting region than the one evidenced by geodetic observations. Using a numerical model to fit the geodetic data, we show that a crustal viscosity contrast between the foreland and the central part of the Alps, the latter being weaker with a viscosity of 1021 Pa s, is needed. The vertical rates are enhanced if the strong uppermost mantle beneath the Moho is interrupted across the Alps, therefore allowing a weak vertical rheological anomaly over the entire lithosphere.
Key Points
Explanation for the geodetic uplift of the Alps
Revisit the relation between deglaciation and uplift
Pointing out the key role of rheology on strain</abstract><cop>Washington</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/2016GL067821</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-2192-2314</orcidid><orcidid>https://orcid.org/0000-0001-5185-0070</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete; Wiley Online Library Free Content; Wiley Online Library AGU Free Content; EZB-FREE-00999 freely available EZB journals |
| subjects | Alps Deglaciation Denudation Earth Sciences geodesy Geodetics Geophysics Lithosphere lithosphere rheology Marine Mathematical models Melting postglacial rebound Rheology Sciences of the Universe Topography Uplift vertical motion Viscosity |
| title | Ice cap melting and low‐viscosity crustal root explain the narrow geodetic uplift of the Western Alps |
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