Sensitivity of ice-cemented Antarctic slopes to increases in summer thaw
Summary We employed a Mohr-Coulomb safety factor equation to assess the response of ice-cemented slopes in the stable upland zone of the McMurdo Dry Valleys (MDV) to artificial increases in mean summertime soil surface temperatures (MSSST). Results show that ice-rich, silty tills on slopes 20 ° coul...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.516.3855 2023-05-15T13:51:30+02:00 Sensitivity of ice-cemented Antarctic slopes to increases in summer thaw Kate M. Swanger David R. Marchant The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.3855 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea039.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.3855 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea039.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea039.pdf text ftciteseerx 2016-01-08T09:53:31Z Summary We employed a Mohr-Coulomb safety factor equation to assess the response of ice-cemented slopes in the stable upland zone of the McMurdo Dry Valleys (MDV) to artificial increases in mean summertime soil surface temperatures (MSSST). Results show that ice-rich, silty tills on slopes 20 ° could fail by planar sliding with an in-crease in MSSST of ~5º to 9ºC. This change corresponds to an atmospheric increase of ~5º to 9ºC, which lies just outside the envelope of warming predicted to occur in this region over the next century. If we assume that current soil-moisture conditions can be applied to slope deposits in the distant past, and that these slope deposits have re-mained physically stable for millions of years, then our results suggest that MSSST in the upland zone did not in-crease by more than ~5º to 9ºC since deposition of most deposits, perhaps as much as 10 million years ago. Text Antarc* Antarctic McMurdo Dry Valleys Unknown Antarctic McMurdo Dry Valleys |
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Open Polar |
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ftciteseerx |
language |
English |
description |
Summary We employed a Mohr-Coulomb safety factor equation to assess the response of ice-cemented slopes in the stable upland zone of the McMurdo Dry Valleys (MDV) to artificial increases in mean summertime soil surface temperatures (MSSST). Results show that ice-rich, silty tills on slopes 20 ° could fail by planar sliding with an in-crease in MSSST of ~5º to 9ºC. This change corresponds to an atmospheric increase of ~5º to 9ºC, which lies just outside the envelope of warming predicted to occur in this region over the next century. If we assume that current soil-moisture conditions can be applied to slope deposits in the distant past, and that these slope deposits have re-mained physically stable for millions of years, then our results suggest that MSSST in the upland zone did not in-crease by more than ~5º to 9ºC since deposition of most deposits, perhaps as much as 10 million years ago. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Kate M. Swanger David R. Marchant |
spellingShingle |
Kate M. Swanger David R. Marchant Sensitivity of ice-cemented Antarctic slopes to increases in summer thaw |
author_facet |
Kate M. Swanger David R. Marchant |
author_sort |
Kate M. Swanger |
title |
Sensitivity of ice-cemented Antarctic slopes to increases in summer thaw |
title_short |
Sensitivity of ice-cemented Antarctic slopes to increases in summer thaw |
title_full |
Sensitivity of ice-cemented Antarctic slopes to increases in summer thaw |
title_fullStr |
Sensitivity of ice-cemented Antarctic slopes to increases in summer thaw |
title_full_unstemmed |
Sensitivity of ice-cemented Antarctic slopes to increases in summer thaw |
title_sort |
sensitivity of ice-cemented antarctic slopes to increases in summer thaw |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.3855 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea039.pdf |
geographic |
Antarctic McMurdo Dry Valleys |
geographic_facet |
Antarctic McMurdo Dry Valleys |
genre |
Antarc* Antarctic McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic McMurdo Dry Valleys |
op_source |
http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea039.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.3855 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea039.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766255370700849152 |