Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum
We investigate changing precipitation patterns in the Kangerlussuaq region of western central Greenland during the Holocene thermal maximum (HTM), using a new chronology of ice sheet terminus position through the Holocene and a novel inverse modeling approach based on the unscented transform (UT). T...
Published in: | The Cryosphere |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00051069 2023-05-15T16:27:27+02:00 Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum Downs, Jacob Johnson, Jesse Briner, Jason Young, Nicolás Lesnek, Alia Cuzzone, Josh 2020-03 electronic https://doi.org/10.5194/tc-14-1121-2020 https://noa.gwlb.de/receive/cop_mods_00051069 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050726/tc-14-1121-2020.pdf https://tc.copernicus.org/articles/14/1121/2020/tc-14-1121-2020.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-14-1121-2020 https://noa.gwlb.de/receive/cop_mods_00051069 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050726/tc-14-1121-2020.pdf https://tc.copernicus.org/articles/14/1121/2020/tc-14-1121-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/tc-14-1121-2020 2022-02-08T22:36:34Z We investigate changing precipitation patterns in the Kangerlussuaq region of western central Greenland during the Holocene thermal maximum (HTM), using a new chronology of ice sheet terminus position through the Holocene and a novel inverse modeling approach based on the unscented transform (UT). The UT is applied to estimate changes in annual precipitation in order to reduce the misfit between modeled and observed terminus positions. We demonstrate the effectiveness of the UT for time-dependent data assimilation, highlighting its low computational cost and trivial parallel implementation. Our results indicate that Holocene warming coincided with elevated precipitation, without which modeled retreat in the Kangerlussuaq region is more rapid than suggested by observations. Less conclusive is whether high temperatures during the HTM were specifically associated with a transient increase in precipitation, as the results depend on the assumed temperature history. Our results highlight the important role that changing precipitation patterns had in controlling ice sheet extent during the Holocene. Article in Journal/Newspaper Greenland Ice Sheet Kangerlussuaq The Cryosphere Niedersächsisches Online-Archiv NOA Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) The Cryosphere 14 3 1121 1137 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Downs, Jacob Johnson, Jesse Briner, Jason Young, Nicolás Lesnek, Alia Cuzzone, Josh Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum |
topic_facet |
article Verlagsveröffentlichung |
description |
We investigate changing precipitation patterns in the Kangerlussuaq region of western central Greenland during the Holocene thermal maximum (HTM), using a new chronology of ice sheet terminus position through the Holocene and a novel inverse modeling approach based on the unscented transform (UT). The UT is applied to estimate changes in annual precipitation in order to reduce the misfit between modeled and observed terminus positions. We demonstrate the effectiveness of the UT for time-dependent data assimilation, highlighting its low computational cost and trivial parallel implementation. Our results indicate that Holocene warming coincided with elevated precipitation, without which modeled retreat in the Kangerlussuaq region is more rapid than suggested by observations. Less conclusive is whether high temperatures during the HTM were specifically associated with a transient increase in precipitation, as the results depend on the assumed temperature history. Our results highlight the important role that changing precipitation patterns had in controlling ice sheet extent during the Holocene. |
format |
Article in Journal/Newspaper |
author |
Downs, Jacob Johnson, Jesse Briner, Jason Young, Nicolás Lesnek, Alia Cuzzone, Josh |
author_facet |
Downs, Jacob Johnson, Jesse Briner, Jason Young, Nicolás Lesnek, Alia Cuzzone, Josh |
author_sort |
Downs, Jacob |
title |
Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum |
title_short |
Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum |
title_full |
Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum |
title_fullStr |
Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum |
title_full_unstemmed |
Western Greenland ice sheet retreat history reveals elevated precipitation during the Holocene thermal maximum |
title_sort |
western greenland ice sheet retreat history reveals elevated precipitation during the holocene thermal maximum |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-1121-2020 https://noa.gwlb.de/receive/cop_mods_00051069 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050726/tc-14-1121-2020.pdf https://tc.copernicus.org/articles/14/1121/2020/tc-14-1121-2020.pdf |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Greenland Kangerlussuaq |
geographic_facet |
Greenland Kangerlussuaq |
genre |
Greenland Ice Sheet Kangerlussuaq The Cryosphere |
genre_facet |
Greenland Ice Sheet Kangerlussuaq The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-14-1121-2020 https://noa.gwlb.de/receive/cop_mods_00051069 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050726/tc-14-1121-2020.pdf https://tc.copernicus.org/articles/14/1121/2020/tc-14-1121-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-14-1121-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
3 |
container_start_page |
1121 |
op_container_end_page |
1137 |
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1766016629076918272 |