Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica
The spatial and temporal distribution of surface mass balance (SMB) and δ18O were investigated in the first comprehensive study of a set of 76 firn cores retrieved by various expeditions during the past 3 decades in Dronning Maud Land, East Antarctica. The large number of cores was used to calculate...
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2015
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00016597 2023-05-15T13:41:02+02:00 Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica Altnau, S. Schlosser, E. Isaksson, E. Divine, D. 2015-05 electronic https://doi.org/10.5194/tc-9-925-2015 https://noa.gwlb.de/receive/cop_mods_00016597 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016552/tc-9-925-2015.pdf https://tc.copernicus.org/articles/9/925/2015/tc-9-925-2015.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-9-925-2015 https://noa.gwlb.de/receive/cop_mods_00016597 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016552/tc-9-925-2015.pdf https://tc.copernicus.org/articles/9/925/2015/tc-9-925-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/tc-9-925-2015 2022-02-08T22:54:04Z The spatial and temporal distribution of surface mass balance (SMB) and δ18O were investigated in the first comprehensive study of a set of 76 firn cores retrieved by various expeditions during the past 3 decades in Dronning Maud Land, East Antarctica. The large number of cores was used to calculate stacked records of SMB and δ18O, which considerably increased the signal-to-noise ratio compared to earlier studies and facilitated the detection of climatic signals. Considerable differences between cores from the interior plateau and the coastal cores were found. The δ18O of both the plateau and the ice shelf cores exhibit a slight positive trend over the second half of the 20th century. In the corresponding period, the SMB has a negative trend in the ice shelf cores, but increases on the plateau. Comparison with meteorological data from Neumayer Station revealed that for the ice shelf regions, atmospheric dynamic effects are more important than thermodynamics while on the plateau; the temporal variations of SMB and δ18O occur mostly in parallel, and thus can be explained by thermodynamic effects. The Southern Annular Mode (SAM) has exhibited a positive trend since the mid-1960s, which is assumed to lead to a cooling of East Antarctica. This is not confirmed by the firn core data in our data set. Changes in the atmospheric circulation that result in a changed seasonal distribution of precipitation/accumulation could partly explain the observed features in the ice shelf cores. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land East Antarctica Ice Shelf The Cryosphere Niedersächsisches Online-Archiv NOA Dronning Maud Land East Antarctica Neumayer Neumayer Station The Cryosphere 9 3 925 944 |
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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 Altnau, S. Schlosser, E. Isaksson, E. Divine, D. Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
The spatial and temporal distribution of surface mass balance (SMB) and δ18O were investigated in the first comprehensive study of a set of 76 firn cores retrieved by various expeditions during the past 3 decades in Dronning Maud Land, East Antarctica. The large number of cores was used to calculate stacked records of SMB and δ18O, which considerably increased the signal-to-noise ratio compared to earlier studies and facilitated the detection of climatic signals. Considerable differences between cores from the interior plateau and the coastal cores were found. The δ18O of both the plateau and the ice shelf cores exhibit a slight positive trend over the second half of the 20th century. In the corresponding period, the SMB has a negative trend in the ice shelf cores, but increases on the plateau. Comparison with meteorological data from Neumayer Station revealed that for the ice shelf regions, atmospheric dynamic effects are more important than thermodynamics while on the plateau; the temporal variations of SMB and δ18O occur mostly in parallel, and thus can be explained by thermodynamic effects. The Southern Annular Mode (SAM) has exhibited a positive trend since the mid-1960s, which is assumed to lead to a cooling of East Antarctica. This is not confirmed by the firn core data in our data set. Changes in the atmospheric circulation that result in a changed seasonal distribution of precipitation/accumulation could partly explain the observed features in the ice shelf cores. |
format |
Article in Journal/Newspaper |
author |
Altnau, S. Schlosser, E. Isaksson, E. Divine, D. |
author_facet |
Altnau, S. Schlosser, E. Isaksson, E. Divine, D. |
author_sort |
Altnau, S. |
title |
Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica |
title_short |
Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica |
title_full |
Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica |
title_fullStr |
Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Climatic signals from 76 shallow firn cores in Dronning Maud Land, East Antarctica |
title_sort |
climatic signals from 76 shallow firn cores in dronning maud land, east antarctica |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-925-2015 https://noa.gwlb.de/receive/cop_mods_00016597 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016552/tc-9-925-2015.pdf https://tc.copernicus.org/articles/9/925/2015/tc-9-925-2015.pdf |
geographic |
Dronning Maud Land East Antarctica Neumayer Neumayer Station |
geographic_facet |
Dronning Maud Land East Antarctica Neumayer Neumayer Station |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica Ice Shelf The Cryosphere |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica Ice Shelf 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-9-925-2015 https://noa.gwlb.de/receive/cop_mods_00016597 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016552/tc-9-925-2015.pdf https://tc.copernicus.org/articles/9/925/2015/tc-9-925-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-9-925-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
3 |
container_start_page |
925 |
op_container_end_page |
944 |
_version_ |
1766144968576991232 |