Antarctic climate signature in the Greenland ice core record
A numerical algorithm is applied to the Greenland Ice Sheet Project 2 (GISP2) dust record from Greenland to remove the abrupt changes in dust flux associated with the Dansgaard–Oeschger (D–O) oscillations of the last glacial period. The procedure is based on the assumption that the rapid changes in...
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National Academy of Sciences
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/1365/ https://doi.org/10.1073/pnas.0708494104 |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:1365 2023-05-15T13:39:21+02:00 Antarctic climate signature in the Greenland ice core record Barker, Stephen Knorr, Gregor 2007-10-30 https://orca.cardiff.ac.uk/id/eprint/1365/ https://doi.org/10.1073/pnas.0708494104 unknown National Academy of Sciences Barker, Stephen https://orca.cardiff.ac.uk/view/cardiffauthors/A015364W.html orcid:0000-0001-7870-6431 orcid:0000-0001-7870-6431 and Knorr, Gregor https://orca.cardiff.ac.uk/view/cardiffauthors/A023108P.html 2007. Antarctic climate signature in the Greenland ice core record. Proceedings of the National Academy of Sciences 104 (44) , pp. 17278-17282. 10.1073/pnas.0708494104 https://doi.org/10.1073/pnas.0708494104 doi:10.1073/pnas.0708494104 GC Oceanography QE Geology Article PeerReviewed 2007 ftunivcardiff https://doi.org/10.1073/pnas.0708494104 2022-10-20T22:31:56Z A numerical algorithm is applied to the Greenland Ice Sheet Project 2 (GISP2) dust record from Greenland to remove the abrupt changes in dust flux associated with the Dansgaard–Oeschger (D–O) oscillations of the last glacial period. The procedure is based on the assumption that the rapid changes in dust are associated with large-scale changes in atmospheric transport and implies that D–O oscillations (in terms of their atmospheric imprint) are more symmetric in form than can be inferred from Greenland temperature records. After removal of the abrupt shifts the residual, dejumped dust record is found to match Antarctic climate variability with a temporal lag of several hundred years. It is argued that such variability may reflect changes in the source region of Greenland dust (thought to be the deserts of eastern Asia). Other records from this region and more globally also reveal Antarctic-style variability and suggest that this signal is globally pervasive. This provides the potential basis for suggesting a more important role for gradual changes in triggering more abrupt transitions in the climate system. Article in Journal/Newspaper Antarc* Antarctic Greenland Greenland ice core Greenland Ice Sheet Project ice core Ice Sheet Cardiff University: ORCA (Online Research @ Cardiff) Antarctic Greenland Proceedings of the National Academy of Sciences 104 44 17278 17282 |
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Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
GC Oceanography QE Geology |
spellingShingle |
GC Oceanography QE Geology Barker, Stephen Knorr, Gregor Antarctic climate signature in the Greenland ice core record |
topic_facet |
GC Oceanography QE Geology |
description |
A numerical algorithm is applied to the Greenland Ice Sheet Project 2 (GISP2) dust record from Greenland to remove the abrupt changes in dust flux associated with the Dansgaard–Oeschger (D–O) oscillations of the last glacial period. The procedure is based on the assumption that the rapid changes in dust are associated with large-scale changes in atmospheric transport and implies that D–O oscillations (in terms of their atmospheric imprint) are more symmetric in form than can be inferred from Greenland temperature records. After removal of the abrupt shifts the residual, dejumped dust record is found to match Antarctic climate variability with a temporal lag of several hundred years. It is argued that such variability may reflect changes in the source region of Greenland dust (thought to be the deserts of eastern Asia). Other records from this region and more globally also reveal Antarctic-style variability and suggest that this signal is globally pervasive. This provides the potential basis for suggesting a more important role for gradual changes in triggering more abrupt transitions in the climate system. |
format |
Article in Journal/Newspaper |
author |
Barker, Stephen Knorr, Gregor |
author_facet |
Barker, Stephen Knorr, Gregor |
author_sort |
Barker, Stephen |
title |
Antarctic climate signature in the Greenland ice core record |
title_short |
Antarctic climate signature in the Greenland ice core record |
title_full |
Antarctic climate signature in the Greenland ice core record |
title_fullStr |
Antarctic climate signature in the Greenland ice core record |
title_full_unstemmed |
Antarctic climate signature in the Greenland ice core record |
title_sort |
antarctic climate signature in the greenland ice core record |
publisher |
National Academy of Sciences |
publishDate |
2007 |
url |
https://orca.cardiff.ac.uk/id/eprint/1365/ https://doi.org/10.1073/pnas.0708494104 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Greenland Greenland ice core Greenland Ice Sheet Project ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Greenland Greenland ice core Greenland Ice Sheet Project ice core Ice Sheet |
op_relation |
Barker, Stephen https://orca.cardiff.ac.uk/view/cardiffauthors/A015364W.html orcid:0000-0001-7870-6431 orcid:0000-0001-7870-6431 and Knorr, Gregor https://orca.cardiff.ac.uk/view/cardiffauthors/A023108P.html 2007. Antarctic climate signature in the Greenland ice core record. Proceedings of the National Academy of Sciences 104 (44) , pp. 17278-17282. 10.1073/pnas.0708494104 https://doi.org/10.1073/pnas.0708494104 doi:10.1073/pnas.0708494104 |
op_doi |
https://doi.org/10.1073/pnas.0708494104 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
104 |
container_issue |
44 |
container_start_page |
17278 |
op_container_end_page |
17282 |
_version_ |
1766117658598572032 |