340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core
Precipitation delivery mechanisms for Dolleman Island (DI), located off the east coast of the Antarctic Peninsula, are investigated using reanalysis and back trajectory data. The Southern Annular Mode (SAM) and ENSO are both shown to influence precipitation delivery and event size. Precipitation del...
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American Geophysical Union
2006
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ftnerc:oai:nora.nerc.ac.uk:114 2024-06-09T07:41:07+00:00 340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core Russell, A. McGregor, G.R. Marshall, G.J. 2006 http://nora.nerc.ac.uk/id/eprint/114/ unknown American Geophysical Union Russell, A.; McGregor, G.R.; Marshall, G.J. orcid:0000-0001-8887-7314 . 2006 340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core. Geophysical Research Letters, 33 (8), L08702. 4, pp. https://doi.org/10.1029/2006GL025899 <https://doi.org/10.1029/2006GL025899> Meteorology and Climatology Atmospheric Sciences Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1029/2006GL025899 2024-05-15T08:39:04Z Precipitation delivery mechanisms for Dolleman Island (DI), located off the east coast of the Antarctic Peninsula, are investigated using reanalysis and back trajectory data. The Southern Annular Mode (SAM) and ENSO are both shown to influence precipitation delivery and event size. Precipitation delivery variability is compared against the interannual variation of chemical data from two DI ice cores. Nitrate concentration in the cores is strongly linked with the ratio of easterly to westerly back trajectories arriving at DI, as described by a Cross-Peninsula Index (CPI) defined in this paper. This CPI is used subsequently to reconstruct the atmospheric circulation characteristics for the 340-year ice core record. The analysis highlights a period of increased easterlies during 1720–1780 and an increase in westerlies for 1950–1980, the latter concomitant with a positive SAM trend and western Peninsula warming. The reconstruction also reveals periods when polynyas may have been present in the Weddell Sea. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Dolleman Island ice core Weddell Sea Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Dolleman ENVELOPE(-60.733,-60.733,-70.616,-70.616) Dolleman Island ENVELOPE(-60.750,-60.750,-70.667,-70.667) The Antarctic Weddell Weddell Sea Geophysical Research Letters 33 8 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Meteorology and Climatology Atmospheric Sciences |
spellingShingle |
Meteorology and Climatology Atmospheric Sciences Russell, A. McGregor, G.R. Marshall, G.J. 340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core |
topic_facet |
Meteorology and Climatology Atmospheric Sciences |
description |
Precipitation delivery mechanisms for Dolleman Island (DI), located off the east coast of the Antarctic Peninsula, are investigated using reanalysis and back trajectory data. The Southern Annular Mode (SAM) and ENSO are both shown to influence precipitation delivery and event size. Precipitation delivery variability is compared against the interannual variation of chemical data from two DI ice cores. Nitrate concentration in the cores is strongly linked with the ratio of easterly to westerly back trajectories arriving at DI, as described by a Cross-Peninsula Index (CPI) defined in this paper. This CPI is used subsequently to reconstruct the atmospheric circulation characteristics for the 340-year ice core record. The analysis highlights a period of increased easterlies during 1720–1780 and an increase in westerlies for 1950–1980, the latter concomitant with a positive SAM trend and western Peninsula warming. The reconstruction also reveals periods when polynyas may have been present in the Weddell Sea. |
format |
Article in Journal/Newspaper |
author |
Russell, A. McGregor, G.R. Marshall, G.J. |
author_facet |
Russell, A. McGregor, G.R. Marshall, G.J. |
author_sort |
Russell, A. |
title |
340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core |
title_short |
340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core |
title_full |
340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core |
title_fullStr |
340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core |
title_full_unstemmed |
340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core |
title_sort |
340 years of atmospheric circulation characteristics reconstructed from an eastern antarctic peninsula ice core |
publisher |
American Geophysical Union |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/114/ |
long_lat |
ENVELOPE(-60.733,-60.733,-70.616,-70.616) ENVELOPE(-60.750,-60.750,-70.667,-70.667) |
geographic |
Antarctic Antarctic Peninsula Dolleman Dolleman Island The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Dolleman Dolleman Island The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Dolleman Island ice core Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Dolleman Island ice core Weddell Sea |
op_relation |
Russell, A.; McGregor, G.R.; Marshall, G.J. orcid:0000-0001-8887-7314 . 2006 340 years of atmospheric circulation characteristics reconstructed from an eastern Antarctic Peninsula ice core. Geophysical Research Letters, 33 (8), L08702. 4, pp. https://doi.org/10.1029/2006GL025899 <https://doi.org/10.1029/2006GL025899> |
op_doi |
https://doi.org/10.1029/2006GL025899 |
container_title |
Geophysical Research Letters |
container_volume |
33 |
container_issue |
8 |
_version_ |
1801369545105997824 |