Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica
Ice core records of methanesulfonic acid (MSA) from three sites around the Weddell Sea are investigated for their potential as sea ice proxies. It is found that the amount of MSA reaching the ice core sites decreases following years of increased winter sea ice in the Weddell Sea; opposite to the exp...
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American Geophysical Union
2007
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ftnerc:oai:nora.nerc.ac.uk:1067 2024-06-09T07:41:07+00:00 Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica Abram, Nerilie J Mulvaney, Robert Wolff, Eric W. Mudelsee, Manfred 2007 text http://nora.nerc.ac.uk/id/eprint/1067/ https://nora.nerc.ac.uk/id/eprint/1067/1/Abram2007_JGR_accepted.pdf http://www.agu.org/pubs/crossref/2007/2006JD008139.shtml https://doi.org/10.1029/2006JD008139 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/1067/1/Abram2007_JGR_accepted.pdf Abram, Nerilie J; Mulvaney, Robert orcid:0000-0002-5372-8148 Wolff, Eric W.; Mudelsee, Manfred. 2007 Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica. Journal of Geophysical Research, 112 (D15), D15101. 13, pp. https://doi.org/10.1029/2006JD008139 <https://doi.org/10.1029/2006JD008139> Glaciology Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1029/2006JD008139 2024-05-15T08:39:04Z Ice core records of methanesulfonic acid (MSA) from three sites around the Weddell Sea are investigated for their potential as sea ice proxies. It is found that the amount of MSA reaching the ice core sites decreases following years of increased winter sea ice in the Weddell Sea; opposite to the expected relationship if MSA is to be used as a sea ice proxy. It is also shown that this negative MSA-sea ice relationship cannot be explained by the influence that the extensive summer ice pack in the Weddell Sea has on MSA production area and transport distance. A historical record of sea ice from the northern Weddell Sea shows that the negative relationship between MSA and winter sea ice exists over interannual (7-year period) and multidecadal (20-year period) timescales. National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis data suggest that this negative relationship is most likely due to variations in the strength of cold offshore wind anomalies traveling across the Weddell Sea, which act to synergistically increase sea ice extent (SIE) while decreasing MSA delivery to the ice core sites. Hence our findings show that in some locations atmospheric transport strength, rather than sea ice conditions, is the dominant factor that determines the MSA signal preserved in near-coastal ice cores. A cautious approach is thus required in using ice core MSA for reconstructing past sea ice conditions, including the need for networks of ice core records and multiproxy studies to assess the significance of past MSA changes at different locations around Antarctica. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal ice core ice pack Sea ice Weddell Sea Natural Environment Research Council: NERC Open Research Archive Weddell Weddell Sea Journal of Geophysical Research 112 D15 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Glaciology |
spellingShingle |
Glaciology Abram, Nerilie J Mulvaney, Robert Wolff, Eric W. Mudelsee, Manfred Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica |
topic_facet |
Glaciology |
description |
Ice core records of methanesulfonic acid (MSA) from three sites around the Weddell Sea are investigated for their potential as sea ice proxies. It is found that the amount of MSA reaching the ice core sites decreases following years of increased winter sea ice in the Weddell Sea; opposite to the expected relationship if MSA is to be used as a sea ice proxy. It is also shown that this negative MSA-sea ice relationship cannot be explained by the influence that the extensive summer ice pack in the Weddell Sea has on MSA production area and transport distance. A historical record of sea ice from the northern Weddell Sea shows that the negative relationship between MSA and winter sea ice exists over interannual (7-year period) and multidecadal (20-year period) timescales. National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis data suggest that this negative relationship is most likely due to variations in the strength of cold offshore wind anomalies traveling across the Weddell Sea, which act to synergistically increase sea ice extent (SIE) while decreasing MSA delivery to the ice core sites. Hence our findings show that in some locations atmospheric transport strength, rather than sea ice conditions, is the dominant factor that determines the MSA signal preserved in near-coastal ice cores. A cautious approach is thus required in using ice core MSA for reconstructing past sea ice conditions, including the need for networks of ice core records and multiproxy studies to assess the significance of past MSA changes at different locations around Antarctica. |
format |
Article in Journal/Newspaper |
author |
Abram, Nerilie J Mulvaney, Robert Wolff, Eric W. Mudelsee, Manfred |
author_facet |
Abram, Nerilie J Mulvaney, Robert Wolff, Eric W. Mudelsee, Manfred |
author_sort |
Abram, Nerilie J |
title |
Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica |
title_short |
Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica |
title_full |
Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica |
title_fullStr |
Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica |
title_full_unstemmed |
Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica |
title_sort |
ice core records as sea ice proxies: an evaluation from the weddell sea region of antarctica |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/1067/ https://nora.nerc.ac.uk/id/eprint/1067/1/Abram2007_JGR_accepted.pdf http://www.agu.org/pubs/crossref/2007/2006JD008139.shtml https://doi.org/10.1029/2006JD008139 |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
Antarc* Antarctica Antarctica Journal ice core ice pack Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctica Antarctica Journal ice core ice pack Sea ice Weddell Sea |
op_relation |
https://nora.nerc.ac.uk/id/eprint/1067/1/Abram2007_JGR_accepted.pdf Abram, Nerilie J; Mulvaney, Robert orcid:0000-0002-5372-8148 Wolff, Eric W.; Mudelsee, Manfred. 2007 Ice core records as sea ice proxies: An evaluation from the Weddell Sea region of Antarctica. Journal of Geophysical Research, 112 (D15), D15101. 13, pp. https://doi.org/10.1029/2006JD008139 <https://doi.org/10.1029/2006JD008139> |
op_doi |
https://doi.org/10.1029/2006JD008139 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
D15 |
_version_ |
1801369544270282752 |