Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica
This study uses ice core methanesulphonic acid (MSA) records from the Antarctic Peninsula, where temperatures have been warming faster than anywhere else in the Southern Hemisphere, to reconstruct the 20th century history of sea ice change in the adjacent Bellingshausen Sea. Using satellite-derived...
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American Geophysical Union
2010
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ftnerc:oai:nora.nerc.ac.uk:13032 2023-05-15T13:24:10+02:00 Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica Abram, Nerilie J. Thomas, Elizabeth R. McConnell, Joseph R. Mulvaney, Robert Bracegirdle, Thomas J. Sime, Louise C. Aristarain, Alberto J. 2010-12-16 text http://nora.nerc.ac.uk/id/eprint/13032/ https://nora.nerc.ac.uk/id/eprint/13032/1/jgrd16699.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010JD014644 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/13032/1/jgrd16699.pdf Abram, Nerilie J.; Thomas, Elizabeth R. orcid:0000-0002-3010-6493 McConnell, Joseph R.; Mulvaney, Robert orcid:0000-0002-5372-8148 Bracegirdle, Thomas J. orcid:0000-0002-8868-4739 Sime, Louise C. orcid:0000-0002-9093-7926 Aristarain, Alberto J. 2010 Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica. Journal of Geophysical Research, 115 (D23), D23101. 9, pp. https://doi.org/10.1029/2010JD014644 <https://doi.org/10.1029/2010JD014644> Glaciology Chemistry Atmospheric Sciences Publication - Article PeerReviewed 2010 ftnerc https://doi.org/10.1029/2010JD014644 2023-02-04T19:28:22Z This study uses ice core methanesulphonic acid (MSA) records from the Antarctic Peninsula, where temperatures have been warming faster than anywhere else in the Southern Hemisphere, to reconstruct the 20th century history of sea ice change in the adjacent Bellingshausen Sea. Using satellite-derived sea ice and meteorological data, we show that ice core MSA records from this region are a reliable proxy for regional sea ice change, with years of increased winter sea ice extent recorded by increased ice core MSA concentrations. Our reconstruction suggests that the satellite-observed sea ice decline in the Bellingshausen Sea during recent decades is part of a long-term regional trend that has occurred throughout the 20th century. The long-term perspective on sea ice in the Bellingshausen Sea is consistent with evidence of 20th century warming on the Antarctic Peninsula and may reflect a progressive deepening of the Amundsen Sea Low due to increasing greenhouse gas concentrations and, more recently, stratospheric ozone depletion. As a first-order estimate, our MSA-based reconstruction suggests that sea ice in the Bellingshausen Sea has retreated southward by ~0.7° during the 20th century. Comparison with other 20th century sea ice observations, reconstructions, and model simulations provides a coherent picture of Antarctic sea ice decline during the 20th century, although with regional-scale differences evident in the timing and magnitude of this sea ice decline. This longer-term perspective contrasts with the small overall increase in Antarctic sea ice that is observed in post-1979 satellite data. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal Bellingshausen Sea ice core Sea ice Natural Environment Research Council: NERC Open Research Archive Amundsen Sea Antarctic Antarctic Peninsula Bellingshausen Sea The Antarctic Journal of Geophysical Research 115 D23 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Glaciology Chemistry Atmospheric Sciences |
spellingShingle |
Glaciology Chemistry Atmospheric Sciences Abram, Nerilie J. Thomas, Elizabeth R. McConnell, Joseph R. Mulvaney, Robert Bracegirdle, Thomas J. Sime, Louise C. Aristarain, Alberto J. Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica |
topic_facet |
Glaciology Chemistry Atmospheric Sciences |
description |
This study uses ice core methanesulphonic acid (MSA) records from the Antarctic Peninsula, where temperatures have been warming faster than anywhere else in the Southern Hemisphere, to reconstruct the 20th century history of sea ice change in the adjacent Bellingshausen Sea. Using satellite-derived sea ice and meteorological data, we show that ice core MSA records from this region are a reliable proxy for regional sea ice change, with years of increased winter sea ice extent recorded by increased ice core MSA concentrations. Our reconstruction suggests that the satellite-observed sea ice decline in the Bellingshausen Sea during recent decades is part of a long-term regional trend that has occurred throughout the 20th century. The long-term perspective on sea ice in the Bellingshausen Sea is consistent with evidence of 20th century warming on the Antarctic Peninsula and may reflect a progressive deepening of the Amundsen Sea Low due to increasing greenhouse gas concentrations and, more recently, stratospheric ozone depletion. As a first-order estimate, our MSA-based reconstruction suggests that sea ice in the Bellingshausen Sea has retreated southward by ~0.7° during the 20th century. Comparison with other 20th century sea ice observations, reconstructions, and model simulations provides a coherent picture of Antarctic sea ice decline during the 20th century, although with regional-scale differences evident in the timing and magnitude of this sea ice decline. This longer-term perspective contrasts with the small overall increase in Antarctic sea ice that is observed in post-1979 satellite data. |
format |
Article in Journal/Newspaper |
author |
Abram, Nerilie J. Thomas, Elizabeth R. McConnell, Joseph R. Mulvaney, Robert Bracegirdle, Thomas J. Sime, Louise C. Aristarain, Alberto J. |
author_facet |
Abram, Nerilie J. Thomas, Elizabeth R. McConnell, Joseph R. Mulvaney, Robert Bracegirdle, Thomas J. Sime, Louise C. Aristarain, Alberto J. |
author_sort |
Abram, Nerilie J. |
title |
Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica |
title_short |
Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica |
title_full |
Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica |
title_fullStr |
Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica |
title_full_unstemmed |
Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica |
title_sort |
ice core evidence for a 20th century decline in sea ice in the bellingshausen sea, antarctica |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
http://nora.nerc.ac.uk/id/eprint/13032/ https://nora.nerc.ac.uk/id/eprint/13032/1/jgrd16699.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010JD014644 |
geographic |
Amundsen Sea Antarctic Antarctic Peninsula Bellingshausen Sea The Antarctic |
geographic_facet |
Amundsen Sea Antarctic Antarctic Peninsula Bellingshausen Sea The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal Bellingshausen Sea ice core Sea ice |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal Bellingshausen Sea ice core Sea ice |
op_relation |
https://nora.nerc.ac.uk/id/eprint/13032/1/jgrd16699.pdf Abram, Nerilie J.; Thomas, Elizabeth R. orcid:0000-0002-3010-6493 McConnell, Joseph R.; Mulvaney, Robert orcid:0000-0002-5372-8148 Bracegirdle, Thomas J. orcid:0000-0002-8868-4739 Sime, Louise C. orcid:0000-0002-9093-7926 Aristarain, Alberto J. 2010 Ice core evidence for a 20th century decline in sea ice in the Bellingshausen Sea, Antarctica. Journal of Geophysical Research, 115 (D23), D23101. 9, pp. https://doi.org/10.1029/2010JD014644 <https://doi.org/10.1029/2010JD014644> |
op_doi |
https://doi.org/10.1029/2010JD014644 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
D23 |
_version_ |
1766377824444219392 |