Environmental signals in a highly resolved ice core from James Ross Island, Antarctica
The accumulation, isotopic and chemical signals of an ice core from James Ross Island, Antarctica, are investigated for the interval from 1967 to 2008. Over this interval, comparison with station, satellite and reanalysis data allows for a detailed assessment of the environmental information preserv...
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American Geophysical Union
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ftnerc:oai:nora.nerc.ac.uk:15799 2023-05-15T13:45:11+02:00 Environmental signals in a highly resolved ice core from James Ross Island, Antarctica Abram, Nerilie J. Mulvaney, Robert Arrowsmith, Carol 2011-10-22 text http://nora.nerc.ac.uk/id/eprint/15799/ https://nora.nerc.ac.uk/id/eprint/15799/1/2011JD016147.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2011JD016147 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/15799/1/2011JD016147.pdf Abram, Nerilie J.; Mulvaney, Robert orcid:0000-0002-5372-8148 Arrowsmith, Carol. 2011 Environmental signals in a highly resolved ice core from James Ross Island, Antarctica. Journal of Geophysical Research, 116 (D20), D20116. 15, pp. https://doi.org/10.1029/2011JD016147 <https://doi.org/10.1029/2011JD016147> Publication - Article PeerReviewed 2011 ftnerc https://doi.org/10.1029/2011JD016147 2023-02-04T19:30:05Z The accumulation, isotopic and chemical signals of an ice core from James Ross Island, Antarctica, are investigated for the interval from 1967 to 2008. Over this interval, comparison with station, satellite and reanalysis data allows for a detailed assessment of the environmental information preserved in the ice. Accumulation at James Ross Island is enhanced during years when the circumpolar westerlies are weak, allowing more precipitation events to reach the northeastern Antarctic Peninsula. The stable water isotope composition of the ice core has an interannual temperature dependence consistent with the spatial isotopeātemperature gradient across Antarctica, and preserves information about both summer and winter temperature variability in the region. Sea salts in the ice core are derived from open water sources in the marginal sea ice zone to the north of James Ross Island and transported to the site by strengthened northerly and westerly winds in the winter. A strong covariance with temperature means that the sea salt record may be able to be utilized, in conjunction with the isotope signal, as an indicator of winter temperature. Marine biogenic compounds in the ice core are derived from summer productivity within the sea ice zone to the south of James Ross Island. This source region may have become significant only in recent decades, when the collapse of nearby ice shelves established new sites of open water with high summer productivity. These findings provide a foundation for interpreting the environmental signals in the James Ross Island ice core, which extends though the whole Holocene and represents the oldest ice core that has been recovered from the Antarctic Peninsula region. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal ice core Ice Shelves James Ross Island Ross Island Sea ice Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Ross Island The Antarctic Journal of Geophysical Research 116 D20 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The accumulation, isotopic and chemical signals of an ice core from James Ross Island, Antarctica, are investigated for the interval from 1967 to 2008. Over this interval, comparison with station, satellite and reanalysis data allows for a detailed assessment of the environmental information preserved in the ice. Accumulation at James Ross Island is enhanced during years when the circumpolar westerlies are weak, allowing more precipitation events to reach the northeastern Antarctic Peninsula. The stable water isotope composition of the ice core has an interannual temperature dependence consistent with the spatial isotopeātemperature gradient across Antarctica, and preserves information about both summer and winter temperature variability in the region. Sea salts in the ice core are derived from open water sources in the marginal sea ice zone to the north of James Ross Island and transported to the site by strengthened northerly and westerly winds in the winter. A strong covariance with temperature means that the sea salt record may be able to be utilized, in conjunction with the isotope signal, as an indicator of winter temperature. Marine biogenic compounds in the ice core are derived from summer productivity within the sea ice zone to the south of James Ross Island. This source region may have become significant only in recent decades, when the collapse of nearby ice shelves established new sites of open water with high summer productivity. These findings provide a foundation for interpreting the environmental signals in the James Ross Island ice core, which extends though the whole Holocene and represents the oldest ice core that has been recovered from the Antarctic Peninsula region. |
format |
Article in Journal/Newspaper |
author |
Abram, Nerilie J. Mulvaney, Robert Arrowsmith, Carol |
spellingShingle |
Abram, Nerilie J. Mulvaney, Robert Arrowsmith, Carol Environmental signals in a highly resolved ice core from James Ross Island, Antarctica |
author_facet |
Abram, Nerilie J. Mulvaney, Robert Arrowsmith, Carol |
author_sort |
Abram, Nerilie J. |
title |
Environmental signals in a highly resolved ice core from James Ross Island, Antarctica |
title_short |
Environmental signals in a highly resolved ice core from James Ross Island, Antarctica |
title_full |
Environmental signals in a highly resolved ice core from James Ross Island, Antarctica |
title_fullStr |
Environmental signals in a highly resolved ice core from James Ross Island, Antarctica |
title_full_unstemmed |
Environmental signals in a highly resolved ice core from James Ross Island, Antarctica |
title_sort |
environmental signals in a highly resolved ice core from james ross island, antarctica |
publisher |
American Geophysical Union |
publishDate |
2011 |
url |
http://nora.nerc.ac.uk/id/eprint/15799/ https://nora.nerc.ac.uk/id/eprint/15799/1/2011JD016147.pdf https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2011JD016147 |
geographic |
Antarctic Antarctic Peninsula Ross Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Ross Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal ice core Ice Shelves James Ross Island Ross Island Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Antarctica Journal ice core Ice Shelves James Ross Island Ross Island Sea ice |
op_relation |
https://nora.nerc.ac.uk/id/eprint/15799/1/2011JD016147.pdf Abram, Nerilie J.; Mulvaney, Robert orcid:0000-0002-5372-8148 Arrowsmith, Carol. 2011 Environmental signals in a highly resolved ice core from James Ross Island, Antarctica. Journal of Geophysical Research, 116 (D20), D20116. 15, pp. https://doi.org/10.1029/2011JD016147 <https://doi.org/10.1029/2011JD016147> |
op_doi |
https://doi.org/10.1029/2011JD016147 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
D20 |
_version_ |
1766215967261589504 |