Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy
The Southern Hemisphere westerly winds are among the most important drivers of recently observed environmental changes in West Antarctica. However, the lack of long-term wind records in this region hinders our ability to assess the long-term context of these variations. Ice core proxy records yield...
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ftcopernicus:oai:publications.copernicus.org:cp96265 2023-05-15T14:02:18+02:00 Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy Tetzner, Dieter R. Thomas, Elizabeth R. Allen, Claire S. Grieman, Mackenzie M. 2022-07-21 application/pdf https://doi.org/10.5194/cp-18-1709-2022 https://cp.copernicus.org/articles/18/1709/2022/ eng eng doi:10.5194/cp-18-1709-2022 https://cp.copernicus.org/articles/18/1709/2022/ eISSN: 1814-9332 Text 2022 ftcopernicus https://doi.org/10.5194/cp-18-1709-2022 2022-07-25T16:22:41Z The Southern Hemisphere westerly winds are among the most important drivers of recently observed environmental changes in West Antarctica. However, the lack of long-term wind records in this region hinders our ability to assess the long-term context of these variations. Ice core proxy records yield valuable information about past environmental changes, although current proxies present limitations when aiming to reconstruct past winds. Here we present the first regional wind study based on the novel use of diatoms preserved in Antarctic ice cores. We assess the temporal variability in diatom abundance and its relation to regional environmental parameters spanning a 20-year period across three sites in the southern Antarctic Peninsula and Ellsworth Land, Antarctica. Correlation analyses reveal that the temporal variability of diatom abundance from high-elevation ice core sites is driven by changes in wind strength over the core of the Southern Hemisphere westerly wind belt, validating the use of diatoms preserved in ice cores from high-elevation inland sites in the southern Antarctic Peninsula and Ellsworth Land as a proxy for reconstructing past variations in wind strength over the Pacific sector of the Southern Hemisphere westerly wind belt. Text Antarc* Antarctic Antarctic Peninsula Antarctica ice core West Antarctica Copernicus Publications: E-Journals Antarctic Antarctic Peninsula Ellsworth Land ENVELOPE(-85.000,-85.000,-75.000,-75.000) Pacific The Antarctic West Antarctica Climate of the Past 18 7 1709 1727 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The Southern Hemisphere westerly winds are among the most important drivers of recently observed environmental changes in West Antarctica. However, the lack of long-term wind records in this region hinders our ability to assess the long-term context of these variations. Ice core proxy records yield valuable information about past environmental changes, although current proxies present limitations when aiming to reconstruct past winds. Here we present the first regional wind study based on the novel use of diatoms preserved in Antarctic ice cores. We assess the temporal variability in diatom abundance and its relation to regional environmental parameters spanning a 20-year period across three sites in the southern Antarctic Peninsula and Ellsworth Land, Antarctica. Correlation analyses reveal that the temporal variability of diatom abundance from high-elevation ice core sites is driven by changes in wind strength over the core of the Southern Hemisphere westerly wind belt, validating the use of diatoms preserved in ice cores from high-elevation inland sites in the southern Antarctic Peninsula and Ellsworth Land as a proxy for reconstructing past variations in wind strength over the Pacific sector of the Southern Hemisphere westerly wind belt. |
format |
Text |
author |
Tetzner, Dieter R. Thomas, Elizabeth R. Allen, Claire S. Grieman, Mackenzie M. |
spellingShingle |
Tetzner, Dieter R. Thomas, Elizabeth R. Allen, Claire S. Grieman, Mackenzie M. Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy |
author_facet |
Tetzner, Dieter R. Thomas, Elizabeth R. Allen, Claire S. Grieman, Mackenzie M. |
author_sort |
Tetzner, Dieter R. |
title |
Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy |
title_short |
Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy |
title_full |
Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy |
title_fullStr |
Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy |
title_full_unstemmed |
Regional validation of the use of diatoms in ice cores from the Antarctic Peninsula as a Southern Hemisphere westerly wind proxy |
title_sort |
regional validation of the use of diatoms in ice cores from the antarctic peninsula as a southern hemisphere westerly wind proxy |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-18-1709-2022 https://cp.copernicus.org/articles/18/1709/2022/ |
long_lat |
ENVELOPE(-85.000,-85.000,-75.000,-75.000) |
geographic |
Antarctic Antarctic Peninsula Ellsworth Land Pacific The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula Ellsworth Land Pacific The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica ice core West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica ice core West Antarctica |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-18-1709-2022 https://cp.copernicus.org/articles/18/1709/2022/ |
op_doi |
https://doi.org/10.5194/cp-18-1709-2022 |
container_title |
Climate of the Past |
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18 |
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7 |
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1709 |
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1727 |
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1766272507915010048 |