The impacts of El Niño on the observed sea ice budget of West Antarctica
We assess the impact of El Niño-induced wind changes on seasonal West Antarctic sea ice concentrations using reanalysis data and sea ice observations. A novel ice budget analysis reveals that in autumn a previously identified east-west dipole of sea ice concentration anomalies is formed by dynamic a...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2017
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ftnerc:oai:nora.nerc.ac.uk:517131 2023-05-15T13:49:34+02:00 The impacts of El Niño on the observed sea ice budget of West Antarctica Pope, James O. Holland, Paul R. Orr, Andrew Marshall, Gareth J. Phillips, Tony 2017-06-28 text http://nora.nerc.ac.uk/id/eprint/517131/ https://nora.nerc.ac.uk/id/eprint/517131/1/Pope_et_al-2017-Geophysical_Research_Letters.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2017GL073414/abstract en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/517131/1/Pope_et_al-2017-Geophysical_Research_Letters.pdf Pope, James O. orcid:0000-0001-8945-4209 Holland, Paul R. orcid:0000-0001-8370-289X Orr, Andrew orcid:0000-0001-5111-8402 Marshall, Gareth J. orcid:0000-0001-8887-7314 Phillips, Tony orcid:0000-0002-3058-9157 . 2017 The impacts of El Niño on the observed sea ice budget of West Antarctica. Geophysical Research Letters, 44 (12). 6200-6208. https://doi.org/10.1002/2017GL073414 <https://doi.org/10.1002/2017GL073414> Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1002/2017GL073414 2023-02-04T19:44:58Z We assess the impact of El Niño-induced wind changes on seasonal West Antarctic sea ice concentrations using reanalysis data and sea ice observations. A novel ice budget analysis reveals that in autumn a previously identified east-west dipole of sea ice concentration anomalies is formed by dynamic and thermodynamic processes in response to El Niño-generated circulation changes. The dipole features decreased (increased) concentration in the Ross Sea (Amundsen and Bellingshausen Seas). Thermodynamic processes and feedback make a substantial contribution to ice anomalies in all seasons. The eastward propagation of this anomaly is partly driven by mean sea ice drift rather than anomalous winds. Our results demonstrate that linkages between sea ice anomalies and atmospheric variability are highly nonlocal in space and time. Therefore, we assert that caution should be applied when interpreting the results of studies that attribute sea ice changes without accounting for such temporally and spatially remote linkages. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Sea ice West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic Ross Sea West Antarctica Geophysical Research Letters 44 12 6200 6208 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
We assess the impact of El Niño-induced wind changes on seasonal West Antarctic sea ice concentrations using reanalysis data and sea ice observations. A novel ice budget analysis reveals that in autumn a previously identified east-west dipole of sea ice concentration anomalies is formed by dynamic and thermodynamic processes in response to El Niño-generated circulation changes. The dipole features decreased (increased) concentration in the Ross Sea (Amundsen and Bellingshausen Seas). Thermodynamic processes and feedback make a substantial contribution to ice anomalies in all seasons. The eastward propagation of this anomaly is partly driven by mean sea ice drift rather than anomalous winds. Our results demonstrate that linkages between sea ice anomalies and atmospheric variability are highly nonlocal in space and time. Therefore, we assert that caution should be applied when interpreting the results of studies that attribute sea ice changes without accounting for such temporally and spatially remote linkages. |
format |
Article in Journal/Newspaper |
author |
Pope, James O. Holland, Paul R. Orr, Andrew Marshall, Gareth J. Phillips, Tony |
spellingShingle |
Pope, James O. Holland, Paul R. Orr, Andrew Marshall, Gareth J. Phillips, Tony The impacts of El Niño on the observed sea ice budget of West Antarctica |
author_facet |
Pope, James O. Holland, Paul R. Orr, Andrew Marshall, Gareth J. Phillips, Tony |
author_sort |
Pope, James O. |
title |
The impacts of El Niño on the observed sea ice budget of West Antarctica |
title_short |
The impacts of El Niño on the observed sea ice budget of West Antarctica |
title_full |
The impacts of El Niño on the observed sea ice budget of West Antarctica |
title_fullStr |
The impacts of El Niño on the observed sea ice budget of West Antarctica |
title_full_unstemmed |
The impacts of El Niño on the observed sea ice budget of West Antarctica |
title_sort |
impacts of el niño on the observed sea ice budget of west antarctica |
publisher |
American Geophysical Union |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/517131/ https://nora.nerc.ac.uk/id/eprint/517131/1/Pope_et_al-2017-Geophysical_Research_Letters.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2017GL073414/abstract |
geographic |
Antarctic Ross Sea West Antarctica |
geographic_facet |
Antarctic Ross Sea West Antarctica |
genre |
Antarc* Antarctic Antarctica Ross Sea Sea ice West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Sea ice West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/517131/1/Pope_et_al-2017-Geophysical_Research_Letters.pdf Pope, James O. orcid:0000-0001-8945-4209 Holland, Paul R. orcid:0000-0001-8370-289X Orr, Andrew orcid:0000-0001-5111-8402 Marshall, Gareth J. orcid:0000-0001-8887-7314 Phillips, Tony orcid:0000-0002-3058-9157 . 2017 The impacts of El Niño on the observed sea ice budget of West Antarctica. Geophysical Research Letters, 44 (12). 6200-6208. https://doi.org/10.1002/2017GL073414 <https://doi.org/10.1002/2017GL073414> |
op_doi |
https://doi.org/10.1002/2017GL073414 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
12 |
container_start_page |
6200 |
op_container_end_page |
6208 |
_version_ |
1766251662875295744 |