On the feedback of the winter NAO-driven sea ice anomalies
Satellite-derived sea-ice concentration (SIC) and re-analysed atmospheric data are used to analyse the potential feedback of the North Atlantic Oscillation (NAO)-driven sea-ice anomalies in winter onto the atmosphere during 1979–2013. A maximum covariance analysis shows that this feedback can be det...
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Online Access: | https://doi.org/10.1007/s00382-015-2922-5 |
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ftzenodo:oai:zenodo.org:48716 2024-09-15T18:03:32+00:00 On the feedback of the winter NAO-driven sea ice anomalies García-Serrano, Javier Frankignoul, C. 2015-11-28 https://doi.org/10.1007/s00382-015-2922-5 unknown Zenodo https://zenodo.org/communities/naclim https://zenodo.org/communities/eu https://doi.org/10.1007/s00382-015-2922-5 oai:zenodo.org:48716 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Climate Dynamics, PP1-12, (2015-11-28) Sea ice variability Air–sea interaction NAO pattern EA pattern info:eu-repo/semantics/article 2015 ftzenodo https://doi.org/10.1007/s00382-015-2922-5 2024-07-25T13:04:30Z Satellite-derived sea-ice concentration (SIC) and re-analysed atmospheric data are used to analyse the potential feedback of the North Atlantic Oscillation (NAO)-driven sea-ice anomalies in winter onto the atmosphere during 1979–2013. A maximum covariance analysis shows that this feedback can be detected with monthly data. When SIC leads, the covariability between Atlantic SIC and the Euro-Atlantic atmospheric circulation in February is statistically significant, but shows intra-seasonal differences: the December SIC influence is dominated by anomalies east of Greenland, with maximum amplitude in the Greenland Sea (GS); while the January SIC influence is dominated by anomalies west of Greenland, in the Davis Strait-Labrador Sea (DL) region. The lagged atmospheric anomalies are likewise different. A reduction of SIC over GS in December is followed in February by a negative NAO-like pattern near the surface and a hemispheric signature in the upper-troposphere, thus acting as a negative feedback. On the other hand, a reduction of SIC over DL in January is followed by an atmospheric anomaly over the North Atlantic that projects on the positive phase of the East Atlantic pattern. The dynamics associated with these atmospheric anomalies is described, indicating that transient-eddy activity is likely at work in settling the large-scale patterns. The role of concomitant North Atlantic sea surface temperature anomalies is discussed. Article in Journal/Newspaper Davis Strait Greenland Greenland Sea Labrador Sea North Atlantic North Atlantic oscillation Sea ice Zenodo Climate Dynamics 47 5-6 1601 1612 |
institution |
Open Polar |
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Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Sea ice variability Air–sea interaction NAO pattern EA pattern |
spellingShingle |
Sea ice variability Air–sea interaction NAO pattern EA pattern García-Serrano, Javier Frankignoul, C. On the feedback of the winter NAO-driven sea ice anomalies |
topic_facet |
Sea ice variability Air–sea interaction NAO pattern EA pattern |
description |
Satellite-derived sea-ice concentration (SIC) and re-analysed atmospheric data are used to analyse the potential feedback of the North Atlantic Oscillation (NAO)-driven sea-ice anomalies in winter onto the atmosphere during 1979–2013. A maximum covariance analysis shows that this feedback can be detected with monthly data. When SIC leads, the covariability between Atlantic SIC and the Euro-Atlantic atmospheric circulation in February is statistically significant, but shows intra-seasonal differences: the December SIC influence is dominated by anomalies east of Greenland, with maximum amplitude in the Greenland Sea (GS); while the January SIC influence is dominated by anomalies west of Greenland, in the Davis Strait-Labrador Sea (DL) region. The lagged atmospheric anomalies are likewise different. A reduction of SIC over GS in December is followed in February by a negative NAO-like pattern near the surface and a hemispheric signature in the upper-troposphere, thus acting as a negative feedback. On the other hand, a reduction of SIC over DL in January is followed by an atmospheric anomaly over the North Atlantic that projects on the positive phase of the East Atlantic pattern. The dynamics associated with these atmospheric anomalies is described, indicating that transient-eddy activity is likely at work in settling the large-scale patterns. The role of concomitant North Atlantic sea surface temperature anomalies is discussed. |
format |
Article in Journal/Newspaper |
author |
García-Serrano, Javier Frankignoul, C. |
author_facet |
García-Serrano, Javier Frankignoul, C. |
author_sort |
García-Serrano, Javier |
title |
On the feedback of the winter NAO-driven sea ice anomalies |
title_short |
On the feedback of the winter NAO-driven sea ice anomalies |
title_full |
On the feedback of the winter NAO-driven sea ice anomalies |
title_fullStr |
On the feedback of the winter NAO-driven sea ice anomalies |
title_full_unstemmed |
On the feedback of the winter NAO-driven sea ice anomalies |
title_sort |
on the feedback of the winter nao-driven sea ice anomalies |
publisher |
Zenodo |
publishDate |
2015 |
url |
https://doi.org/10.1007/s00382-015-2922-5 |
genre |
Davis Strait Greenland Greenland Sea Labrador Sea North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Davis Strait Greenland Greenland Sea Labrador Sea North Atlantic North Atlantic oscillation Sea ice |
op_source |
Climate Dynamics, PP1-12, (2015-11-28) |
op_relation |
https://zenodo.org/communities/naclim https://zenodo.org/communities/eu https://doi.org/10.1007/s00382-015-2922-5 oai:zenodo.org:48716 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.1007/s00382-015-2922-5 |
container_title |
Climate Dynamics |
container_volume |
47 |
container_issue |
5-6 |
container_start_page |
1601 |
op_container_end_page |
1612 |
_version_ |
1810441025747943424 |