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...
Published in: | Climate Dynamics |
---|---|
Main Authors: | , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer
2015
|
Subjects: | |
Online Access: | http://hdl.handle.net/2117/83341 https://doi.org/10.1007/s00382-015-2922-5 |
id |
ftupcatalunya:oai:upcommons.upc.edu:2117/83341 |
---|---|
record_format |
openpolar |
spelling |
ftupcatalunya:oai:upcommons.upc.edu:2117/83341 2023-05-15T16:00:14+02:00 On the feedback of the winter NAO‑driven sea ice anomalies García-Serrano, Javier Frankignoul, Claude Barcelona Supercomputing Center 2015-11-28 12 p. http://hdl.handle.net/2117/83341 https://doi.org/10.1007/s00382-015-2922-5 eng eng Springer http://link.springer.com/article/10.1007/s00382-015-2922-5 info:eu-repo/grantAgreement/EC/H2020/655339/EU/Dynamics and Predictability of the ENSO teleconnection to the Tropical North Atlantic/DPETNA info:eu-repo/grantAgreement/EC/FP7/308299/EU/North Atlantic Climate: Predictability of the climate in the North Atlantic%2FEuropean sector related to North Atlantic%2FArctic sea surface temperature and sea ice variability and change/NACLIM Open Access Àrees temàtiques de la UPC::Enginyeria electrònica::Impacte ambiental Climate Sea ice variability Air-sea interaction NAO pattern EA pattern Climatologia -- Aspectes ambientals Article 2015 ftupcatalunya https://doi.org/10.1007/s00382-015-2922-5 2019-09-29T09:10:39Z 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 intraseasonal 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. The research leading to these results has received funding from the European Union 7th Framework Programme (FP7 2007-2013), under grant agreement n.308299 (NACLIM – www.naclim.eu). JG-S was partially supported by the H2020-funded MSCA-IF-EF DPETNA project. The authors thank Francis Codron (LOCEAN-IPSL) for discussions and two anonymous reviewers for their comments on the manuscript. Peer Reviewed Postprint (author's final draft) Article in Journal/Newspaper Davis Strait Greenland Greenland Sea Labrador Sea North Atlantic North Atlantic oscillation Sea ice Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX) Greenland Climate Dynamics 47 5-6 1601 1612 |
institution |
Open Polar |
collection |
Universitat Politècnica de Catalunya (UPC): Theses and Dissertations Online (TDX) |
op_collection_id |
ftupcatalunya |
language |
English |
topic |
Àrees temàtiques de la UPC::Enginyeria electrònica::Impacte ambiental Climate Sea ice variability Air-sea interaction NAO pattern EA pattern Climatologia -- Aspectes ambientals |
spellingShingle |
Àrees temàtiques de la UPC::Enginyeria electrònica::Impacte ambiental Climate Sea ice variability Air-sea interaction NAO pattern EA pattern Climatologia -- Aspectes ambientals García-Serrano, Javier Frankignoul, Claude On the feedback of the winter NAO‑driven sea ice anomalies |
topic_facet |
Àrees temàtiques de la UPC::Enginyeria electrònica::Impacte ambiental Climate Sea ice variability Air-sea interaction NAO pattern EA pattern Climatologia -- Aspectes ambientals |
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 intraseasonal 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. The research leading to these results has received funding from the European Union 7th Framework Programme (FP7 2007-2013), under grant agreement n.308299 (NACLIM – www.naclim.eu). JG-S was partially supported by the H2020-funded MSCA-IF-EF DPETNA project. The authors thank Francis Codron (LOCEAN-IPSL) for discussions and two anonymous reviewers for their comments on the manuscript. Peer Reviewed Postprint (author's final draft) |
author2 |
Barcelona Supercomputing Center |
format |
Article in Journal/Newspaper |
author |
García-Serrano, Javier Frankignoul, Claude |
author_facet |
García-Serrano, Javier Frankignoul, Claude |
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 |
Springer |
publishDate |
2015 |
url |
http://hdl.handle.net/2117/83341 https://doi.org/10.1007/s00382-015-2922-5 |
geographic |
Greenland |
geographic_facet |
Greenland |
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_relation |
http://link.springer.com/article/10.1007/s00382-015-2922-5 info:eu-repo/grantAgreement/EC/H2020/655339/EU/Dynamics and Predictability of the ENSO teleconnection to the Tropical North Atlantic/DPETNA info:eu-repo/grantAgreement/EC/FP7/308299/EU/North Atlantic Climate: Predictability of the climate in the North Atlantic%2FEuropean sector related to North Atlantic%2FArctic sea surface temperature and sea ice variability and change/NACLIM |
op_rights |
Open Access |
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_ |
1766396121381339136 |