Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013
© 2014 Springer-Verlag Berlin Heidelberg During the 2012–2013 winter, the negative phase of the North Atlantic Oscillation (NAO) predominated, resulting in a cold winter over Europe and northern Asia punctuated by episodes of frigid weather. This climate anomaly is part of a recent trend towards neg...
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ftcdlib:oai:escholarship.org/ark:/13030/qt0xq1c908 2023-05-15T14:51:07+02:00 Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013 Peings, Y Magnusdottir, G 1181 - 1206 2014-10-19 application/pdf https://escholarship.org/uc/item/0xq1c908 unknown eScholarship, University of California qt0xq1c908 https://escholarship.org/uc/item/0xq1c908 CC-BY CC-BY Climate Dynamics, vol 45, iss 5-6 Climate variability North Atlantic Oscillation Ocean-atmosphere interactions Arctic sea ice Siberian snow 2012-2013 winter Meteorology & Atmospheric Sciences Atmospheric Sciences Oceanography Physical Geography and Environmental Geoscience article 2014 ftcdlib 2020-03-20T23:55:48Z © 2014 Springer-Verlag Berlin Heidelberg During the 2012–2013 winter, the negative phase of the North Atlantic Oscillation (NAO) predominated, resulting in a cold winter over Europe and northern Asia punctuated by episodes of frigid weather. This climate anomaly is part of a recent trend towards negative values of the NAO index that has occurred over recent winters. The negative trend of the NAO may be related to atmospheric internal variability but it may also be partly forced by slowly varying components of the climate system. In the present study, we investigate the influence of surface conditions on the atmospheric circulation for the 2012–2013 winter using an atmospheric global climate model. In particular, the role of low Arctic sea ice concentration, warm tropical/North Atlantic sea surface temperature and positive Siberian snow cover anomalies are isolated by prescribing them in a set of different numerical experiments. Our simulations suggest that each of these surface forcings favored a negative NAO during the 2012–2013 winter. In our model, the combined NAO response to tropical/North Atlantic SST, Arctic sea ice and Siberian snow anomalies accounts for about 30 % of the observed NAO anomaly. Different physical mechanisms are explored to elucidate the atmospheric responses and are shown to involve both tropical and extratropical processes. Article in Journal/Newspaper Arctic North Atlantic North Atlantic oscillation Sea ice University of California: eScholarship Arctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate variability North Atlantic Oscillation Ocean-atmosphere interactions Arctic sea ice Siberian snow 2012-2013 winter Meteorology & Atmospheric Sciences Atmospheric Sciences Oceanography Physical Geography and Environmental Geoscience |
spellingShingle |
Climate variability North Atlantic Oscillation Ocean-atmosphere interactions Arctic sea ice Siberian snow 2012-2013 winter Meteorology & Atmospheric Sciences Atmospheric Sciences Oceanography Physical Geography and Environmental Geoscience Peings, Y Magnusdottir, G Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013 |
topic_facet |
Climate variability North Atlantic Oscillation Ocean-atmosphere interactions Arctic sea ice Siberian snow 2012-2013 winter Meteorology & Atmospheric Sciences Atmospheric Sciences Oceanography Physical Geography and Environmental Geoscience |
description |
© 2014 Springer-Verlag Berlin Heidelberg During the 2012–2013 winter, the negative phase of the North Atlantic Oscillation (NAO) predominated, resulting in a cold winter over Europe and northern Asia punctuated by episodes of frigid weather. This climate anomaly is part of a recent trend towards negative values of the NAO index that has occurred over recent winters. The negative trend of the NAO may be related to atmospheric internal variability but it may also be partly forced by slowly varying components of the climate system. In the present study, we investigate the influence of surface conditions on the atmospheric circulation for the 2012–2013 winter using an atmospheric global climate model. In particular, the role of low Arctic sea ice concentration, warm tropical/North Atlantic sea surface temperature and positive Siberian snow cover anomalies are isolated by prescribing them in a set of different numerical experiments. Our simulations suggest that each of these surface forcings favored a negative NAO during the 2012–2013 winter. In our model, the combined NAO response to tropical/North Atlantic SST, Arctic sea ice and Siberian snow anomalies accounts for about 30 % of the observed NAO anomaly. Different physical mechanisms are explored to elucidate the atmospheric responses and are shown to involve both tropical and extratropical processes. |
format |
Article in Journal/Newspaper |
author |
Peings, Y Magnusdottir, G |
author_facet |
Peings, Y Magnusdottir, G |
author_sort |
Peings, Y |
title |
Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013 |
title_short |
Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013 |
title_full |
Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013 |
title_fullStr |
Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013 |
title_full_unstemmed |
Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013 |
title_sort |
role of sea surface temperature, arctic sea ice and siberian snow in forcing the atmospheric circulation in winter of 2012–2013 |
publisher |
eScholarship, University of California |
publishDate |
2014 |
url |
https://escholarship.org/uc/item/0xq1c908 |
op_coverage |
1181 - 1206 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Arctic North Atlantic North Atlantic oscillation Sea ice |
op_source |
Climate Dynamics, vol 45, iss 5-6 |
op_relation |
qt0xq1c908 https://escholarship.org/uc/item/0xq1c908 |
op_rights |
CC-BY |
op_rightsnorm |
CC-BY |
_version_ |
1766322179385851904 |