The transient atmospheric response to a reduction of sea-ice cover in the Barents and Kara Seas
The observed reduction of Arctic sea ice has drawn a lot of interest for its potential impact on midlatitude weather variability. One of the outstanding challenges is to achieve a deeper understanding of the dynamical processes involved in this mechanism. To progress in this area, we have designed a...
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ftunibolognairis:oai:cris.unibo.it:11585/746724 2024-09-15T18:22:37+00:00 The transient atmospheric response to a reduction of sea-ice cover in the Barents and Kara Seas Ruggieri P. Kucharski F. Buizza R. Ambaum M. H. P. Ruggieri P. Kucharski F. Buizza R. Ambaum M.H.P. 2017 STAMPA http://hdl.handle.net/11585/746724 https://doi.org/10.1002/qj.3034 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1477-870X eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000402539500033 volume:143 issue:704 firstpage:1632 lastpage:1640 numberofpages:9 journal:QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY http://hdl.handle.net/11585/746724 doi:10.1002/qj.3034 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85019641305 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1477-870X North Atlantic Oscillation sea-ice reduction troposphere–stratosphere coupling info:eu-repo/semantics/article 2017 ftunibolognairis https://doi.org/10.1002/qj.3034 2024-06-24T14:24:34Z The observed reduction of Arctic sea ice has drawn a lot of interest for its potential impact on midlatitude weather variability. One of the outstanding challenges is to achieve a deeper understanding of the dynamical processes involved in this mechanism. To progress in this area, we have designed and performed an experiment with an intermediate complexity atmospheric model. The experiment shows a transient atmospheric response to a surface diabatic heating in the Barents and Kara Seas leading to an anomalous circulation first locally, then over the polar region and finally over the Euro-Atlantic sector. A hypothesis that explains the mechanisms for the propagation of the signal is put forward. The discussion of this hypothesis provides an insight into the nature of the link between sea-ice forcing and the modes of internal variability of the atmosphere. We demonstrate that, after removal of sea ice in the Barents and Kara Seas, first the linear atmospheric response dominates and is confined in the proximity of the heating area, then a large-scale response, associated also with eddy feedback, is found and finally anomalies reach the lower stratosphere and show a hemispheric pattern in the troposphere. These results identify the drivers of the tropospheric connection between sea-ice variability and the North Atlantic Oscillation and highlight the role of the lower stratosphere. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Sea ice IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Quarterly Journal of the Royal Meteorological Society 143 704 1632 1640 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
North Atlantic Oscillation sea-ice reduction troposphere–stratosphere coupling |
spellingShingle |
North Atlantic Oscillation sea-ice reduction troposphere–stratosphere coupling Ruggieri P. Kucharski F. Buizza R. Ambaum M. H. P. The transient atmospheric response to a reduction of sea-ice cover in the Barents and Kara Seas |
topic_facet |
North Atlantic Oscillation sea-ice reduction troposphere–stratosphere coupling |
description |
The observed reduction of Arctic sea ice has drawn a lot of interest for its potential impact on midlatitude weather variability. One of the outstanding challenges is to achieve a deeper understanding of the dynamical processes involved in this mechanism. To progress in this area, we have designed and performed an experiment with an intermediate complexity atmospheric model. The experiment shows a transient atmospheric response to a surface diabatic heating in the Barents and Kara Seas leading to an anomalous circulation first locally, then over the polar region and finally over the Euro-Atlantic sector. A hypothesis that explains the mechanisms for the propagation of the signal is put forward. The discussion of this hypothesis provides an insight into the nature of the link between sea-ice forcing and the modes of internal variability of the atmosphere. We demonstrate that, after removal of sea ice in the Barents and Kara Seas, first the linear atmospheric response dominates and is confined in the proximity of the heating area, then a large-scale response, associated also with eddy feedback, is found and finally anomalies reach the lower stratosphere and show a hemispheric pattern in the troposphere. These results identify the drivers of the tropospheric connection between sea-ice variability and the North Atlantic Oscillation and highlight the role of the lower stratosphere. |
author2 |
Ruggieri P. Kucharski F. Buizza R. Ambaum M.H.P. |
format |
Article in Journal/Newspaper |
author |
Ruggieri P. Kucharski F. Buizza R. Ambaum M. H. P. |
author_facet |
Ruggieri P. Kucharski F. Buizza R. Ambaum M. H. P. |
author_sort |
Ruggieri P. |
title |
The transient atmospheric response to a reduction of sea-ice cover in the Barents and Kara Seas |
title_short |
The transient atmospheric response to a reduction of sea-ice cover in the Barents and Kara Seas |
title_full |
The transient atmospheric response to a reduction of sea-ice cover in the Barents and Kara Seas |
title_fullStr |
The transient atmospheric response to a reduction of sea-ice cover in the Barents and Kara Seas |
title_full_unstemmed |
The transient atmospheric response to a reduction of sea-ice cover in the Barents and Kara Seas |
title_sort |
transient atmospheric response to a reduction of sea-ice cover in the barents and kara seas |
publishDate |
2017 |
url |
http://hdl.handle.net/11585/746724 https://doi.org/10.1002/qj.3034 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1477-870X |
genre |
North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
North Atlantic North Atlantic oscillation Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000402539500033 volume:143 issue:704 firstpage:1632 lastpage:1640 numberofpages:9 journal:QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY http://hdl.handle.net/11585/746724 doi:10.1002/qj.3034 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85019641305 http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1477-870X |
op_doi |
https://doi.org/10.1002/qj.3034 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
143 |
container_issue |
704 |
container_start_page |
1632 |
op_container_end_page |
1640 |
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