The response of the midlatitude jet to regional polar heating in a simple storm-track model
Given the recent changes in theArctic sea ice, understanding the effects of the resultant polar warming on the global climate is of great importance. However, the interaction between the Arctic and midlatitude circulation involves a complex chain of mechanisms, which leaves state-of-the-art general...
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ftunibolognairis:oai:cris.unibo.it:11585/746728 2024-05-19T07:35:51+00:00 The response of the midlatitude jet to regional polar heating in a simple storm-track model Ruggieri P. Kucharski F. Novak L. Ruggieri P. Kucharski F. Novak L. 2019 STAMPA http://hdl.handle.net/11585/746728 https://doi.org/10.1175/JCLI-D-18-0257.1 https://journals.ametsoc.org/jcli/article/32/10/2869/343860/The-Response-of-the-Midlatitude-Jet-to-Regional eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000466129500001 volume:32 issue:10 firstpage:2869 lastpage:2885 numberofpages:17 journal:JOURNAL OF CLIMATE info:eu-repo/grantAgreement/EC/H2020/727852 http://hdl.handle.net/11585/746728 doi:10.1175/JCLI-D-18-0257.1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85065795635 https://journals.ametsoc.org/jcli/article/32/10/2869/343860/The-Response-of-the-Midlatitude-Jet-to-Regional info:eu-repo/semantics/openAccess Atmosphere Climate variability Seasonal variability Teleconnections info:eu-repo/semantics/article 2019 ftunibolognairis https://doi.org/10.1175/JCLI-D-18-0257.1 2024-04-26T00:22:03Z Given the recent changes in theArctic sea ice, understanding the effects of the resultant polar warming on the global climate is of great importance. However, the interaction between the Arctic and midlatitude circulation involves a complex chain of mechanisms, which leaves state-of-the-art general circulation models unable to represent this interaction unambiguously. This study uses an idealized general circulation model to provide a process-based understanding of the sensitivity of the midlatitude circulation to the location of high-latitude warming. A simplified atmosphere is simulated with a single zonally localized midlatitude storm track, which is analogous to the stormtracks in the NorthernHemisphere. It is found that even small changes in the position of the forcing relative to that storm track can lead to very different responses in the midlatitude circulation.More specifically, it is found that heating concentrated in one region may cause a substantially stronger global response compared to when the same amount of heating is distributed across all longitudes at the same latitude. Linear interference between climatological and anomalous flow is an important component of the response, but it does not explain differences between different longitudes of the forcing. Feedbacks from atmospheric transient eddies are found to be associated with this strong response. A dependence between the climatological jet latitude and the jet response to polar surface heating is found. These results can be used to design and interpret experiments with complex state-of-the-art models targeted at Arctic-midlatitude interactions. Article in Journal/Newspaper Arctic Sea ice IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Journal of Climate 32 10 2869 2885 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Atmosphere Climate variability Seasonal variability Teleconnections |
spellingShingle |
Atmosphere Climate variability Seasonal variability Teleconnections Ruggieri P. Kucharski F. Novak L. The response of the midlatitude jet to regional polar heating in a simple storm-track model |
topic_facet |
Atmosphere Climate variability Seasonal variability Teleconnections |
description |
Given the recent changes in theArctic sea ice, understanding the effects of the resultant polar warming on the global climate is of great importance. However, the interaction between the Arctic and midlatitude circulation involves a complex chain of mechanisms, which leaves state-of-the-art general circulation models unable to represent this interaction unambiguously. This study uses an idealized general circulation model to provide a process-based understanding of the sensitivity of the midlatitude circulation to the location of high-latitude warming. A simplified atmosphere is simulated with a single zonally localized midlatitude storm track, which is analogous to the stormtracks in the NorthernHemisphere. It is found that even small changes in the position of the forcing relative to that storm track can lead to very different responses in the midlatitude circulation.More specifically, it is found that heating concentrated in one region may cause a substantially stronger global response compared to when the same amount of heating is distributed across all longitudes at the same latitude. Linear interference between climatological and anomalous flow is an important component of the response, but it does not explain differences between different longitudes of the forcing. Feedbacks from atmospheric transient eddies are found to be associated with this strong response. A dependence between the climatological jet latitude and the jet response to polar surface heating is found. These results can be used to design and interpret experiments with complex state-of-the-art models targeted at Arctic-midlatitude interactions. |
author2 |
Ruggieri P. Kucharski F. Novak L. |
format |
Article in Journal/Newspaper |
author |
Ruggieri P. Kucharski F. Novak L. |
author_facet |
Ruggieri P. Kucharski F. Novak L. |
author_sort |
Ruggieri P. |
title |
The response of the midlatitude jet to regional polar heating in a simple storm-track model |
title_short |
The response of the midlatitude jet to regional polar heating in a simple storm-track model |
title_full |
The response of the midlatitude jet to regional polar heating in a simple storm-track model |
title_fullStr |
The response of the midlatitude jet to regional polar heating in a simple storm-track model |
title_full_unstemmed |
The response of the midlatitude jet to regional polar heating in a simple storm-track model |
title_sort |
response of the midlatitude jet to regional polar heating in a simple storm-track model |
publishDate |
2019 |
url |
http://hdl.handle.net/11585/746728 https://doi.org/10.1175/JCLI-D-18-0257.1 https://journals.ametsoc.org/jcli/article/32/10/2869/343860/The-Response-of-the-Midlatitude-Jet-to-Regional |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000466129500001 volume:32 issue:10 firstpage:2869 lastpage:2885 numberofpages:17 journal:JOURNAL OF CLIMATE info:eu-repo/grantAgreement/EC/H2020/727852 http://hdl.handle.net/11585/746728 doi:10.1175/JCLI-D-18-0257.1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85065795635 https://journals.ametsoc.org/jcli/article/32/10/2869/343860/The-Response-of-the-Midlatitude-Jet-to-Regional |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1175/JCLI-D-18-0257.1 |
container_title |
Journal of Climate |
container_volume |
32 |
container_issue |
10 |
container_start_page |
2869 |
op_container_end_page |
2885 |
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1799474876696756224 |