Circulation responses to surface heating and implications for polar amplification
A seminal study by Hoskins and Karoly (1981) explored the atmospheric circulation response to tropospheric heating perturbations at low and mid latitudes. Here we revisit and extend their study by investigating the circulation and temperature response to low, mid and high latitude surface heating us...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070840 2024-02-04T10:04:26+01:00 Circulation responses to surface heating and implications for polar amplification Siew, Peter Yu Feng Li, Camille Sobolowski, Stefan Pieter Dunn-Sigouin, Etienne Ting, Mingfang 2024-01 electronic https://doi.org/10.5194/egusphere-2023-3066 https://noa.gwlb.de/receive/cop_mods_00070840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069169/egusphere-2023-3066.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-3066/egusphere-2023-3066.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-3066 https://noa.gwlb.de/receive/cop_mods_00070840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069169/egusphere-2023-3066.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-3066/egusphere-2023-3066.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-3066 2024-01-08T00:22:45Z A seminal study by Hoskins and Karoly (1981) explored the atmospheric circulation response to tropospheric heating perturbations at low and mid latitudes. Here we revisit and extend their study by investigating the circulation and temperature response to low, mid and high latitude surface heating using an idealised moist, gray radiation model. Our results corroborate previous findings showing that heating perturbations at low and mid latitudes are balanced by different mean circulation responses - upward motion and horizontal temperature advection, respectively. Transient eddy heat flux divergence plays an increasingly important role with latitude, becoming the main circulation response at high latitudes. However, this mechanism is less efficient at balancing heating perturbations than temperature advection, leading to greater reliance on an additional contribution from radiative cooling. These dynamical and radiative adjustments promote stronger lower tropospheric warming for surface heating at high latitudes compared with lower latitudes, suggesting a mechanism by which sea ice loss promotes a polar-amplified temperature signal of climate change. Article in Journal/Newspaper Sea ice Niedersächsisches Online-Archiv NOA Hoskins ENVELOPE(159.050,159.050,-81.833,-81.833) |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Siew, Peter Yu Feng Li, Camille Sobolowski, Stefan Pieter Dunn-Sigouin, Etienne Ting, Mingfang Circulation responses to surface heating and implications for polar amplification |
topic_facet |
article Verlagsveröffentlichung |
description |
A seminal study by Hoskins and Karoly (1981) explored the atmospheric circulation response to tropospheric heating perturbations at low and mid latitudes. Here we revisit and extend their study by investigating the circulation and temperature response to low, mid and high latitude surface heating using an idealised moist, gray radiation model. Our results corroborate previous findings showing that heating perturbations at low and mid latitudes are balanced by different mean circulation responses - upward motion and horizontal temperature advection, respectively. Transient eddy heat flux divergence plays an increasingly important role with latitude, becoming the main circulation response at high latitudes. However, this mechanism is less efficient at balancing heating perturbations than temperature advection, leading to greater reliance on an additional contribution from radiative cooling. These dynamical and radiative adjustments promote stronger lower tropospheric warming for surface heating at high latitudes compared with lower latitudes, suggesting a mechanism by which sea ice loss promotes a polar-amplified temperature signal of climate change. |
format |
Article in Journal/Newspaper |
author |
Siew, Peter Yu Feng Li, Camille Sobolowski, Stefan Pieter Dunn-Sigouin, Etienne Ting, Mingfang |
author_facet |
Siew, Peter Yu Feng Li, Camille Sobolowski, Stefan Pieter Dunn-Sigouin, Etienne Ting, Mingfang |
author_sort |
Siew, Peter Yu Feng |
title |
Circulation responses to surface heating and implications for polar amplification |
title_short |
Circulation responses to surface heating and implications for polar amplification |
title_full |
Circulation responses to surface heating and implications for polar amplification |
title_fullStr |
Circulation responses to surface heating and implications for polar amplification |
title_full_unstemmed |
Circulation responses to surface heating and implications for polar amplification |
title_sort |
circulation responses to surface heating and implications for polar amplification |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-3066 https://noa.gwlb.de/receive/cop_mods_00070840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069169/egusphere-2023-3066.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-3066/egusphere-2023-3066.pdf |
long_lat |
ENVELOPE(159.050,159.050,-81.833,-81.833) |
geographic |
Hoskins |
geographic_facet |
Hoskins |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://doi.org/10.5194/egusphere-2023-3066 https://noa.gwlb.de/receive/cop_mods_00070840 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069169/egusphere-2023-3066.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-3066/egusphere-2023-3066.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-3066 |
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1789972913662722048 |