Atmospheric Circulation Sensitivity to Changes in the Vertical Structure of Polar Warming
This study examines the effects of the vertical structure of polar warming on the remote atmospheric circulation. We apply thermal forcing at different vertical levels in the Northern Hemisphere polar region in two atmospheric global climate models of different complexity, both coupled to an aquapla...
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ftuisanist:oai:scholarworks.unist.ac.kr:201301/54825 2023-05-15T15:03:24+02:00 Atmospheric Circulation Sensitivity to Changes in the Vertical Structure of Polar Warming Kim, Doyeon Kang, Sarah M. Merlis, Timothy M. Shin, Yechul 2021-10 https://scholarworks.unist.ac.kr/handle/201301/54825 https://doi.org/10.1029/2021GL094726 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL094726 ?????? unknown AMER GEOPHYSICAL UNION GEOPHYSICAL RESEARCH LETTERS, v.48, no.19, pp.e2021GL094 0094-8276 https://scholarworks.unist.ac.kr/handle/201301/54825 39638 2-s2.0-85116828812 000706306000017 doi:10.1029/2021GL094726 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL094726 ARTICLE ART 2021 ftuisanist https://doi.org/10.1029/2021GL094726 2022-05-15T05:56:51Z This study examines the effects of the vertical structure of polar warming on the remote atmospheric circulation. We apply thermal forcing at different vertical levels in the Northern Hemisphere polar region in two atmospheric global climate models of different complexity, both coupled to an aquaplanet slab ocean. The efficacy of polar heating in perturbing the remote climate increases with the altitude at which it is applied. This robust sensitivity arises from the dominance of surface temperature contribution to the outgoing longwave radiation owing to the large emissivity of the polar troposphere. An upper-level polar heating has a smaller fraction of forcing balanced by radiative flux changes and a larger contribution from atmospheric energy transport changes, which provokes larger shifts in the extratropical jet and Hadley circulation. Our results suggest increasingly far-reaching impacts of Arctic warming as a less surface-trapped profile is projected for seasonally ice-free conditions in the near future. Article in Journal/Newspaper Arctic ScholarWorks@UNIST (Ulsan National Institute of Science and Technology) Arctic Geophysical Research Letters 48 19 |
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Open Polar |
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ScholarWorks@UNIST (Ulsan National Institute of Science and Technology) |
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ftuisanist |
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unknown |
description |
This study examines the effects of the vertical structure of polar warming on the remote atmospheric circulation. We apply thermal forcing at different vertical levels in the Northern Hemisphere polar region in two atmospheric global climate models of different complexity, both coupled to an aquaplanet slab ocean. The efficacy of polar heating in perturbing the remote climate increases with the altitude at which it is applied. This robust sensitivity arises from the dominance of surface temperature contribution to the outgoing longwave radiation owing to the large emissivity of the polar troposphere. An upper-level polar heating has a smaller fraction of forcing balanced by radiative flux changes and a larger contribution from atmospheric energy transport changes, which provokes larger shifts in the extratropical jet and Hadley circulation. Our results suggest increasingly far-reaching impacts of Arctic warming as a less surface-trapped profile is projected for seasonally ice-free conditions in the near future. |
format |
Article in Journal/Newspaper |
author |
Kim, Doyeon Kang, Sarah M. Merlis, Timothy M. Shin, Yechul |
spellingShingle |
Kim, Doyeon Kang, Sarah M. Merlis, Timothy M. Shin, Yechul Atmospheric Circulation Sensitivity to Changes in the Vertical Structure of Polar Warming |
author_facet |
Kim, Doyeon Kang, Sarah M. Merlis, Timothy M. Shin, Yechul |
author_sort |
Kim, Doyeon |
title |
Atmospheric Circulation Sensitivity to Changes in the Vertical Structure of Polar Warming |
title_short |
Atmospheric Circulation Sensitivity to Changes in the Vertical Structure of Polar Warming |
title_full |
Atmospheric Circulation Sensitivity to Changes in the Vertical Structure of Polar Warming |
title_fullStr |
Atmospheric Circulation Sensitivity to Changes in the Vertical Structure of Polar Warming |
title_full_unstemmed |
Atmospheric Circulation Sensitivity to Changes in the Vertical Structure of Polar Warming |
title_sort |
atmospheric circulation sensitivity to changes in the vertical structure of polar warming |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2021 |
url |
https://scholarworks.unist.ac.kr/handle/201301/54825 https://doi.org/10.1029/2021GL094726 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL094726 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
GEOPHYSICAL RESEARCH LETTERS, v.48, no.19, pp.e2021GL094 0094-8276 https://scholarworks.unist.ac.kr/handle/201301/54825 39638 2-s2.0-85116828812 000706306000017 doi:10.1029/2021GL094726 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021GL094726 |
op_doi |
https://doi.org/10.1029/2021GL094726 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
19 |
_version_ |
1766335258544832512 |