Diabatic effects on the evolution of storm tracks
Despite the crucial role of moist diabatic processes in mid-latitude storm tracks and related model biases, we still lack a more complete theoretical understanding of how diabatic processes affect the evolution of storm tracks. To alleviate this shortcoming, we investigate the role of diabatic proce...
Published in: | Weather and Climate Dynamics |
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00069663 2023-12-03T10:27:06+01:00 Diabatic effects on the evolution of storm tracks Marcheggiani, Andrea Spengler, Thomas 2023-11 electronic https://doi.org/10.5194/wcd-4-927-2023 https://noa.gwlb.de/receive/cop_mods_00069663 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068040/wcd-4-927-2023.pdf https://wcd.copernicus.org/articles/4/927/2023/wcd-4-927-2023.pdf eng eng Copernicus Publications Weather and Climate Dynamics -- https://www.weather-climate-dynamics.net/ -- 2698-4016 https://doi.org/10.5194/wcd-4-927-2023 https://noa.gwlb.de/receive/cop_mods_00069663 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068040/wcd-4-927-2023.pdf https://wcd.copernicus.org/articles/4/927/2023/wcd-4-927-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/wcd-4-927-2023 2023-11-06T00:22:50Z Despite the crucial role of moist diabatic processes in mid-latitude storm tracks and related model biases, we still lack a more complete theoretical understanding of how diabatic processes affect the evolution of storm tracks. To alleviate this shortcoming, we investigate the role of diabatic processes in the evolution of the northern hemispheric storm tracks using a framework based on the tendency of the slope of isentropic surfaces as a measure of baroclinic development. We identify opposing behaviours in the near-surface and free troposphere for the relationship between the flattening of the slope of isentropic surfaces and its restoration by diabatic processes. Near the surface (900–825 hPa), cold air advection associated with cold air outbreaks initially acts to flatten isentropic surfaces, with air–sea interactions ensuing to restore surface baroclinicity. In the free troposphere (750–350 hPa), on the other hand, the diabatic generation of the slope of isentropic surfaces precedes its depletion due to tilting by eddies, suggesting the primary importance of moist diabatic processes in triggering subsequent baroclinic development. The same phasing between diabatic and tilting tendencies of the slope is observed both in upstream and downstream sectors of the North Atlantic and North Pacific storm tracks. This suggests that the reversed behaviour between near-surface and free troposphere is a general feature of mid-latitude storm tracks. In addition, we find a correspondence between the diabatic generation of the slope of isentropic surfaces and enhanced precipitation as well as moisture availability, further underlining the crucial role of moisture and moist processes in the self-maintenance of storm tracks. Article in Journal/Newspaper North Atlantic Niedersächsisches Online-Archiv NOA Pacific Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Weather and Climate Dynamics 4 4 927 942 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Marcheggiani, Andrea Spengler, Thomas Diabatic effects on the evolution of storm tracks |
topic_facet |
article Verlagsveröffentlichung |
description |
Despite the crucial role of moist diabatic processes in mid-latitude storm tracks and related model biases, we still lack a more complete theoretical understanding of how diabatic processes affect the evolution of storm tracks. To alleviate this shortcoming, we investigate the role of diabatic processes in the evolution of the northern hemispheric storm tracks using a framework based on the tendency of the slope of isentropic surfaces as a measure of baroclinic development. We identify opposing behaviours in the near-surface and free troposphere for the relationship between the flattening of the slope of isentropic surfaces and its restoration by diabatic processes. Near the surface (900–825 hPa), cold air advection associated with cold air outbreaks initially acts to flatten isentropic surfaces, with air–sea interactions ensuing to restore surface baroclinicity. In the free troposphere (750–350 hPa), on the other hand, the diabatic generation of the slope of isentropic surfaces precedes its depletion due to tilting by eddies, suggesting the primary importance of moist diabatic processes in triggering subsequent baroclinic development. The same phasing between diabatic and tilting tendencies of the slope is observed both in upstream and downstream sectors of the North Atlantic and North Pacific storm tracks. This suggests that the reversed behaviour between near-surface and free troposphere is a general feature of mid-latitude storm tracks. In addition, we find a correspondence between the diabatic generation of the slope of isentropic surfaces and enhanced precipitation as well as moisture availability, further underlining the crucial role of moisture and moist processes in the self-maintenance of storm tracks. |
format |
Article in Journal/Newspaper |
author |
Marcheggiani, Andrea Spengler, Thomas |
author_facet |
Marcheggiani, Andrea Spengler, Thomas |
author_sort |
Marcheggiani, Andrea |
title |
Diabatic effects on the evolution of storm tracks |
title_short |
Diabatic effects on the evolution of storm tracks |
title_full |
Diabatic effects on the evolution of storm tracks |
title_fullStr |
Diabatic effects on the evolution of storm tracks |
title_full_unstemmed |
Diabatic effects on the evolution of storm tracks |
title_sort |
diabatic effects on the evolution of storm tracks |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/wcd-4-927-2023 https://noa.gwlb.de/receive/cop_mods_00069663 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068040/wcd-4-927-2023.pdf https://wcd.copernicus.org/articles/4/927/2023/wcd-4-927-2023.pdf |
long_lat |
ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Pacific Tilting |
geographic_facet |
Pacific Tilting |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Weather and Climate Dynamics -- https://www.weather-climate-dynamics.net/ -- 2698-4016 https://doi.org/10.5194/wcd-4-927-2023 https://noa.gwlb.de/receive/cop_mods_00069663 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068040/wcd-4-927-2023.pdf https://wcd.copernicus.org/articles/4/927/2023/wcd-4-927-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/wcd-4-927-2023 |
container_title |
Weather and Climate Dynamics |
container_volume |
4 |
container_issue |
4 |
container_start_page |
927 |
op_container_end_page |
942 |
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1784276698998505472 |