Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective
From 26 November to 1 December 2022, intense cold air masses swept across China from northwest to south, resulting in a nationwide cold air outbreak (CAO) case characterised by drastic and sudden temperature drops with rain, snow and strong winds. The physical processes that dominate the intensifica...
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2023
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Online Access: | https://doi.org/10.1016/j.accre.2023.08.009 https://doaj.org/article/9674ba47d55f4dafbc8a45128b05eb97 |
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ftdoajarticles:oai:doaj.org/article:9674ba47d55f4dafbc8a45128b05eb97 2023-12-10T09:52:17+01:00 Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective Jin-Ning Che Bo Liu Shang-Feng Li Cheng You Kara Hartig Lei Chen 2023-10-01T00:00:00Z https://doi.org/10.1016/j.accre.2023.08.009 https://doaj.org/article/9674ba47d55f4dafbc8a45128b05eb97 EN eng KeAi Communications Co., Ltd. http://www.sciencedirect.com/science/article/pii/S1674927823000989 https://doaj.org/toc/1674-9278 1674-9278 doi:10.1016/j.accre.2023.08.009 https://doaj.org/article/9674ba47d55f4dafbc8a45128b05eb97 Advances in Climate Change Research, Vol 14, Iss 5, Pp 681-690 (2023) Cold air outbreak HYSPLIT Dry static energy Temperature tendency Diabatic heating Meteorology. Climatology QC851-999 Social sciences (General) H1-99 article 2023 ftdoajarticles https://doi.org/10.1016/j.accre.2023.08.009 2023-11-12T01:37:57Z From 26 November to 1 December 2022, intense cold air masses swept across China from northwest to south, resulting in a nationwide cold air outbreak (CAO) case characterised by drastic and sudden temperature drops with rain, snow and strong winds. The physical processes that dominate the intensification of the cold air masses during this CAO event remain unclear. In this study, the evolution of the CAO case, which is indicated by the dry static energy (DSE), is investigated using a novel approach in the framework of Lagrangian backtracking. The dominant processes can be identified by decomposing the DSE change into four diabatic heating terms due to shortwave radiation, longwave radiation, latent heat and turbulent processes. Overall, in this case, most of the cold air parcels originated from the east of Novaya Zemlya and crossed Central Siberia before reaching China. Thus, these air parcels mainly manifested on the northwest‒southeast path. The duration of the cold air intensification differed between subregions. The cold air parcels experienced long cooling periods (approximately 9 d) before reaching northern China (i.e. Northwest, North and Northeast China), whilst the southern parts (i.e. Central, East and South China) underwent relatively short cooling periods (6–8 d). Accordingly, the cold air affecting northern China is more intense than that affecting the southern parts, especially for East and South China. For all six subregions, longwave radiative cooling is identified as the dominant contributor to the cold air intensification, and the latent heat processes as the secondary contributor. The weakening of cold air parcels as they approach and pass over these regions is driven by turbulent processes and shortwave heating. Central Siberia and Lake Baikal are identified as key areas for the intensification of cold air passing over both regions. In addition, air parcels affecting Northwest China are intensely cooled as they pass over the Junggar Basin, while the North China Plain is a key area for cooling ... Article in Journal/Newspaper Novaya Zemlya Siberia Directory of Open Access Journals: DOAJ Articles Advances in Climate Change Research 14 5 681 690 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Cold air outbreak HYSPLIT Dry static energy Temperature tendency Diabatic heating Meteorology. Climatology QC851-999 Social sciences (General) H1-99 |
spellingShingle |
Cold air outbreak HYSPLIT Dry static energy Temperature tendency Diabatic heating Meteorology. Climatology QC851-999 Social sciences (General) H1-99 Jin-Ning Che Bo Liu Shang-Feng Li Cheng You Kara Hartig Lei Chen Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective |
topic_facet |
Cold air outbreak HYSPLIT Dry static energy Temperature tendency Diabatic heating Meteorology. Climatology QC851-999 Social sciences (General) H1-99 |
description |
From 26 November to 1 December 2022, intense cold air masses swept across China from northwest to south, resulting in a nationwide cold air outbreak (CAO) case characterised by drastic and sudden temperature drops with rain, snow and strong winds. The physical processes that dominate the intensification of the cold air masses during this CAO event remain unclear. In this study, the evolution of the CAO case, which is indicated by the dry static energy (DSE), is investigated using a novel approach in the framework of Lagrangian backtracking. The dominant processes can be identified by decomposing the DSE change into four diabatic heating terms due to shortwave radiation, longwave radiation, latent heat and turbulent processes. Overall, in this case, most of the cold air parcels originated from the east of Novaya Zemlya and crossed Central Siberia before reaching China. Thus, these air parcels mainly manifested on the northwest‒southeast path. The duration of the cold air intensification differed between subregions. The cold air parcels experienced long cooling periods (approximately 9 d) before reaching northern China (i.e. Northwest, North and Northeast China), whilst the southern parts (i.e. Central, East and South China) underwent relatively short cooling periods (6–8 d). Accordingly, the cold air affecting northern China is more intense than that affecting the southern parts, especially for East and South China. For all six subregions, longwave radiative cooling is identified as the dominant contributor to the cold air intensification, and the latent heat processes as the secondary contributor. The weakening of cold air parcels as they approach and pass over these regions is driven by turbulent processes and shortwave heating. Central Siberia and Lake Baikal are identified as key areas for the intensification of cold air passing over both regions. In addition, air parcels affecting Northwest China are intensely cooled as they pass over the Junggar Basin, while the North China Plain is a key area for cooling ... |
format |
Article in Journal/Newspaper |
author |
Jin-Ning Che Bo Liu Shang-Feng Li Cheng You Kara Hartig Lei Chen |
author_facet |
Jin-Ning Che Bo Liu Shang-Feng Li Cheng You Kara Hartig Lei Chen |
author_sort |
Jin-Ning Che |
title |
Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective |
title_short |
Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective |
title_full |
Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective |
title_fullStr |
Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective |
title_full_unstemmed |
Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective |
title_sort |
understanding the physical processes in the evolution of a cold air outbreak over china in late november 2022 from a lagrangian perspective |
publisher |
KeAi Communications Co., Ltd. |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.accre.2023.08.009 https://doaj.org/article/9674ba47d55f4dafbc8a45128b05eb97 |
genre |
Novaya Zemlya Siberia |
genre_facet |
Novaya Zemlya Siberia |
op_source |
Advances in Climate Change Research, Vol 14, Iss 5, Pp 681-690 (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1674927823000989 https://doaj.org/toc/1674-9278 1674-9278 doi:10.1016/j.accre.2023.08.009 https://doaj.org/article/9674ba47d55f4dafbc8a45128b05eb97 |
op_doi |
https://doi.org/10.1016/j.accre.2023.08.009 |
container_title |
Advances in Climate Change Research |
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14 |
container_issue |
5 |
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681 |
op_container_end_page |
690 |
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