On the Successiveness of the Two Extreme Cold Events in China during the 2020/21 Winter According to Cold Air Trajectories
Two extreme cold air events successively hit China during 28–31 December 2020 (the late 2020 event) and during 6–8 January 2021 (the early 2021 event), which caused great losses. These two events have received extensive attention in relation to synoptic weather systems and remote forcing. Although i...
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ftdoajarticles:oai:doaj.org/article:6535800aa43d462db1a462ac77d9ce12 2023-05-15T17:07:18+02:00 On the Successiveness of the Two Extreme Cold Events in China during the 2020/21 Winter According to Cold Air Trajectories Leying Zhang Shuxiu Hou Zuowei Xie 2022-11-01T00:00:00Z https://doi.org/10.3390/atmos13111915 https://doaj.org/article/6535800aa43d462db1a462ac77d9ce12 EN eng MDPI AG https://www.mdpi.com/2073-4433/13/11/1915 https://doaj.org/toc/2073-4433 doi:10.3390/atmos13111915 2073-4433 https://doaj.org/article/6535800aa43d462db1a462ac77d9ce12 Atmosphere, Vol 13, Iss 1915, p 1915 (2022) extreme event cold air pathway successive surface cold air piecewise potential vorticity inversion Meteorology. Climatology QC851-999 article 2022 ftdoajarticles https://doi.org/10.3390/atmos13111915 2022-12-30T22:38:30Z Two extreme cold air events successively hit China during 28–31 December 2020 (the late 2020 event) and during 6–8 January 2021 (the early 2021 event), which caused great losses. These two events have received extensive attention in relation to synoptic weather systems and remote forcing. Although it has been noted that a near-surface cool condition can greatly impact tropospheric circulation, its role in the successiveness of two such extreme cold waves remains unclear. This study focused on cold air pathways from the Lagrangian perspective, and explored the potential influence of cold air over the key region in terms of connecting the two cold events using a piecewise potential vorticity inversion. With the obtained results, three cold air sources with three corresponding air routes were identified in the two cold events. The northern pathway dominated the late 2020 event, in which the cold air intruded from the eastern Laptev Sea and moved southward to China. In contrast, the early 2021 event was mainly associated with the northwestern pathway in which the cold air came from the Ural Mountains and moved clockwise. Notably, cold air traveling along the western route from western Lake Balkhash arrived at the north of the Tianshan Mountains earlier and amplified the positive height anomaly in situ. Moreover, such an enhanced positive height anomaly moved the direction of the cold air from the northern and northwestern routes southward and thus played a key role in the successiveness of the two extreme cold events. Article in Journal/Newspaper laptev Laptev Sea ural mountains Directory of Open Access Journals: DOAJ Articles Laptev Sea Western Lake ENVELOPE(-128.106,-128.106,52.663,52.663) Atmosphere 13 11 1915 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
extreme event cold air pathway successive surface cold air piecewise potential vorticity inversion Meteorology. Climatology QC851-999 |
spellingShingle |
extreme event cold air pathway successive surface cold air piecewise potential vorticity inversion Meteorology. Climatology QC851-999 Leying Zhang Shuxiu Hou Zuowei Xie On the Successiveness of the Two Extreme Cold Events in China during the 2020/21 Winter According to Cold Air Trajectories |
topic_facet |
extreme event cold air pathway successive surface cold air piecewise potential vorticity inversion Meteorology. Climatology QC851-999 |
description |
Two extreme cold air events successively hit China during 28–31 December 2020 (the late 2020 event) and during 6–8 January 2021 (the early 2021 event), which caused great losses. These two events have received extensive attention in relation to synoptic weather systems and remote forcing. Although it has been noted that a near-surface cool condition can greatly impact tropospheric circulation, its role in the successiveness of two such extreme cold waves remains unclear. This study focused on cold air pathways from the Lagrangian perspective, and explored the potential influence of cold air over the key region in terms of connecting the two cold events using a piecewise potential vorticity inversion. With the obtained results, three cold air sources with three corresponding air routes were identified in the two cold events. The northern pathway dominated the late 2020 event, in which the cold air intruded from the eastern Laptev Sea and moved southward to China. In contrast, the early 2021 event was mainly associated with the northwestern pathway in which the cold air came from the Ural Mountains and moved clockwise. Notably, cold air traveling along the western route from western Lake Balkhash arrived at the north of the Tianshan Mountains earlier and amplified the positive height anomaly in situ. Moreover, such an enhanced positive height anomaly moved the direction of the cold air from the northern and northwestern routes southward and thus played a key role in the successiveness of the two extreme cold events. |
format |
Article in Journal/Newspaper |
author |
Leying Zhang Shuxiu Hou Zuowei Xie |
author_facet |
Leying Zhang Shuxiu Hou Zuowei Xie |
author_sort |
Leying Zhang |
title |
On the Successiveness of the Two Extreme Cold Events in China during the 2020/21 Winter According to Cold Air Trajectories |
title_short |
On the Successiveness of the Two Extreme Cold Events in China during the 2020/21 Winter According to Cold Air Trajectories |
title_full |
On the Successiveness of the Two Extreme Cold Events in China during the 2020/21 Winter According to Cold Air Trajectories |
title_fullStr |
On the Successiveness of the Two Extreme Cold Events in China during the 2020/21 Winter According to Cold Air Trajectories |
title_full_unstemmed |
On the Successiveness of the Two Extreme Cold Events in China during the 2020/21 Winter According to Cold Air Trajectories |
title_sort |
on the successiveness of the two extreme cold events in china during the 2020/21 winter according to cold air trajectories |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/atmos13111915 https://doaj.org/article/6535800aa43d462db1a462ac77d9ce12 |
long_lat |
ENVELOPE(-128.106,-128.106,52.663,52.663) |
geographic |
Laptev Sea Western Lake |
geographic_facet |
Laptev Sea Western Lake |
genre |
laptev Laptev Sea ural mountains |
genre_facet |
laptev Laptev Sea ural mountains |
op_source |
Atmosphere, Vol 13, Iss 1915, p 1915 (2022) |
op_relation |
https://www.mdpi.com/2073-4433/13/11/1915 https://doaj.org/toc/2073-4433 doi:10.3390/atmos13111915 2073-4433 https://doaj.org/article/6535800aa43d462db1a462ac77d9ce12 |
op_doi |
https://doi.org/10.3390/atmos13111915 |
container_title |
Atmosphere |
container_volume |
13 |
container_issue |
11 |
container_start_page |
1915 |
_version_ |
1766062675003965440 |