Types of Coupling between the Stratospheric Polar Vortex and Tropospheric Polar Vortex, and Tropospheric Circulation Anomalies Associated with Each Type in Boreal Winter
Fifty years of daily ERA5 reanalysis data are employed to investigate the linkages between the strength of the stratospheric polar vortex and the tropospheric polar vortex during the boreal winter. The strong coupling events, anomalies in both the stratospheric and tropospheric polar vortices, can b...
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ftdoajarticles:oai:doaj.org/article:62432507be08492bbe7e2a053d6725f2 2023-10-29T02:38:38+01:00 Types of Coupling between the Stratospheric Polar Vortex and Tropospheric Polar Vortex, and Tropospheric Circulation Anomalies Associated with Each Type in Boreal Winter Lixin Han Chunhua Shi Dong Guo 2023-09-01T00:00:00Z https://doi.org/10.3390/rs15184367 https://doaj.org/article/62432507be08492bbe7e2a053d6725f2 EN eng MDPI AG https://www.mdpi.com/2072-4292/15/18/4367 https://doaj.org/toc/2072-4292 doi:10.3390/rs15184367 2072-4292 https://doaj.org/article/62432507be08492bbe7e2a053d6725f2 Remote Sensing, Vol 15, Iss 4367, p 4367 (2023) interaction between the stratosphere and the troposphere polar vortex planetary wave atmospheric circulation Science Q article 2023 ftdoajarticles https://doi.org/10.3390/rs15184367 2023-10-01T00:37:05Z Fifty years of daily ERA5 reanalysis data are employed to investigate the linkages between the strength of the stratospheric polar vortex and the tropospheric polar vortex during the boreal winter. The strong coupling events, anomalies in both the stratospheric and tropospheric polar vortices, can be classified into four configurations, each representing the distinct characteristics of planetary wave vertical propagation and tropospheric circulation anomalies. The findings reveal the following patterns: (1) Strong stratospheric polar vortex and weak tropospheric polar vortex periods are associated with anomalous downward E-P flux from the stratosphere to the troposphere, predominantly induced by planetary waves 1 and 2. Warm anomalies occur along the North Atlantic coasts, while cold anomalies are evident over Eastern Europe and East Asia at the surface. (2) Weak stratospheric polar vortex and strong tropospheric polar vortex periods exhibit anomalous upward E-P flux in high latitudes, with dominant wave 1, and anomalous downward E-P flux in the middle latitudes, dominated by wave 2. Warm anomalies are observed over North America, Western Europe, and the northern side of the Gulf of Oman at the surface. (3) Strong stratospheric polar vortex and strong tropospheric polar vortex periods feature anomalous downward E-P flux in high latitudes, dominated by wave 1, and anomalous upward E-P flux in middle latitudes, with a wave 2 predominance. Warm anomalies prevail over Northeast Asia, Southern Europe, and North America at the surface. (4) Weak stratospheric polar vortex and weak tropospheric polar vortex periods display anomalous upward E-P flux in mid-to-high latitudes, predominantly with wave 1. In contrast to the tropospheric circulation anomalies observed in the third category, this pattern results in the presence of cold anomalies over Northeast Asia, Southern Europe, and North America. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Remote Sensing 15 18 4367 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
interaction between the stratosphere and the troposphere polar vortex planetary wave atmospheric circulation Science Q |
spellingShingle |
interaction between the stratosphere and the troposphere polar vortex planetary wave atmospheric circulation Science Q Lixin Han Chunhua Shi Dong Guo Types of Coupling between the Stratospheric Polar Vortex and Tropospheric Polar Vortex, and Tropospheric Circulation Anomalies Associated with Each Type in Boreal Winter |
topic_facet |
interaction between the stratosphere and the troposphere polar vortex planetary wave atmospheric circulation Science Q |
description |
Fifty years of daily ERA5 reanalysis data are employed to investigate the linkages between the strength of the stratospheric polar vortex and the tropospheric polar vortex during the boreal winter. The strong coupling events, anomalies in both the stratospheric and tropospheric polar vortices, can be classified into four configurations, each representing the distinct characteristics of planetary wave vertical propagation and tropospheric circulation anomalies. The findings reveal the following patterns: (1) Strong stratospheric polar vortex and weak tropospheric polar vortex periods are associated with anomalous downward E-P flux from the stratosphere to the troposphere, predominantly induced by planetary waves 1 and 2. Warm anomalies occur along the North Atlantic coasts, while cold anomalies are evident over Eastern Europe and East Asia at the surface. (2) Weak stratospheric polar vortex and strong tropospheric polar vortex periods exhibit anomalous upward E-P flux in high latitudes, with dominant wave 1, and anomalous downward E-P flux in the middle latitudes, dominated by wave 2. Warm anomalies are observed over North America, Western Europe, and the northern side of the Gulf of Oman at the surface. (3) Strong stratospheric polar vortex and strong tropospheric polar vortex periods feature anomalous downward E-P flux in high latitudes, dominated by wave 1, and anomalous upward E-P flux in middle latitudes, with a wave 2 predominance. Warm anomalies prevail over Northeast Asia, Southern Europe, and North America at the surface. (4) Weak stratospheric polar vortex and weak tropospheric polar vortex periods display anomalous upward E-P flux in mid-to-high latitudes, predominantly with wave 1. In contrast to the tropospheric circulation anomalies observed in the third category, this pattern results in the presence of cold anomalies over Northeast Asia, Southern Europe, and North America. |
format |
Article in Journal/Newspaper |
author |
Lixin Han Chunhua Shi Dong Guo |
author_facet |
Lixin Han Chunhua Shi Dong Guo |
author_sort |
Lixin Han |
title |
Types of Coupling between the Stratospheric Polar Vortex and Tropospheric Polar Vortex, and Tropospheric Circulation Anomalies Associated with Each Type in Boreal Winter |
title_short |
Types of Coupling between the Stratospheric Polar Vortex and Tropospheric Polar Vortex, and Tropospheric Circulation Anomalies Associated with Each Type in Boreal Winter |
title_full |
Types of Coupling between the Stratospheric Polar Vortex and Tropospheric Polar Vortex, and Tropospheric Circulation Anomalies Associated with Each Type in Boreal Winter |
title_fullStr |
Types of Coupling between the Stratospheric Polar Vortex and Tropospheric Polar Vortex, and Tropospheric Circulation Anomalies Associated with Each Type in Boreal Winter |
title_full_unstemmed |
Types of Coupling between the Stratospheric Polar Vortex and Tropospheric Polar Vortex, and Tropospheric Circulation Anomalies Associated with Each Type in Boreal Winter |
title_sort |
types of coupling between the stratospheric polar vortex and tropospheric polar vortex, and tropospheric circulation anomalies associated with each type in boreal winter |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/rs15184367 https://doaj.org/article/62432507be08492bbe7e2a053d6725f2 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Remote Sensing, Vol 15, Iss 4367, p 4367 (2023) |
op_relation |
https://www.mdpi.com/2072-4292/15/18/4367 https://doaj.org/toc/2072-4292 doi:10.3390/rs15184367 2072-4292 https://doaj.org/article/62432507be08492bbe7e2a053d6725f2 |
op_doi |
https://doi.org/10.3390/rs15184367 |
container_title |
Remote Sensing |
container_volume |
15 |
container_issue |
18 |
container_start_page |
4367 |
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1781064836176674816 |