Mechanism of the wintertime subseasonal surface air temperature variability over Eurasia
The formation mechanism responsible for the leading mode of the subseasonal variability of wintertime surface air temperature (SAT) over Eurasia is investigated. The leading SAT mode over Eurasia is characterized by a triple pattern with strong cold anomalies centered over northern Eurasia and weake...
Published in: | Environmental Research: Climate |
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Language: | English |
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IOP Publishing
2023
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Online Access: | https://doi.org/10.1088/2752-5295/accd0f https://doaj.org/article/f18c8790f4ce4a6587a66f4c0f65308d |
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ftdoajarticles:oai:doaj.org/article:f18c8790f4ce4a6587a66f4c0f65308d 2023-06-11T04:09:35+02:00 Mechanism of the wintertime subseasonal surface air temperature variability over Eurasia Weina Guan Lin Wang 2023-01-01T00:00:00Z https://doi.org/10.1088/2752-5295/accd0f https://doaj.org/article/f18c8790f4ce4a6587a66f4c0f65308d EN eng IOP Publishing https://doi.org/10.1088/2752-5295/accd0f https://doaj.org/toc/2752-5295 doi:10.1088/2752-5295/accd0f 2752-5295 https://doaj.org/article/f18c8790f4ce4a6587a66f4c0f65308d Environmental Research: Climate, Vol 2, Iss 2, p 025006 (2023) subseasonal variability temperature advection circulation Meteorology. Climatology QC851-999 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.1088/2752-5295/accd0f 2023-05-07T00:34:43Z The formation mechanism responsible for the leading mode of the subseasonal variability of wintertime surface air temperature (SAT) over Eurasia is investigated. The leading SAT mode over Eurasia is characterized by a triple pattern with strong cold anomalies centered over northern Eurasia and weaker warm anomalies over the Arctic and East Asia, respectively, which has a deep barotropic structure and extends from the surface to the upper troposphere. It is tightly coupled to a wave-like atmospheric circulation, which stretches from the North Atlantic to East Asia and resembles the Scandinavia teleconnection pattern. Its formation mechanism is further revealed through the analysis of the temperature budget. The atmospheric circulation-induced horizontal advection is found to be the primary driver of the cold anomalies over northern Eurasia associated with the leading SAT mode in two steps. First, the advection of the climatological temperature by the mode-associated meridional wind anomalies triggers the cooling in the western part of Eurasia. Second, the advection of the above cold anomalies by background westerly winds from west Eurasia to the east further redistributes the cold anomalies. The meridional and zonal advection eventually causes the mode-associated strong cold anomalies over northern Eurasia. Article in Journal/Newspaper Arctic North Atlantic Directory of Open Access Journals: DOAJ Articles Arctic Environmental Research: Climate 2 2 025006 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
subseasonal variability temperature advection circulation Meteorology. Climatology QC851-999 Environmental sciences GE1-350 |
spellingShingle |
subseasonal variability temperature advection circulation Meteorology. Climatology QC851-999 Environmental sciences GE1-350 Weina Guan Lin Wang Mechanism of the wintertime subseasonal surface air temperature variability over Eurasia |
topic_facet |
subseasonal variability temperature advection circulation Meteorology. Climatology QC851-999 Environmental sciences GE1-350 |
description |
The formation mechanism responsible for the leading mode of the subseasonal variability of wintertime surface air temperature (SAT) over Eurasia is investigated. The leading SAT mode over Eurasia is characterized by a triple pattern with strong cold anomalies centered over northern Eurasia and weaker warm anomalies over the Arctic and East Asia, respectively, which has a deep barotropic structure and extends from the surface to the upper troposphere. It is tightly coupled to a wave-like atmospheric circulation, which stretches from the North Atlantic to East Asia and resembles the Scandinavia teleconnection pattern. Its formation mechanism is further revealed through the analysis of the temperature budget. The atmospheric circulation-induced horizontal advection is found to be the primary driver of the cold anomalies over northern Eurasia associated with the leading SAT mode in two steps. First, the advection of the climatological temperature by the mode-associated meridional wind anomalies triggers the cooling in the western part of Eurasia. Second, the advection of the above cold anomalies by background westerly winds from west Eurasia to the east further redistributes the cold anomalies. The meridional and zonal advection eventually causes the mode-associated strong cold anomalies over northern Eurasia. |
format |
Article in Journal/Newspaper |
author |
Weina Guan Lin Wang |
author_facet |
Weina Guan Lin Wang |
author_sort |
Weina Guan |
title |
Mechanism of the wintertime subseasonal surface air temperature variability over Eurasia |
title_short |
Mechanism of the wintertime subseasonal surface air temperature variability over Eurasia |
title_full |
Mechanism of the wintertime subseasonal surface air temperature variability over Eurasia |
title_fullStr |
Mechanism of the wintertime subseasonal surface air temperature variability over Eurasia |
title_full_unstemmed |
Mechanism of the wintertime subseasonal surface air temperature variability over Eurasia |
title_sort |
mechanism of the wintertime subseasonal surface air temperature variability over eurasia |
publisher |
IOP Publishing |
publishDate |
2023 |
url |
https://doi.org/10.1088/2752-5295/accd0f https://doaj.org/article/f18c8790f4ce4a6587a66f4c0f65308d |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_source |
Environmental Research: Climate, Vol 2, Iss 2, p 025006 (2023) |
op_relation |
https://doi.org/10.1088/2752-5295/accd0f https://doaj.org/toc/2752-5295 doi:10.1088/2752-5295/accd0f 2752-5295 https://doaj.org/article/f18c8790f4ce4a6587a66f4c0f65308d |
op_doi |
https://doi.org/10.1088/2752-5295/accd0f |
container_title |
Environmental Research: Climate |
container_volume |
2 |
container_issue |
2 |
container_start_page |
025006 |
_version_ |
1768383534261600256 |