More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice
Southwestern China (SWC) has suffered from increasing frequency of heat wave (HW) in recent summers. While the local drought-HW connection is one obvious mechanism for this change, remote controls remain to be explored. Based on ERA-5 reanalysis, it is found that the SWC summer HWs are significantly...
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ftdoajarticles:oai:doaj.org/article:59bfbb57adf143c8acd163e510604678 2023-09-05T13:16:45+02:00 More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice Kaiqiang Deng Xingwen Jiang Chundi Hu Deliang Chen 2020-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/ab8335 https://doaj.org/article/59bfbb57adf143c8acd163e510604678 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/ab8335 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ab8335 1748-9326 https://doaj.org/article/59bfbb57adf143c8acd163e510604678 Environmental Research Letters, Vol 15, Iss 7, p 074011 (2020) heat wave southwestern China Arctic sea ice teleconnection Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2020 ftdoajarticles https://doi.org/10.1088/1748-9326/ab8335 2023-08-13T00:37:02Z Southwestern China (SWC) has suffered from increasing frequency of heat wave (HW) in recent summers. While the local drought-HW connection is one obvious mechanism for this change, remote controls remain to be explored. Based on ERA-5 reanalysis, it is found that the SWC summer HWs are significantly correlated with sea-ice losses in the Barents Sea, Kara Sea and the Arctic pole. The reduction of Arctic sea ice can cause low pressure anomalies over the polar region due to increased heat-flux exchanges at the sea-air interface, which subsequently triggers southeastward Rossby wave trains propagating from northern Europe to East Asia that induce anomalous anticyclone over SWC. As a result, the North Pacific subtropical high extends westward, accompanied by divergent winds, decreased cloud cover and increased insolation in SWC, which leads to above-normal air temperatures there. In addition, the East Asian westerly jet stream is shifted northward, which enhances (reduces) the moisture convergence in North China (SWC), resulting in prominently drier soil in SWC. Therefore, the sea ice—forced changes in atmospheric circulation and surface conditions favor the occurrences of SWC summer HWs. Article in Journal/Newspaper Arctic Barents Sea Kara Sea Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Barents Sea Kara Sea Pacific Environmental Research Letters 15 7 074011 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
heat wave southwestern China Arctic sea ice teleconnection Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
heat wave southwestern China Arctic sea ice teleconnection Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Kaiqiang Deng Xingwen Jiang Chundi Hu Deliang Chen More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice |
topic_facet |
heat wave southwestern China Arctic sea ice teleconnection Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Southwestern China (SWC) has suffered from increasing frequency of heat wave (HW) in recent summers. While the local drought-HW connection is one obvious mechanism for this change, remote controls remain to be explored. Based on ERA-5 reanalysis, it is found that the SWC summer HWs are significantly correlated with sea-ice losses in the Barents Sea, Kara Sea and the Arctic pole. The reduction of Arctic sea ice can cause low pressure anomalies over the polar region due to increased heat-flux exchanges at the sea-air interface, which subsequently triggers southeastward Rossby wave trains propagating from northern Europe to East Asia that induce anomalous anticyclone over SWC. As a result, the North Pacific subtropical high extends westward, accompanied by divergent winds, decreased cloud cover and increased insolation in SWC, which leads to above-normal air temperatures there. In addition, the East Asian westerly jet stream is shifted northward, which enhances (reduces) the moisture convergence in North China (SWC), resulting in prominently drier soil in SWC. Therefore, the sea ice—forced changes in atmospheric circulation and surface conditions favor the occurrences of SWC summer HWs. |
format |
Article in Journal/Newspaper |
author |
Kaiqiang Deng Xingwen Jiang Chundi Hu Deliang Chen |
author_facet |
Kaiqiang Deng Xingwen Jiang Chundi Hu Deliang Chen |
author_sort |
Kaiqiang Deng |
title |
More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice |
title_short |
More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice |
title_full |
More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice |
title_fullStr |
More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice |
title_full_unstemmed |
More frequent summer heat waves in southwestern China linked to the recent declining of Arctic sea ice |
title_sort |
more frequent summer heat waves in southwestern china linked to the recent declining of arctic sea ice |
publisher |
IOP Publishing |
publishDate |
2020 |
url |
https://doi.org/10.1088/1748-9326/ab8335 https://doaj.org/article/59bfbb57adf143c8acd163e510604678 |
geographic |
Arctic Barents Sea Kara Sea Pacific |
geographic_facet |
Arctic Barents Sea Kara Sea Pacific |
genre |
Arctic Barents Sea Kara Sea Sea ice |
genre_facet |
Arctic Barents Sea Kara Sea Sea ice |
op_source |
Environmental Research Letters, Vol 15, Iss 7, p 074011 (2020) |
op_relation |
https://doi.org/10.1088/1748-9326/ab8335 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ab8335 1748-9326 https://doaj.org/article/59bfbb57adf143c8acd163e510604678 |
op_doi |
https://doi.org/10.1088/1748-9326/ab8335 |
container_title |
Environmental Research Letters |
container_volume |
15 |
container_issue |
7 |
container_start_page |
074011 |
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1776198222189953024 |