Extreme heatwave over Eastern China in summer 2022: the role of three oceans and local soil moisture feedback
Eastern China experienced persistent regional extreme heatwaves in the summer of 2022, with disparate spatial features and formation mechanisms in different months. We quantitatively assessed the relative contributions of three oceans, i.e. tropical Indian Ocean and Pacific and North Atlantic, and t...
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ftdoajarticles:oai:doaj.org/article:c95091969e2842c0b4ba8358f1dc76b3 2023-09-05T13:21:20+02:00 Extreme heatwave over Eastern China in summer 2022: the role of three oceans and local soil moisture feedback Jilan Jiang Yimin Liu Jiangyu Mao Guoxiong Wu 2023-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/acc5fb https://doaj.org/article/c95091969e2842c0b4ba8358f1dc76b3 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/acc5fb https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/acc5fb 1748-9326 https://doaj.org/article/c95091969e2842c0b4ba8358f1dc76b3 Environmental Research Letters, Vol 18, Iss 4, p 044025 (2023) extreme heatwaves Indo-Pacific SSTAs North Atlantic SSTAs local soil moisture–temperature feedback Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2023 ftdoajarticles https://doi.org/10.1088/1748-9326/acc5fb 2023-08-13T00:36:58Z Eastern China experienced persistent regional extreme heatwaves in the summer of 2022, with disparate spatial features and formation mechanisms in different months. We quantitatively assessed the relative contributions of three oceans, i.e. tropical Indian Ocean and Pacific and North Atlantic, and the local soil moisture–temperature feedback using linear regression. The results showed that the monthly mean atmospheric circulation anomalies failed to explain the extreme heatwave in June 2022. The combined contribution of the tropical Indo-Pacific and North Atlantic sea surface temperature anomalies (SSTAs), together with the local soil moisture–temperature feedback, explaining approximately 10% of the temperature anomalies. In July, the tropical Indo-Pacific SSTAs promoted anomalous atmospheric circulation and extreme heat via meridional circulation originating in the Maritime Continent, accounting for approximately 10% of the temperature anomalies, with North Atlantic SSTAs contributing the same percentage by a mid-latitude steady Rossby wave. Local soil moisture–temperature feedback accounted for 42% of the anomalies. The tropical Indo-Pacific SSTAs produced a strong western North Pacific anticyclone in August, but their direct contribution to the temperature anomalies was negligible. The North Atlantic SSTAs contributed 9% of the total via the mid-latitude steady Rossby wave. Local soil moisture–temperature feedback contributed 66%, suggesting that the July heatwave and drought exerted a significant impact on the subsequent August extreme heatwave. Global warming has greatly facilitated extreme heatwaves, accounting for about 30%–40% of these events in summer 2022. These results also suggest that the climatic effects of tropical Indo-Pacific and North Atlantic SSTAs on Eastern China are evident in the month-to-month variation in summer. Our results thus contribute to the understanding and prediction of extreme heatwaves in Eastern China. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Indian Pacific Environmental Research Letters 18 4 044025 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
extreme heatwaves Indo-Pacific SSTAs North Atlantic SSTAs local soil moisture–temperature feedback Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
extreme heatwaves Indo-Pacific SSTAs North Atlantic SSTAs local soil moisture–temperature feedback Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Jilan Jiang Yimin Liu Jiangyu Mao Guoxiong Wu Extreme heatwave over Eastern China in summer 2022: the role of three oceans and local soil moisture feedback |
topic_facet |
extreme heatwaves Indo-Pacific SSTAs North Atlantic SSTAs local soil moisture–temperature feedback Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Eastern China experienced persistent regional extreme heatwaves in the summer of 2022, with disparate spatial features and formation mechanisms in different months. We quantitatively assessed the relative contributions of three oceans, i.e. tropical Indian Ocean and Pacific and North Atlantic, and the local soil moisture–temperature feedback using linear regression. The results showed that the monthly mean atmospheric circulation anomalies failed to explain the extreme heatwave in June 2022. The combined contribution of the tropical Indo-Pacific and North Atlantic sea surface temperature anomalies (SSTAs), together with the local soil moisture–temperature feedback, explaining approximately 10% of the temperature anomalies. In July, the tropical Indo-Pacific SSTAs promoted anomalous atmospheric circulation and extreme heat via meridional circulation originating in the Maritime Continent, accounting for approximately 10% of the temperature anomalies, with North Atlantic SSTAs contributing the same percentage by a mid-latitude steady Rossby wave. Local soil moisture–temperature feedback accounted for 42% of the anomalies. The tropical Indo-Pacific SSTAs produced a strong western North Pacific anticyclone in August, but their direct contribution to the temperature anomalies was negligible. The North Atlantic SSTAs contributed 9% of the total via the mid-latitude steady Rossby wave. Local soil moisture–temperature feedback contributed 66%, suggesting that the July heatwave and drought exerted a significant impact on the subsequent August extreme heatwave. Global warming has greatly facilitated extreme heatwaves, accounting for about 30%–40% of these events in summer 2022. These results also suggest that the climatic effects of tropical Indo-Pacific and North Atlantic SSTAs on Eastern China are evident in the month-to-month variation in summer. Our results thus contribute to the understanding and prediction of extreme heatwaves in Eastern China. |
format |
Article in Journal/Newspaper |
author |
Jilan Jiang Yimin Liu Jiangyu Mao Guoxiong Wu |
author_facet |
Jilan Jiang Yimin Liu Jiangyu Mao Guoxiong Wu |
author_sort |
Jilan Jiang |
title |
Extreme heatwave over Eastern China in summer 2022: the role of three oceans and local soil moisture feedback |
title_short |
Extreme heatwave over Eastern China in summer 2022: the role of three oceans and local soil moisture feedback |
title_full |
Extreme heatwave over Eastern China in summer 2022: the role of three oceans and local soil moisture feedback |
title_fullStr |
Extreme heatwave over Eastern China in summer 2022: the role of three oceans and local soil moisture feedback |
title_full_unstemmed |
Extreme heatwave over Eastern China in summer 2022: the role of three oceans and local soil moisture feedback |
title_sort |
extreme heatwave over eastern china in summer 2022: the role of three oceans and local soil moisture feedback |
publisher |
IOP Publishing |
publishDate |
2023 |
url |
https://doi.org/10.1088/1748-9326/acc5fb https://doaj.org/article/c95091969e2842c0b4ba8358f1dc76b3 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Environmental Research Letters, Vol 18, Iss 4, p 044025 (2023) |
op_relation |
https://doi.org/10.1088/1748-9326/acc5fb https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/acc5fb 1748-9326 https://doaj.org/article/c95091969e2842c0b4ba8358f1dc76b3 |
op_doi |
https://doi.org/10.1088/1748-9326/acc5fb |
container_title |
Environmental Research Letters |
container_volume |
18 |
container_issue |
4 |
container_start_page |
044025 |
_version_ |
1776201946805305344 |