Collaborative impact of the NAO and atmospheric blocking on European heatwaves, with a focus on the hot summer of 2018
Two intense heatwaves of July and early August 2018 are found to be associated with a European blocking (EB) event accompanied by a series of consecutive positive North Atlantic Oscillation (NAO ^+ ) events. Further analyses show that the collaborative role of an EB event and its upstream NAO ^+ pat...
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ftdoajarticles:oai:doaj.org/article:172f268ec49048e295fcf662547c577b 2023-09-05T13:21:39+02:00 Collaborative impact of the NAO and atmospheric blocking on European heatwaves, with a focus on the hot summer of 2018 Muyuan Li Yao Yao Ian Simmonds Dehai Luo Linhao Zhong Xiaodan Chen 2020-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/aba6ad https://doaj.org/article/172f268ec49048e295fcf662547c577b EN eng IOP Publishing https://doi.org/10.1088/1748-9326/aba6ad https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/aba6ad 1748-9326 https://doaj.org/article/172f268ec49048e295fcf662547c577b Environmental Research Letters, Vol 15, Iss 11, p 114003 (2020) European heatwave NAO atmospheric blocking collaborative impact weather extremes 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/aba6ad 2023-08-13T00:37:16Z Two intense heatwaves of July and early August 2018 are found to be associated with a European blocking (EB) event accompanied by a series of consecutive positive North Atlantic Oscillation (NAO ^+ ) events. Further analyses show that the collaborative role of an EB event and its upstream NAO ^+ pattern could increase the frequency, persistence, magnitude and scale of heatwaves over Europe. Compared with NAO ^+ -unrelated EB events, NAO ^+ -related EB events are less movable (quasi-stationary) and more persistent over Europe, which could contribute to an increase in the intensity and persistence of heatwaves. In addition, the blocking high of this type has a northeast–southwest orientation with stronger warm airflow and less precipitation in northern and western Europe, where large scopes of higher temperatures tend to occur. In contrast, NAO ^+ -unrelated EB events without orientation correspond to a trough in the south, which results in increased precipitation and cold air in the southern part of Europe, and thus high temperatures contract to the northern part of Europe. Moreover, considering that the NAO ^+ pattern leads the formation of an EB event, the NAO ^+ pattern might serve as a potential predictor for European heatwaves. Our conclusions are strongly supported by the analysis of CMIP6 historical simulations which also capture the differences of high temperatures and atmospheric circulations between NAO ^+ -related EB events and NAO ^+ -unrelated EB events. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Environmental Research Letters 15 11 114003 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
European heatwave NAO atmospheric blocking collaborative impact weather extremes teleconnection Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
European heatwave NAO atmospheric blocking collaborative impact weather extremes teleconnection Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Muyuan Li Yao Yao Ian Simmonds Dehai Luo Linhao Zhong Xiaodan Chen Collaborative impact of the NAO and atmospheric blocking on European heatwaves, with a focus on the hot summer of 2018 |
topic_facet |
European heatwave NAO atmospheric blocking collaborative impact weather extremes teleconnection Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Two intense heatwaves of July and early August 2018 are found to be associated with a European blocking (EB) event accompanied by a series of consecutive positive North Atlantic Oscillation (NAO ^+ ) events. Further analyses show that the collaborative role of an EB event and its upstream NAO ^+ pattern could increase the frequency, persistence, magnitude and scale of heatwaves over Europe. Compared with NAO ^+ -unrelated EB events, NAO ^+ -related EB events are less movable (quasi-stationary) and more persistent over Europe, which could contribute to an increase in the intensity and persistence of heatwaves. In addition, the blocking high of this type has a northeast–southwest orientation with stronger warm airflow and less precipitation in northern and western Europe, where large scopes of higher temperatures tend to occur. In contrast, NAO ^+ -unrelated EB events without orientation correspond to a trough in the south, which results in increased precipitation and cold air in the southern part of Europe, and thus high temperatures contract to the northern part of Europe. Moreover, considering that the NAO ^+ pattern leads the formation of an EB event, the NAO ^+ pattern might serve as a potential predictor for European heatwaves. Our conclusions are strongly supported by the analysis of CMIP6 historical simulations which also capture the differences of high temperatures and atmospheric circulations between NAO ^+ -related EB events and NAO ^+ -unrelated EB events. |
format |
Article in Journal/Newspaper |
author |
Muyuan Li Yao Yao Ian Simmonds Dehai Luo Linhao Zhong Xiaodan Chen |
author_facet |
Muyuan Li Yao Yao Ian Simmonds Dehai Luo Linhao Zhong Xiaodan Chen |
author_sort |
Muyuan Li |
title |
Collaborative impact of the NAO and atmospheric blocking on European heatwaves, with a focus on the hot summer of 2018 |
title_short |
Collaborative impact of the NAO and atmospheric blocking on European heatwaves, with a focus on the hot summer of 2018 |
title_full |
Collaborative impact of the NAO and atmospheric blocking on European heatwaves, with a focus on the hot summer of 2018 |
title_fullStr |
Collaborative impact of the NAO and atmospheric blocking on European heatwaves, with a focus on the hot summer of 2018 |
title_full_unstemmed |
Collaborative impact of the NAO and atmospheric blocking on European heatwaves, with a focus on the hot summer of 2018 |
title_sort |
collaborative impact of the nao and atmospheric blocking on european heatwaves, with a focus on the hot summer of 2018 |
publisher |
IOP Publishing |
publishDate |
2020 |
url |
https://doi.org/10.1088/1748-9326/aba6ad https://doaj.org/article/172f268ec49048e295fcf662547c577b |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Environmental Research Letters, Vol 15, Iss 11, p 114003 (2020) |
op_relation |
https://doi.org/10.1088/1748-9326/aba6ad https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/aba6ad 1748-9326 https://doaj.org/article/172f268ec49048e295fcf662547c577b |
op_doi |
https://doi.org/10.1088/1748-9326/aba6ad |
container_title |
Environmental Research Letters |
container_volume |
15 |
container_issue |
11 |
container_start_page |
114003 |
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1776202248220573696 |