An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China
Eurasian spring snow cover is widely considered as an important predictor of Asian summer monsoon rainfall, but its possible role in the formation of the north–south dipole structure of rainfall anomalies (NSDR)—a major mode of the eastern China summer rainfall variability—remains elusive. Here, we...
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Online Access: | https://doi.org/10.1088/1748-9326/abf688 https://doaj.org/article/d1cceb5cfd924893bc63372c37de8c1c |
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ftdoajarticles:oai:doaj.org/article:d1cceb5cfd924893bc63372c37de8c1c 2023-09-05T13:21:28+02:00 An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China Taotao Zhang Tao Wang Yingying Feng Xichen Li Gerhard Krinner 2021-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/abf688 https://doaj.org/article/d1cceb5cfd924893bc63372c37de8c1c EN eng IOP Publishing https://doi.org/10.1088/1748-9326/abf688 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/abf688 1748-9326 https://doaj.org/article/d1cceb5cfd924893bc63372c37de8c1c Environmental Research Letters, Vol 16, Iss 5, p 054012 (2021) Eurasian snow cover Eastern China summer rainfall summer North Atlantic Oscillation emerging impact Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2021 ftdoajarticles https://doi.org/10.1088/1748-9326/abf688 2023-08-13T00:37:14Z Eurasian spring snow cover is widely considered as an important predictor of Asian summer monsoon rainfall, but its possible role in the formation of the north–south dipole structure of rainfall anomalies (NSDR)—a major mode of the eastern China summer rainfall variability—remains elusive. Here, we show that, there is a close connection between the western Eurasian spring snow cover (WESS) and NSDR during our research period 1967–2018, with less WESS tends to be accompanied by a wetter south-drier north pattern over eastern China, and vice versa. However, this relationship was not significant before the late 1990s, but has since become significant. Further analyses demonstrate that the shift in the WESS–NSDR relationship could be attributed to the modulation of summer North Atlantic Oscillation (SNAO). After the late 1990s, the WESS-related anomalous atmospheric circulations during summer are largely reinforced by the constructive superposition of those with same signs induced by SNAO, which in turn would intensify the impact of WESS and hence lead to a strong WESS–NSDR connection. In contrast, the influences of WESS are counteracted by those with opposite signs associated with SNAO before the late 1990s and thereby result in a weak snow–rainfall relationship. Our findings, along with the decline in Eurasian spring snow cover, provide a potential explanation for the recent ‘South Flood–North Drought’ pattern observed over eastern China. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Environmental Research Letters 16 5 054012 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Eurasian snow cover Eastern China summer rainfall summer North Atlantic Oscillation emerging impact Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
Eurasian snow cover Eastern China summer rainfall summer North Atlantic Oscillation emerging impact Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Taotao Zhang Tao Wang Yingying Feng Xichen Li Gerhard Krinner An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China |
topic_facet |
Eurasian snow cover Eastern China summer rainfall summer North Atlantic Oscillation emerging impact Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Eurasian spring snow cover is widely considered as an important predictor of Asian summer monsoon rainfall, but its possible role in the formation of the north–south dipole structure of rainfall anomalies (NSDR)—a major mode of the eastern China summer rainfall variability—remains elusive. Here, we show that, there is a close connection between the western Eurasian spring snow cover (WESS) and NSDR during our research period 1967–2018, with less WESS tends to be accompanied by a wetter south-drier north pattern over eastern China, and vice versa. However, this relationship was not significant before the late 1990s, but has since become significant. Further analyses demonstrate that the shift in the WESS–NSDR relationship could be attributed to the modulation of summer North Atlantic Oscillation (SNAO). After the late 1990s, the WESS-related anomalous atmospheric circulations during summer are largely reinforced by the constructive superposition of those with same signs induced by SNAO, which in turn would intensify the impact of WESS and hence lead to a strong WESS–NSDR connection. In contrast, the influences of WESS are counteracted by those with opposite signs associated with SNAO before the late 1990s and thereby result in a weak snow–rainfall relationship. Our findings, along with the decline in Eurasian spring snow cover, provide a potential explanation for the recent ‘South Flood–North Drought’ pattern observed over eastern China. |
format |
Article in Journal/Newspaper |
author |
Taotao Zhang Tao Wang Yingying Feng Xichen Li Gerhard Krinner |
author_facet |
Taotao Zhang Tao Wang Yingying Feng Xichen Li Gerhard Krinner |
author_sort |
Taotao Zhang |
title |
An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China |
title_short |
An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China |
title_full |
An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China |
title_fullStr |
An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China |
title_full_unstemmed |
An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China |
title_sort |
emerging impact of eurasian spring snow cover on summer rainfall in eastern china |
publisher |
IOP Publishing |
publishDate |
2021 |
url |
https://doi.org/10.1088/1748-9326/abf688 https://doaj.org/article/d1cceb5cfd924893bc63372c37de8c1c |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Environmental Research Letters, Vol 16, Iss 5, p 054012 (2021) |
op_relation |
https://doi.org/10.1088/1748-9326/abf688 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/abf688 1748-9326 https://doaj.org/article/d1cceb5cfd924893bc63372c37de8c1c |
op_doi |
https://doi.org/10.1088/1748-9326/abf688 |
container_title |
Environmental Research Letters |
container_volume |
16 |
container_issue |
5 |
container_start_page |
054012 |
_version_ |
1776202070705045504 |