Effect of the El Niño Decaying Pace on the East Asian Summer Monsoon Circulation Pattern during Post-El Niño Summers
El Niño events vary from case to case with different decaying paces. In this study, we demonstrate that the different El Niño decaying paces have distinct impacts on the East Asian monsoon circulation pattern during post-El Niño summers. For fast decaying (FD) El Niño summers, a large-scale anomalou...
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doaj-af289888ffc846898b58ce94b799b5752021-01-23T00:06:14ZengMDPI AGAtmosphere2073-44332021-01-011214014010.3390/atmos12020140Effect of the El Niño Decaying Pace on the East Asian Summer Monsoon Circulation Pattern during Post-El Niño SummersWenping Jiang0Gen Li1Gongjie Wang2Key Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources/College of Oceanography/Key Laboratory of Ministry of Education for Coastal Disaster and Protection, Hohai University, Nanjing 210024, ChinaKey Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources/College of Oceanography/Key Laboratory of Ministry of Education for Coastal Disaster and Protection, Hohai University, Nanjing 210024, ChinaPeople’s Liberation Army 66199 Troops, Beijing 100043, ChinaEl Niño events vary from case to case with different decaying paces. In this study, we demonstrate that the different El Niño decaying paces have distinct impacts on the East Asian monsoon circulation pattern during post-El Niño summers. For fast decaying (FD) El Niño summers, a large-scale anomalous anticyclone dominates over East Asia and the North Pacific from subtropical to mid-latitude; whereas, the East Asian monsoon circulation display a dipole pattern with anomalous northern cyclone and southern anticyclone for slow decaying (SD) El Niño summers. The difference in anomalous East Asian monsoon circulation patterns was closely associated with the sea surface temperature (SST) anomaly patterns in the tropics. In FD El Niño summers, the cold SST anomalies in the tropical central-eastern Pacific and warm SST anomalies in the Maritime Continent induce the anticyclone anomalies over the Northwest Pacific. In contrast, the warm Kelvin wave anchored over the tropical Indian Ocean during SD El Niño summers plays a crucial role in sustaining the anticyclone anomalies over the Northwest Pacific. In particular, the opposite atmospheric circulation anomaly patterns over Northeast Asia and the mid-latitude North Pacific are mainly modulated by the stationary Rossby wave trains triggered by the opposite SST anomalies in the tropical eastern Pacific during FD and SD El Niño summers. Finally, the effect of distinct summer monsoon circulation patterns associated with the El Niño decay pace on the summer climate over East Asia are also discussed.https://www.mdpi.com/2073-4433/12/2/140El Niñodecaying paceEast Asian monsoon circulationpost-El Niño summers |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wenping Jiang Gen Li Gongjie Wang |
spellingShingle |
Wenping Jiang Gen Li Gongjie Wang Effect of the El Niño Decaying Pace on the East Asian Summer Monsoon Circulation Pattern during Post-El Niño Summers Atmosphere El Niño decaying pace East Asian monsoon circulation post-El Niño summers |
author_facet |
Wenping Jiang Gen Li Gongjie Wang |
author_sort |
Wenping Jiang |
title |
Effect of the El Niño Decaying Pace on the East Asian Summer Monsoon Circulation Pattern during Post-El Niño Summers |
title_short |
Effect of the El Niño Decaying Pace on the East Asian Summer Monsoon Circulation Pattern during Post-El Niño Summers |
title_full |
Effect of the El Niño Decaying Pace on the East Asian Summer Monsoon Circulation Pattern during Post-El Niño Summers |
title_fullStr |
Effect of the El Niño Decaying Pace on the East Asian Summer Monsoon Circulation Pattern during Post-El Niño Summers |
title_full_unstemmed |
Effect of the El Niño Decaying Pace on the East Asian Summer Monsoon Circulation Pattern during Post-El Niño Summers |
title_sort |
effect of the el niño decaying pace on the east asian summer monsoon circulation pattern during post-el niño summers |
publisher |
MDPI AG |
series |
Atmosphere |
issn |
2073-4433 |
publishDate |
2021-01-01 |
description |
El Niño events vary from case to case with different decaying paces. In this study, we demonstrate that the different El Niño decaying paces have distinct impacts on the East Asian monsoon circulation pattern during post-El Niño summers. For fast decaying (FD) El Niño summers, a large-scale anomalous anticyclone dominates over East Asia and the North Pacific from subtropical to mid-latitude; whereas, the East Asian monsoon circulation display a dipole pattern with anomalous northern cyclone and southern anticyclone for slow decaying (SD) El Niño summers. The difference in anomalous East Asian monsoon circulation patterns was closely associated with the sea surface temperature (SST) anomaly patterns in the tropics. In FD El Niño summers, the cold SST anomalies in the tropical central-eastern Pacific and warm SST anomalies in the Maritime Continent induce the anticyclone anomalies over the Northwest Pacific. In contrast, the warm Kelvin wave anchored over the tropical Indian Ocean during SD El Niño summers plays a crucial role in sustaining the anticyclone anomalies over the Northwest Pacific. In particular, the opposite atmospheric circulation anomaly patterns over Northeast Asia and the mid-latitude North Pacific are mainly modulated by the stationary Rossby wave trains triggered by the opposite SST anomalies in the tropical eastern Pacific during FD and SD El Niño summers. Finally, the effect of distinct summer monsoon circulation patterns associated with the El Niño decay pace on the summer climate over East Asia are also discussed. |
topic |
El Niño decaying pace East Asian monsoon circulation post-El Niño summers |
url |
https://www.mdpi.com/2073-4433/12/2/140 |
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