China coasts facing more tropical cyclone risks during the second decaying summer of double-year La Niña events
Abstract Long-lasting La Niña events (including double-year and triple-year La Niña events) have become more frequent in recent years. How the multi-year La Niña events affect tropical cyclone (TC) activities in the western North Pacific (WNP) and whether they differ from single-year La Niña events...
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ftdoajarticles:oai:doaj.org/article:dda3901718194b9b81d4cde1f721a6b2 2024-09-15T18:23:05+00:00 China coasts facing more tropical cyclone risks during the second decaying summer of double-year La Niña events Xi Luo Lei Yang Johnny C. L. Chan Sheng Chen Qihua Peng Dongxiao Wang 2024-08-01T00:00:00Z https://doi.org/10.1038/s41612-024-00729-8 https://doaj.org/article/dda3901718194b9b81d4cde1f721a6b2 EN eng Nature Portfolio https://doi.org/10.1038/s41612-024-00729-8 https://doaj.org/toc/2397-3722 doi:10.1038/s41612-024-00729-8 2397-3722 https://doaj.org/article/dda3901718194b9b81d4cde1f721a6b2 npj Climate and Atmospheric Science, Vol 7, Iss 1, Pp 1-10 (2024) Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2024 ftdoajarticles https://doi.org/10.1038/s41612-024-00729-8 2024-09-02T15:34:35Z Abstract Long-lasting La Niña events (including double-year and triple-year La Niña events) have become more frequent in recent years. How the multi-year La Niña events affect tropical cyclone (TC) activities in the western North Pacific (WNP) and whether they differ from single-year La Niña events are unknown. Here we show that TCs are more active over the far-WNP (FWNP, 110°–150°E), leading to marked high risks at China coasts during the second decaying summer of double-year La Niña events. The anomalous TC activities are directly related to the enhanced cyclonic anomaly over the FWNP, possibly a result of large-scale remote forcing initiated by the tropical North Atlantic (TNA) cooling. The persistent TNA cooling from the decaying winter to summer of double-year La Niña events drives westerlies over the Indo-western Pacific through Kelvin waves, which induce the cooling over the north Indian Ocean via the wind-evaporation-sea surface temperature effect, favoring the asymmetric heat distribution pattern and stimulating an anomalous vertical circulation over the eastern Indian Ocean to FWNP. The cooling over the north Indian Ocean also excites Gill responses, magnifying the TNA-induced westerlies and boosting the anomalous vertical circulation, and thus gives rise to the strong cyclonic circulation anomaly over the FWNP in summer. We suggest that the key point of the process is the strong TNA cooling related to the persistent negative Pacific-North American pattern (PNA) and positive North Atlantic Oscillation (NAO) while double-year La Niña events decay, distinct from the rapid decline of PNA and NAO during single-year La Niña events. The work provides a unique perspective on understanding TC activities over the WNP related to the El Niño-Southern Oscillation. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles npj Climate and Atmospheric Science 7 1 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
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Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Xi Luo Lei Yang Johnny C. L. Chan Sheng Chen Qihua Peng Dongxiao Wang China coasts facing more tropical cyclone risks during the second decaying summer of double-year La Niña events |
topic_facet |
Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Abstract Long-lasting La Niña events (including double-year and triple-year La Niña events) have become more frequent in recent years. How the multi-year La Niña events affect tropical cyclone (TC) activities in the western North Pacific (WNP) and whether they differ from single-year La Niña events are unknown. Here we show that TCs are more active over the far-WNP (FWNP, 110°–150°E), leading to marked high risks at China coasts during the second decaying summer of double-year La Niña events. The anomalous TC activities are directly related to the enhanced cyclonic anomaly over the FWNP, possibly a result of large-scale remote forcing initiated by the tropical North Atlantic (TNA) cooling. The persistent TNA cooling from the decaying winter to summer of double-year La Niña events drives westerlies over the Indo-western Pacific through Kelvin waves, which induce the cooling over the north Indian Ocean via the wind-evaporation-sea surface temperature effect, favoring the asymmetric heat distribution pattern and stimulating an anomalous vertical circulation over the eastern Indian Ocean to FWNP. The cooling over the north Indian Ocean also excites Gill responses, magnifying the TNA-induced westerlies and boosting the anomalous vertical circulation, and thus gives rise to the strong cyclonic circulation anomaly over the FWNP in summer. We suggest that the key point of the process is the strong TNA cooling related to the persistent negative Pacific-North American pattern (PNA) and positive North Atlantic Oscillation (NAO) while double-year La Niña events decay, distinct from the rapid decline of PNA and NAO during single-year La Niña events. The work provides a unique perspective on understanding TC activities over the WNP related to the El Niño-Southern Oscillation. |
format |
Article in Journal/Newspaper |
author |
Xi Luo Lei Yang Johnny C. L. Chan Sheng Chen Qihua Peng Dongxiao Wang |
author_facet |
Xi Luo Lei Yang Johnny C. L. Chan Sheng Chen Qihua Peng Dongxiao Wang |
author_sort |
Xi Luo |
title |
China coasts facing more tropical cyclone risks during the second decaying summer of double-year La Niña events |
title_short |
China coasts facing more tropical cyclone risks during the second decaying summer of double-year La Niña events |
title_full |
China coasts facing more tropical cyclone risks during the second decaying summer of double-year La Niña events |
title_fullStr |
China coasts facing more tropical cyclone risks during the second decaying summer of double-year La Niña events |
title_full_unstemmed |
China coasts facing more tropical cyclone risks during the second decaying summer of double-year La Niña events |
title_sort |
china coasts facing more tropical cyclone risks during the second decaying summer of double-year la niña events |
publisher |
Nature Portfolio |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41612-024-00729-8 https://doaj.org/article/dda3901718194b9b81d4cde1f721a6b2 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
npj Climate and Atmospheric Science, Vol 7, Iss 1, Pp 1-10 (2024) |
op_relation |
https://doi.org/10.1038/s41612-024-00729-8 https://doaj.org/toc/2397-3722 doi:10.1038/s41612-024-00729-8 2397-3722 https://doaj.org/article/dda3901718194b9b81d4cde1f721a6b2 |
op_doi |
https://doi.org/10.1038/s41612-024-00729-8 |
container_title |
npj Climate and Atmospheric Science |
container_volume |
7 |
container_issue |
1 |
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1810463211797872640 |