Unraveling the Indian monsoon’s role in fueling the unprecedented 2022 Marine Heatwave in the Western North Pacific

Qianghua Song; Chunzai Wang; Yulong Yao; Hanjie Fan

doi:10.1038/s41612-024-00645-x

journal article Open Access Apr 16, 2024

Unraveling the Indian monsoon’s role in fueling the unprecedented 2022 Marine Heatwave in the Western North Pacific

Qianghua Song Chunzai Wang

Yulong Yao

Hanjie Fan

npj Climate and Atmospheric Science Vol. 7 No. 1 · Springer Science and Business Media LLC

View at Publisher Save 10.1038/s41612-024-00645-x

Abstract

AbstractAn unprecedented marine heatwave (MHW) event occurred in the middle-high latitudes of the western North Pacific during the summer of 2022. We demonstrate that excessive precipitation thousands of kilometers away fuels this extreme MHW event in July 2022. In the upper atmosphere, a persistent atmospheric blocking system, forming over the MHW region, reduces cloud cover and increases shortwave radiation at the ocean surface, leading to high sea surface temperatures. Atmospheric perturbations induced by latent heat release from the extreme precipitation in the Indian summer monsoon region enhance this atmospheric blocking through the propagation of quasi-stationary Rossby waves. Our hypothesis is verified by using a numerical model that is forced with the observed atmospheric anomalous diabatic heating. This study sheds light on how a subtropical extreme event can fuel another extreme event at middle-high latitudes through an atmospheric teleconnection.

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References

Details

Published: Apr 16, 2024
Vol/Issue: 7(1)
License: View

Authors

NOAA/Atlantic Oceanographic and Meteorological Laboratory, Miami, Florida

Y

Yulong Yao

College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, China

H

Hanjie Fan

Cite This Article

Qianghua Song, Chunzai Wang, Yulong Yao, et al. (2024). Unraveling the Indian monsoon’s role in fueling the unprecedented 2022 Marine Heatwave in the Western North Pacific. npj Climate and Atmospheric Science, 7(1). https://doi.org/10.1038/s41612-024-00645-x

Unraveling the Indian monsoon’s role in fueling the unprecedented 2022 Marine Heatwave in the Western North Pacific

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