Long-lasting upper ocean temperature responses induced by intense typhoons in mid-latitude SCIE SCOPUS

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Title
Long-lasting upper ocean temperature responses induced by intense typhoons in mid-latitude
Author(s)
Son, Jun Hyeok; Heo, Ki Young; Choi, Jung Woon; Kwon, Jae Il
KIOST Author(s)
Son, Jun Hyeok(손준혁)Heo, Ki Young(허기영)Choi, Jung Woon(최정운)Kwon, Jae Il(권재일)
Alternative Author(s)
손준혁; 허기영; 최정운; 권재일
Publication Year
2022-04
Abstract
The sea surface temperature (SST) drops rapidly when a typhoon passes over the western North Pacific, and the cold SST is known as cold wake. In general, more intense typhoons on the day of arrival cause stronger SST cooling via turbulent oceanic vertical mixing. Moreover, after intense typhoons have passed, there are cases in which the SST decreases further, and the cold conditions persist for approximately 2 weeks. In this study, we suggest possible mechanisms by which long-lasting cold SST responses to typhoon forcing are related to the generation of cold-core-like ocean circulation. The atmospheric surface cyclonic circulation causes divergent anticlockwise upper ocean currents owing to the Ekman transport, which in turn induces further upwelling and strengthens the cold SST. In the European Center for Medium-Range Weather Forecasts Ocean Reanalysis System 5, cold-core-like ocean current responses were strong in 5 typhoons among the 12 intense typhoons that passed through 30°N in the western North Pacific region from 2001 to 2019. The favorable conditions for a cold-core circulation to occur can be summarized as a slow typhoon migration speed with strong intensity, well stratification of vertical ocean layers, and the absence of large-scale strong background currents.
ISSN
2045-2322
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/42424
DOI
10.1038/s41598-022-09833-2
Bibliographic Citation
Scientific Reports, v.12, no.1, pp.5752, 2022
Publisher
Nature Publishing Group
Type
Article
Language
English
Document Type
Article
Publisher
Nature Publishing Group
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