Impact of Tropical Cyclones on Geostrophic Velocity of the Western Boundary Current
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Title
- Impact of Tropical Cyclones on Geostrophic Velocity of the Western Boundary Current
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Author(s)
- Park, Jae Hyoung; Pak, Gyun Do; Kim, Eun Jin; Kang, Sok Kuh
- KIOST Author(s)
- Pak, Gyundo(박균도); Kim, Eun Jin(김은진)
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Alternative Author(s)
- 박재형; 박균도; 김은진; 강석구
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Publication Year
- 2021-09-28
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Abstract
- Tropical cyclones (TC), which are among the most destructive natural phenomena on Earth, have significant impacts on the western boundary current (WBC). We quantify the direct impact of TCs on the surface geostrophic velocity of the Kuroshio, the WBC in the western North Pacific, by analyzing satellite-derived geostrophic current data and using results from theoretical and numerical models. The study reveals that TCs decrease the surface geostrophic velocity by 14 cm s−1 which is 16% of the mean velocity of the Kuroshio (85 cm s−1), with the reduced velocity maintained for a month. The decrease in velocity of the Kuroshio is mainly (87%) due to the effect of TC-driven upwelling (“Cooling effect”), the effect of ocean heat uptake after the TC (“Warming effect”) being minor (13%); these are basically enabled by the strong thermal gradient around the Kuroshio. © 2021. The Authors.
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ISSN
- 0094-8276
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/42150
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DOI
- 10.1029/2021GL094355
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Bibliographic Citation
- Geophysical Research Letters, v.48, no.18, 2021
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Publisher
- John Wiley and Sons Inc
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Keywords
- geostrophic velocity; Kuroshio; ocean heat uptake; TC-driven upwelling; tropical cyclone; western boundary current
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Type
- Article
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Language
- English
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Document Type
- Article
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