Observational evidence of the Kuroshio meander and its propagation in the East China Sea
Entering the East China Sea (ECS) through the east of Taiwan, the Kuroshio flows northeastward, with its pathway confined along the continental slope of the Okinawa Trough. Four 75 kHz Acoustic Doppler Current Profilers (ADCPs) were deployed over a 3-year period (June 2020–June 2023), with two place...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2024.1512572/full |
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| author | SeungYong Lee Hanna Na Hanna Na Hong Sik Min Dong Guk Kim Hirohiko Nakamura Ayako Nishina |
| author_facet | SeungYong Lee Hanna Na Hanna Na Hong Sik Min Dong Guk Kim Hirohiko Nakamura Ayako Nishina |
| author_sort | SeungYong Lee |
| collection | DOAJ |
| description | Entering the East China Sea (ECS) through the east of Taiwan, the Kuroshio flows northeastward, with its pathway confined along the continental slope of the Okinawa Trough. Four 75 kHz Acoustic Doppler Current Profilers (ADCPs) were deployed over a 3-year period (June 2020–June 2023), with two placed across the typical path of the Kuroshio in each of the two latitudinal bands, to examine the relationship of current variability between upstream and downstream in the ECS. The along-path and cross-path velocities from the four ADCPs show dominant intraseasonal variability with a period of 8–32 days. Within this frequency band, current velocities exhibit a strong relationship when the upstream precedes the downstream by 6 days. The amplitude of this lagged co-variability tends to be larger from May to August, with an increase in along-path speed variability of up to about 24% at approximately 250 m depth for the onshore sites and an increase in cross-path speed variability of up to about 22% within the 200–300 m layer for the offshore sites. The intraseasonal variability of the sea level anomaly associated with this observed co-variability displays the Kuroshio meanders along its path, propagating northeastward at a speed of about 14.8 km/day. These results provide observational evidence of the Kuroshio meander and its propagation in the ECS, characterized by subsurface intensification during the warm season. |
| format | Article |
| id | doaj-art-2e5950272297488794c1f93b8ba4182b |
| institution | Kabale University |
| issn | 2296-7745 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Marine Science |
| spelling | doaj-art-2e5950272297488794c1f93b8ba4182b2025-01-31T05:10:23ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452025-01-011110.3389/fmars.2024.15125721512572Observational evidence of the Kuroshio meander and its propagation in the East China SeaSeungYong Lee0Hanna Na1Hanna Na2Hong Sik Min3Dong Guk Kim4Hirohiko Nakamura5Ayako Nishina6School of Earth and Environmental Sciences, Seoul National University, Seoul, Republic of KoreaSchool of Earth and Environmental Sciences, Seoul National University, Seoul, Republic of KoreaResearch Institute of Oceanography, Seoul National University, Seoul, Republic of KoreaKorea Institute of Ocean Science and Technology, Busan, Republic of KoreaKorea Institute of Ocean Science and Technology, Busan, Republic of KoreaFaculty of Fisheries, Kagoshima University, Kagoshima, JapanFaculty of Fisheries, Kagoshima University, Kagoshima, JapanEntering the East China Sea (ECS) through the east of Taiwan, the Kuroshio flows northeastward, with its pathway confined along the continental slope of the Okinawa Trough. Four 75 kHz Acoustic Doppler Current Profilers (ADCPs) were deployed over a 3-year period (June 2020–June 2023), with two placed across the typical path of the Kuroshio in each of the two latitudinal bands, to examine the relationship of current variability between upstream and downstream in the ECS. The along-path and cross-path velocities from the four ADCPs show dominant intraseasonal variability with a period of 8–32 days. Within this frequency band, current velocities exhibit a strong relationship when the upstream precedes the downstream by 6 days. The amplitude of this lagged co-variability tends to be larger from May to August, with an increase in along-path speed variability of up to about 24% at approximately 250 m depth for the onshore sites and an increase in cross-path speed variability of up to about 22% within the 200–300 m layer for the offshore sites. The intraseasonal variability of the sea level anomaly associated with this observed co-variability displays the Kuroshio meanders along its path, propagating northeastward at a speed of about 14.8 km/day. These results provide observational evidence of the Kuroshio meander and its propagation in the ECS, characterized by subsurface intensification during the warm season.https://www.frontiersin.org/articles/10.3389/fmars.2024.1512572/fullKuroshioEast China Seaacoustic doppler current profilersmeanderpropagationsubsurface-variability |
| spellingShingle | SeungYong Lee Hanna Na Hanna Na Hong Sik Min Dong Guk Kim Hirohiko Nakamura Ayako Nishina Observational evidence of the Kuroshio meander and its propagation in the East China Sea Frontiers in Marine Science Kuroshio East China Sea acoustic doppler current profilers meander propagation subsurface-variability |
| title | Observational evidence of the Kuroshio meander and its propagation in the East China Sea |
| title_full | Observational evidence of the Kuroshio meander and its propagation in the East China Sea |
| title_fullStr | Observational evidence of the Kuroshio meander and its propagation in the East China Sea |
| title_full_unstemmed | Observational evidence of the Kuroshio meander and its propagation in the East China Sea |
| title_short | Observational evidence of the Kuroshio meander and its propagation in the East China Sea |
| title_sort | observational evidence of the kuroshio meander and its propagation in the east china sea |
| topic | Kuroshio East China Sea acoustic doppler current profilers meander propagation subsurface-variability |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2024.1512572/full |
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