Response of Spatial and Temporal Variations in the Kuroshio Current to Water Column Structure in the Western Part of the East Sea

Using geographic sea surface current data, long-term changes in spatial and temporal variations in the Kuroshio Current 1993–2021 were analyzed, and the relationship between the Kuroshio Current and oceanic conditions, such as water column structure and intensity of East Korea Warm Current (EKWC) in...

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Bibliographic Details
Published in:Journal of marine science and engineering 2022-11, Vol.10 (11), p.1703
Main Authors: Lee, Chung-Il, Jung, Yong-Woo, Jung, Hae-Kun
Format: Article
Language:English
Subjects:
Chlorophyll
Chlorophyll a
Columnar structure
Current data
East Korea Warm Current
Kuroshio Current
Long-term changes
Pacific decadal oscillation
Saline water
Salinity
Sea surface
Temporal variations
Vertical distribution
Water circulation
Water column
Water masses
Water temperature
western part of the East Sea
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Summary:Using geographic sea surface current data, long-term changes in spatial and temporal variations in the Kuroshio Current 1993–2021 were analyzed, and the relationship between the Kuroshio Current and oceanic conditions, such as water column structure and intensity of East Korea Warm Current (EKWC) in the western part of the East Sea (WES), was investigated. Long-term changes in the Kuroshio Current intensity were positively correlated with the Pacific Decadal Oscillation and East Asian Winter Monsoon indices. When the Kuroshio Current was strong, its main axis passing around the Ryukyu Islands moved eastward, and the intensity of EKWC separated from the Kuroshio Current and flowed into the WES, indicating weakened conditions. When the intensity of the EKWC was weakened, its main axis moved away from the inshore area of the WES. As a result, the vertical distribution range of the cold and low saline water mass located in the bottom layer extended to shallower depths in the inshore area of the WES with increasing chlorophyll-a.
ISSN:2077-1312
2077-1312
DOI:10.3390/jmse10111703