Seasonal Variation of the Korea Strait Bottom Cold Water and Its Relation to the Bottom Current
NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
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Analysis of high resolution hydrographic and current data revealed that the Korea Strait Bottom Cold Water KSBCW flowed into the Korea Strait from May to January and contained two temperature minimums, one in AugustSeptember and another in DecemberJanuary. With the main current flows confined within 70 km of the Korean coast, maximum southwestward bottom currents corresponded with the temperature minimums. Time-series of bottom current and temperature near the Korean coast clearly showed that the bottom temperature decreased as the bottom current strengthened. Seasonal variation of the KSBCW was linked to the combined effects of the barotropic and baroclinic current variations in the Korea Strait. The annual minimum bottom temperature of the KSBCW was associated with the maximum southwestward baroclinic component. The KSBCW had a secondary maximum southwestward bottom current and secondary minimum temperature in DecemberJanuary when the Tsushima Warm Current TWC, flowing into the EastJapan Sea EJS, had the minimum volume transport.
- Physical and Dynamic Oceanography