Tsushima [Japan] Current Mode Water (TCMW)
2004
Isoda, Y. (Hokkaido Univ., Sapporo (Japan))
The Tsushima Current Mode Water (TCMW) can be defined as a water mass characterized by a thermostad ranging from 4 to 10 deg C and lying between the seasonal and main thermoclines in the Japan Sea. Seasonal and interannual variations of TCMW are described based on the published hydrographic thermal maps. In cooling season, a thick mixed layer of TCMW covers a wide area in the southern part of the Japan Sea, i.e., from the polar front along 40 deg N to the south. During heating season, this TCMW is mainly contained in a core water of warm eddies in the Tsushima Current region. The drastic structural changes of these eddies are brought in the following wintertime due to the strong vertical convection. Thus, TCMW seems to lose its original properties every winter. Thermal maps during recent eight years (1983-1990) suggested the large interannual variations of the TCMW formation rate and its properties.
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