Variations of Kuroshio geostrophic transport south of Japan estimated from long-term IES observations

Autor: Hiroshi Ichikawa, Koji Kakinoki, Mark Wimbush, Shin Ichiro Umatani, Kaoru Ichikawa, Shiro Imawaki, Hiroshi Uchida, Ayako Nishina, Hirohiko Nakamura
Rok vydání: 2008
Předmět:
Zdroj: Journal of Oceanography. 64:373-384
ISSN: 1573-868X
0916-8370
Popis: Two inverted echo sounders were maintained on coastal and offshore sides of the Kuroshio south of Japan from October 1993 to July 2004. Applying the gravest empirical mode method, we obtained a time series of geostrophic transport. Estimated transports generally agree well with geostrophic transports estimated from hydrography. Their agreement with the hydrographic transports is better than that of transports estimated from satellite altimetry data. The geostrophic transport is expressed as the surface transport per unit depth multiplied by the equivalent depth. The geostrophic transport varies mostly with the surface transport and fractionally with the equivalent depth. Seasonal variation of the geostrophic transport has a minimum in March and a maximum in September, with a range of about one fifth of the total transport.
Databáze: OpenAIRE
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