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タイトル: Divergence/convergence field observed with GPS tracked drifters in the Upper Gulf of Thailand
著者: Michida, Yutaka
Takimoto, Ryota
Sojisporn, Pramot
Yanagi, Tetsuo
キーワード: divergence
convergence
surface drifters
Gulf of Thailand
GPS
primary production
発行日: 2006年4月28日
出版者: International Coastal Research Center, Ocean Research Institute, the University of Tokyo
掲載誌情報: Coastal marine science. Vol.30No.1, 2006.4, pp. 27-35
抄録: The relationship between the divergence/convergence field and chlorophyll a concentration in the surface layer of the Upper Gulf of Thailand is investigated by field observations of hydrographic parameters including temperature, salinity, nutrients, chlorophyll, and other properties, and experiments using GPS tracked drifters. The field observations were carried out on board a research vessel Kasetsart I and a fishing boat in May and October 2004, and February 2005. It is found that there is a clear correlation in a qualitative sense between divergence field and chlorophyll a, in which relatively higher chlorophyll a is observed in a divergent condition, with an exception at one station where the opposite relation is indicated possibly because of some local effects of a nearby island upon the surface currents. Such a clear correlation, however, can not be explained by a hypothetical scenario that surface divergence sustains a high chlorophyll a by supplying water of high nutrients from the lower layer, having been considered the distribution of nutrients and other hydrographic structures.
URI: http://hdl.handle.net/2261/5604
ISSN: 13493000
出現カテゴリ:Coastal Marine Science
Coastal Marine Science

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