Definition of Waters

Oyashio waters (subarctic), the Oyashio-Kuroshio transition, and Kuroshio waters (subtropic) were distinguished according to Kawai's (1972) definition, using the temperature at a depth of 100 or 200 m. This study uses the term "Oyashio-transition waters'' to describe the area including Oyashio waters and the Kuroshio-Oyashio transition. A fixed station (lat 33°12'54''N, long 133°23'36"E) in Tosa Bay with a bottom depth of 100 m was located inshore northwest of Kuroshio waters. The East China Sea (ECS, subtropic) was divided into two regions (continental shelf waters and Kuroshio waters) using a definition based on the temperature at a depth of 200 m (Kawai, 1972). The term "Kuroshio waters'' as used in this study includes the Kuroshio waters, the ECS, and Pacific inshore areas. ECS continental shelf waters are a typical Case II, a group of water with higher chlorophyll a and

Figure 1: Measuring sites for primary production using a 13C spiked incubation for 24 hours in Japan and Okhotsk Seas, Oyashio-transition waters, Kuroshio waters, Tosa Bay, and continental shelf waters in the East China Sea overlaid on an annual mean of chlorophyll a in 2002 derived from SeaWiFS (http://www.seawifs.gsfc.nasa.gov/cgi/level3.pl/) (For colour version, see Colour Plate Section).

Figure 1: Measuring sites for primary production using a 13C spiked incubation for 24 hours in Japan and Okhotsk Seas, Oyashio-transition waters, Kuroshio waters, Tosa Bay, and continental shelf waters in the East China Sea overlaid on an annual mean of chlorophyll a in 2002 derived from SeaWiFS (http://www.seawifs.gsfc.nasa.gov/cgi/level3.pl/) (For colour version, see Colour Plate Section).

suspended matters(Morel and Prieur, 1977) under the influence of Chinese Coastal waters and the effluent from the Changjiang River. The dataset consists of 48 measurements in Oyashio-transition waters, 46 in Kuroshio waters, 18 in Tosa Bay, 58 in ECS continental shelf waters, and 6 in the Japan and Okhotsk Seas (Table 1).

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