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Fluctuation of dissolved organic carbon in seawater of Sagami Bay during 1971–1972
Authors:Norio Ogura  Akiyoshi Kamatani  Nobutada Nakamoto  Masaki Funakoshi  Shizuo Iwata
Affiliation:1. Faculty of Agriculture, Tokyo University of Agriculture and Technology, Saiwai-Cho, Fuchu, 183, Tokyo, Japan
2. Tokyo University of Fisheries, Konan, Minato-ku, 108, Tokyo, Japan
3. Faculty of Science, Tokyo Metropolitan University, Fukazawa-cho, Setagayaku, 158, Tokyo, Japan
4. Kanagawa Prefecture Fisheries Experimental Station, Misaki, Miura-shi, 238-02, Kanagawa, Japan
Abstract:Fluctuation of dissolved organic carbon (DOC) was studied during 1971–1972 at monthly intervals in surface layers of Sagami Bay. Concentration of DOC varied from 0.8 to 1.7 mgC/l in surface water (0 m). Maximum concentration of 1.7 mgC/l was observed in July 1971 and after then DOC decreased gradually to a minimum of 0.8 mgC/l in May 1972. The fluctuation of DOC during the observation periods seems to have close relations with those of water temperature and salinity. High DOC concentration found in summer months may be associated with bloom of phytoplankton or intrusion of seawater from Tokyo Bay and/or inland water containing high DOC.
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