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[D-3.3 Study on the Ocean Environment Index Based on Satellite Ocean Color Data]

[Contact Person]

Akira Harashima
Head, Ocean Research Team
Global Environment Division,
National Institute for Environmental Studies,
Environment Agency
Tel:+81-298-51-6111(Ext.322), Fax:+81-298-51-4732
E-mail:harashim@nies.go.jp

[Total Budget for FY1990-1992]

25,995,000 Yen

[Abstract]

　An automated biogeochemical monitoring were conceptually designed using Japan-Korea ferry boat for supplementing the satellite data and for constructing seasonal and long-term time series of phytoplankton biomass and related dissolved nutrients with revealing their spatial changes. In Tsushima Strait (the continental shelf sea), a phytoplankton blooming occurred in spring, which terminated in early summer presumably because of N-limiting. In the Seto Inland Sea, blooming persisted from early spring to early summer. In the termination phase of blooming, dinoflagellates occupied 20% of the phytoplankton biomass in the eastern Inland Sea and the cyanophyceae smaller than 2 micron was dominant in Tsushima Strait, where the N03-N was the limiting factor for the phytoplankton growth. The ferry monitoring was found to be quite feasible for the above purposes.

[Key Words]

Phytoplankton Blooming, Japan-Korea Ferry Boat, Satellite Ocean color data, Biogeochemical Monitoring, Ship Intake Sensing