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[D-3.2 Study of Biological Processes and Material Flux around Continental Shelf with Satellite Ocean Color Data and Physical-Biological Model]

[Contact Person]

Joji Ishizaka
National Institute for Resources and Environment
16-3 Onogawa, Tsukuba, Ibaraki, 305 Japan
Tel. +81-298-58-8379, Fax +81-298-58-8357
E-mail ishizaka@nire.go.jp

[Total Budget for FY1990-1992]

34,617,000 Yen

[Abstract]

　Coastal Zone Color Scanner data around Japan was searched and data catalog was assembled. Ship-observed phytoplankton data was also searched and it was found that there were very few ship data which can be used to verify the ocean color data. Comparison between CZCS and ship-data taken around Izu local upwelling area on May 23, 1982, was conducted. The comparison showed that CZCS data underestimate the surface phytoplankton pigment with a factor of l/5 when typical atmospheric correction algorithm was used. New atmospheric correction algorithm which is suitable for aerosol around Japan is required. However, oceanographic features detected by the CZCS data clearly showed the usefulness of the ocean color data for monitoring environmental changes and for understanding ecosystem of coastal and open ocean area. Vertically one-dimensional ecosystem models were developed and compared with the ship data taken at the Izu local upwelling area. Primary production is reasonably predicted by the model when the environmental parameters during the incubation for primary production was well known. Predicting phytoplankton biomass is much difficult for local upwelling; however it is useful to predict for much large scale changes. Satellite data assimilation for ecosystem model is useful but further study is required.

[Key Words]

Ocean Color Remote Sensing, Physical-Biological Model, Flux, Phytoplankton, Data Analysis System