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Proceedings Paper

Two-phytoplankton community model of primary production for ocean color satellite data
Author(s): Takahiko Kameda; Joji Ishizaka; Hiroshi Murakami
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Paper Abstract

We developed an algorithm to estimate primary production from ocean color satellite data, and estimated the global distribution of primary production with OCTS and SeaWiFS data. The VGPM is one of the simplest and most usable models for primary production estimation from satellite chlorophyll. We propose two-phytoplankton community model of primary production to improve the VGPM. In general, chlorophyll concentration tends to be proportional to phytoplankton cell size and phytoplankton productivity tends to be inversely proportional to cell size. Based on these facts, we improved PBopt(maximum carbon fixation rate within a water column), which is one of the most important parameters of the VGPM. We assume that the phytoplankton community is composed of large and small cell size phytoplankton and that there are limits to the biomass of small phytoplankton. Based on this hypothesis, we matched PBopt to the functions of sea surface temperature and sea surface chlorophyll concentration. The results indicate that small phytoplankton has higher productivity with higher temperature dependency. We estimated the global distribution of primary production using this modified VGPM. The global distribution of primary production is basically similar to that of chlorophyll concentration. The modified VGPM estimates lower productivity than original VGPM in high chlorophyll concentration areas, and conversely estimates higher productivity in low chlorophyll concentration areas. With total global primary production, the modified VGPM results are 12% lower than the original VGPM.

Paper Details

Date Published: 5 January 2001
PDF: 7 pages
Proc. SPIE 4154, Hyperspectral Remote Sensing of the Ocean, (5 January 2001); doi: 10.1117/12.411670
Show Author Affiliations
Takahiko Kameda, National Research Institute of Far Seas Fisheries (Japan)
Joji Ishizaka, Nagasaki Univ. (Japan)
Hiroshi Murakami, National Space Development Agency of Japan (Japan)


Published in SPIE Proceedings Vol. 4154:
Hyperspectral Remote Sensing of the Ocean
Robert J. Frouin; Hiroshi Kawamura; Motoaki Kishino, Editor(s)

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