HR: 0800h
AN: OS31A-1438    [Abstracts]
TI: Estimation Of Photic Zone Integrated Primary Production Using Satellite Chlorophyll a, Sea Surface Temperature And Light
AU: * Vedula, V
EM: sarma@hyarc.nagoya-u.ac.jp
AF: Japan Science and Technology Agency, HyARC, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 4648601 Japan
AU: Sasaoka, K
EM: sasaoka@jamstec.go.jp
AF: Frontier Research System for Global Change, 3173-25Showamachi, Kanazawa-ku, Yokohama, 2360001 Japan
AU: Saino, T
EM: tsaino@hyarc.nagoya-u.ac.jp
AF: Hydrospheric Atmospheric Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 4648601 Japan
AB: Estimation of real-time basin-scale images of primary production is required to understand changes in natural removal mechanism of atmospheric CO2 by the ocean. Approximately half of the plant production occurs in the oceans, therefore, it has significant role on carbon cycling on the earth surface. The measured photic zone integrated primary production by 14C tracer technique showed significant positive relation with surface chlorophyll a and negative relation with sea surface temperature (SST) during all seasons in the World Oceans. The slope of the relation between surface chlorophyll a and photic zone production is not significantly different in the equatorial and temperate regions in the World Oceans. Relatively these slopes are different in the subtropical and subpolar regions where photosynthetically active radiation (PAR) showed strong relation with photic zone production. Based on these relationships, multiple regression equations were developed for the construction of photic zone integrated production using monthly mean PAR, surface chlorophyll a from Sea-viewing Wide Field of view Sensor and SST from Advanced Very High Resolution Radiometer. We present here spatial and seasonal variations in global primary production and comparison with existing models.
DE: 4800 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL (0460)
DE: 4805 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4912)
DE: 4806 Carbon cycling (0428)
DE: 4845 Nutrients and nutrient cycling (0470, 1050)
DE: 4855 Phytoplankton
SC: Ocean Sciences [OS]
MN: Fall Meeting 2005