JpGU-AGU Joint Meeting 2017

Presentation information

[JJ] Poster

A (Atmospheric and Hydrospheric Sciences) » A-OS Ocean Sciences & Ocean Environment

[A-OS28] [JJ] Biological Oceanography

Sat. May 20, 2017 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall HALL7)

convener:Hiroaki Saito(Atmosphere and Ocean Research Institute, the University of Tokyo), Hiroya Sugisaki(Japan Fisheries Research and Education Agency)

[AOS28-P03] Phytoplankton group-specific size structure and primary production in the Kuroshio waters by satellite observation

*Takafumi Hirata1, Koji Suzuki1 (1.Faculty of Environmental Earth Science, Hokkaido University)

Keywords:Kuroshio, Phytoplankton, Primary Production, Satellite, size

Phytoplankton group-specific chlorophyll abundance, quantum yield of photosynthesis, primary production and cell size were analyzed using earth observation satellite data. Monthly climatology over 1998-2007 of these variables suggested that haptophytes were relatively abundant than diatoms and cyanobacteria in Kuroshio and surrounding waters. According to our analysis, primary production of diatoms in the waters were more regulated by its abundance than its quantum yield of photosynthesis whereas the production of cyanobacteria varied with its quantum yield than its abundance. The production of haptophytes was influenced by the both factors, showing a seasonal dependence. When the group-specific cell size was compared with the group-specific production, the largest primary production of diatoms tended to occur at its model cell size, whereas the largest production of haptophytes and cyanobacteria did not.