Japan Geoscience Union Meeting 2016

Presentation information

International Session (Oral)

Symbol A (Atmospheric and Hydrospheric Sciences) » A-CG Complex & General

[A-CG10] Earth and Planetary satellite observation projects Part II: Satellite Earth Environment Observation

Tue. May 24, 2016 9:00 AM - 10:30 AM 303 (3F)

Convener:*Riko Oki(Japan Aerospace Exploration Agency), Tadahiro Hayasaka(Graduate School of Science, Tohoku University), Kaoru Sato(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Masaki Satoh(Atmosphere and Ocean Research Institute, The University of Tokyo), Yoshiaki HONDA(Center for Environmental Remote Sensing, Chiba University), Kenlo Nasahara(Faculty of Life and Environmental Sciences, University of Tsukuba), Takashi Nakajima(Tokai University, School of Information Science & Technology, Dept. of Human & Information Science), Taikan Oki(Institute of Industrial Science, The University of Tokyo), Tsuneo Matsunaga(Center for Environmental Measurement and Analysis, National Institute for Environmental Studies), Yukari Takayabu(Atmosphere and Ocean Research Institute, the University of Tokyo), Hiroshi Murakami(Earth Observation Research Center, Japan Aerospace Exploration Agency), Hajime Okamoto(Kyusyu University), Gail Skofronick Jackson(NASA Goddard Space Flight Center), Paul Chang(NOAA College Park), David Crisp(Jet Propulsion Laboratory, California Institute of Technology), Chair:Yoshiaki Honda(Center for Environmental Remote Sensing, Chiba University), Hiroshi Murakami(Earth Observation Research Center, Japan Aerospace Exploration Agency)

10:15 AM - 10:30 AM

[ACG10-18] Development of new satellite ocean colour products: moving forward to an estimation of phytoplankton photo-physiology

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

Keywords:ocean color remote sensing, phytoplankton, photo-physiology

Since the launch of the Coastal Zone Color Scanner (CZCS) in the 1970s, ocean color remote sensors have been providing synoptic views of marine biological (and biogeochemical) activities via surface chlorophyll-a observation. The ocean colour algorithms, in addition to ocean colour sensors, also evolved since the CZCS, and the remote sensing data of various biogeochemical variables have become available (e.g. particulate organic carbon, calcite concentration, chromophoric dissolved organic matter etc.). While availability of the biogeochemical products from the ocean color remote sensing is continuously growing, it is only the fluorescence line height due to phytoplankton that became available as a biological product after chlorophyll-a. Here we challenge to develop a new satellite algorithm to retrieve more biological variables using the ocean colour remote sensing. We found in theory that some physiological quantities of various phytoplankton groups such as the chlorophyll-a specific-absorption coefficient and the quantum yield of photosynthesis can be retrieved by integrating a bio-optical theory and an image processing technique. When these biological products were actually derived using the satellite ocean colour data, our analyses revealed that primary productivity of some phytoplankton groups could be largely influenced by their physiology rather than their biomass. This implies the importance of physiological observation of phytoplankton for a better understanding of ocean biogeochemical processes and ecology.