Japan Geoscience Union Meeting 2016

Presentation information

International Session (Poster)

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

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

Mon. May 23, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

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)

5:15 PM - 6:30 PM

[ACG10-P07] Simultaneous observations of solar-induced chlorophyll fluorescence by vegetation and atmospheric CO2 dynamics by GOSAT

*Hibiki M Noda1, Kouki Hikosaka2, Kazutaka Murakami1, Tsuneo Matsunaga1 (1.NIES National Institute of Environmental Studies, 2.Tohoku University)

Keywords:carbon cycle of terrestrial ecosystem, photosynthetic production

In these decades, global warming has progressed owing to increase of greenhouse gases (GHGs) such as CO2. To deal effectively with this issue by mitigation and adaptation, it is necessary to monitor emission and sequestration of GHGs with their underlying mechanisms including biogeochemical processes and human activities. Terrestrial ecosystem, which is the large carbon sink, absorbs 123 Pg carbon per year through plant photosynthesis (IPCC 2014). Satellite remote sensing has been used to monitor the spatial and temporal dynamics of terrestrial ecosystems that are responsible for such photosynthetic CO2 absorption. Such observation provides us with geographical information on the potential distribution of carbon sequestration by the aid of ecosystem models. However, as the photosynthesis of a given vegetation is quite sensitive to meteorological changes such as radiation, temperature and precipitation, we need to observe the photosynthetic ‘activity’ in a physiological sense, together with the atmospheric CO2 concentration over continental and global scales. Joiner et al. (2011) and Frankenberg et al. (2011) have suggested that TANSO FTS on Greenhouse Gases Observing Satellite (GOSAT) could detect overlapping part of solar-induced chlorophyll fluorescence (SIF) emitted by terrestrial vegetation and Fraunhofer line. The chlorophyll fluorescence is photons of red and far-red light that emitted by chlorophylls, and in plant ecophysiology it has been a biophysical index to examine the photosynthetic responses to environmental stresses such as extreme temperatures and drought. Thus SIF remote sensing is drawn considerable attention as a new technique to observe the photosynthetic activity of the vegetation. This paper will present our on-going and future challenges by GOSAT and GOSAT-2 to observe such photosynthetic activity of terrestrial ecosystems and its possible consequences with the atmospheric CO2 concentration from national, continental to global scales under climate change.