Japan Geoscience Union Meeting 2014

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International Session (Oral)

Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-CG Complex & General

[A-CG06_28PM2] Satellite Earth Environment Observation

Mon. Apr 28, 2014 4:15 PM - 6:00 PM 315 (3F)

Convener:*Riko Oki(Japan Aerospace Exploration Agency), Yoshiaki Honda(Chiba University, Center for Environmental), Kenlo Nishida Nasahara(Institute of Agricultural and Forest Engineering, University of Tsukuba), Takashi Nakajima(Tokai University Department of Network and Computer Engineering, School of Information and Design Engineering), Taikan Oki(Institute of Industrial Science, The University of Tokyo), Yokota Tatsuya(Center for Global Environmental Research, National Institute for Environmental Studies), Yukari N. Takayabu(Atmosphere and Ocean Research Institute(AORI), The University of Tokyo), Hiroshi Murakami(Earth Observation Research Center, Japan Aerospace Exploration Agency), Hajime Okamoto(Research Institute for Applied Mechanics,Kyushu University), Chair:Tatsuya Yokota(National Institute for Environmental Studies), Riko Oki(Japan Aerospace Exploration Agency)

5:45 PM - 6:00 PM

[ACG06-06] Development of a 3D solar induced chlorophyll fluorescence simulator for satellite fluorescence observation

*Hideki KOBAYASHI1, Shin NAGAI1, Tomoharu INOUE1, Kazuhito ICHII1 (1.Japan Agency for Marine-Earth Science and Technology)

Keywords:GOSAT, plant canopy radiative transfer model, chlorophyll fluorescence, GPP

Recent studies show that the vegetation canopy scale chlorophyll fluorescence can be observed from satellite, such as GOSAT and OCO-2, using Fraunhofer lines (e.g. Frankenberg et al., 2011). Satellite-based fluorescence can be used to infer the photosynthetic capacity of plant canopy. To understand how the canopy scale bidirectional fluorescence observations are related to three-dimensional fluorescence distribution within a plant canopy, it is necessary to evaluate canopy scale fluorescence emission using a detail plant canopy radiative transfer model. In this study, we developed a three-dimensional plant canopy radiative transfer model that can simulate the bidirectional chlorophyll fluorescence radiance. This modeling was based on the 3D radiative transfer model, forest light environmental simulator (FLiES) (Kobayashi and Iwabuchi, 2008). FLiES is a Monte Carlo ray-tracing model to simulate radiative field in shortwave (solar domain) and long-wave (thermal infrared) radiation in 3D landscape. To realize individual tree crown shapes, the original FLiES model used geometric objects such as cone, cylinder, and spheroid. Recently, FLiES has been extending to utilize voxel-based tree crown datasets, which are favorable to LiDAR based tree crown data sets. In this presentation, we show the current status of the development of the 3D chlorophyll fluorescence simulator.