期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 8
页码：26-29
出版社：Copernicus Publications
摘要：The "Global Change Observation Mission-Climate" (GCOM-C) is a project of Japan Aerospace Exploration Agency (JAXA) for the global and long-term observation of the Earth environment. The GCOM-C is expected to play an important role in monitoring and understanding global climate change. It will be a kind of health checkup of the Earth from space. The GCOM-C also aims to construct, use, and verify systems that enable continuous global-scale observations of various geophysical parameters. The GCOM- C is a part of the JAXA's GCOM mission which consists of two satellite series, GCOM-C and GCOM-W (Water), spanning three generations in order to perform uniform and stable global observations for 13 years. Whereas GCOM-W carries a multi-frequency, dual-polarized, passive microwave radiometer named Advanced Microwave Scanning Radiometer 2 (AMSR2) to observe water- related targets such as precipitation, water vapor, sea surface wind speed, sea surface temperature, soil moisture, and snow depth, GCOM-C carries a multi-spectral optical radiometer named Second Generation Global Imager (SGLI), which will have special features of wide spectral coverage from 380nm to 12 m, a high spatial resolution of 250m, a field of view exceeding 1000km, two- direction simultaneous observation, and polarization observation. The GCOM-C mission aims to contribute to improving our knowledge and prediction of the global carbon cycle and radiation budget through high-accuracy observation of global vegetation, ocean color, temperature, cloud, aerosol, and snow and ice through the SGLI observations. The GCOM will take over the Advanced Earth Observing Satellite-II (ADEOS-II) mission and transition into long-term monitoring of the Earth. One of the important targets to be observed by GCOM-C is snow and sea ice in the cryosphere. SGLI on GCOM-C1 will retrieve not only snow cover extent but also snow physical parameters such as snow grain size, temperature, and mass fraction of impurity mixed in snow layer. The snow physical parameters are important factors that determine spectral albedo of the snow surface. Thus it is essential to monitor those parameters from space in order to better understand snow metamorphosis and melting process and also to study the response of snow and sea-ice cover extent in the Polar Regions to a climate forcing such as global warming. A final goal of these observations is to improve land-surface processes in numerical climate models by accumulating knowledge on the evolution of snow and sea ice in the cryosphere
