[A-CG36] Satellite Earth Environment Observation

[ACG36-06] Observing anthropogenic emissions of greenhouse gases and air pollutants with the GOSAT-GW satellite: Scientific targets and policy contributions

*Hiroshi Tanimoto¹, Tsuneo Matsunaga¹, Nobuko Saigusa¹, Takafumi Sugita¹, Hisashi Yashiro¹, Isamu Morino¹, Makoto Saito¹, Hirofumi Ohyama¹, Kohei Ikeda¹, Yu Someya¹, Tamaki Fujinawa¹, Yousuke Yamashita¹, Tazu Saeki¹, Yugo Kanaya², Takashi Sekiya², Yasuko Kasai³, Tomohiro Sato³ (1.National Institute for Environmental Studies, 2.Japan Agency for Marine-Earth Science and Technology, 3.National Institute of Information and Communications Technology)

Keywords:carbon dioxide, nitrogen oxides, climate change, air pollution, methane

Following the GOSAT satellite launched by Japan in 2009, several satellites observing greenhouse gases (GHGs) including carbon dioxide (CO₂) and methane (CH₄) were launched by the United States, Europe and China and are successfully in operation. There are several plans to launch additional GHG-observing satellites in near future. In Japan there is an ongoing plan to launch the third satellite in the GOSAT series. This mission is named “Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW)”, with an objective to observe CO₂, CH₄, and nitrogen dioxides (NO₂) with the Total Anthropogenic and Natural emissions mapping SpectrOmeter-3 (TANSO-3) sensor, providing the data at a horizontal resolution of 3 km or less. The missions of GOSAT-GW include (1) monitoring of whole atmosphere-mean concentrations of GHGs, (2) validation of nationwide anthropogenic emissions of GHGs, and (3) detection of GHGs emissions from large sources. We will brief an overview of its objectives and current status, with a focus on scientific targets and approaches, and implications for international climate change abatement strategies.