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【Press release】Detecting Anthropogenic CO2 Emissions from Mega-City Regions from Space by “IBUKI” (GOSAT)

The Greenhouse gases Observing SATellite (GOSAT) “IBUKI”, developed jointly by the Ministry of the Environment (MOE), the National Institute for Environmental Studies (NIES), and the Japan Aerospace Exploration Agency (JAXA) is the world’s first satellite designed specifically to monitor greenhouse gases from space. The satellite has continued to fulfill its main mission to monitor atmospheric carbon dioxide (CO2) and methane (CH4) concentrations from space since its launch in January 2009. Anthropogenic CO2 concentrations in mega-cities including the metropolitan area in Tokyo were analyzed for the five and half years from June 2009 to December 2014, based on the observational data acquired by “IBUKI”. It was found that the anthropogenic CO2 concentrations estimated from "IBUKI" data generally agree with those estimated using data on fossil fuel emissions (inventory) in Japan. These results indicate that satellite observations from space can become useful to monitor and verify CO2 emission rates that were aggregated and published by all nations of the world based on the framework of “The Paris Agreement”. With the progress in satellite data collection and further improvement in data analysis methods, these observational data by “IBUKI” and its successor (GOSAT-2) accumulated over multiple years will be compared with emission inventories.

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