[A-CG35] Global Carbon Cycle Observation and Analysis

[ACG35-01] Urban Carbon Dioxide Emission Inventory Developed by Bottom-up Approach

*Richao Cong¹, Makoto Saito¹, Ryuichi Hirata¹, Akihiko Ito¹, Shamil Maksyutov¹, Tomohiro Oda^2,3 (1.Center for Global Environmental Research, National Institute for Environmental Studies, 2.Goddard Earth Science Technology and Research, Universities Space Research Association, 3.Global Modeling and Assimilation Office, NASA Goddard Space Flight Center)

Keywords:Urban emissions inventory , CO2 of Tokyo, Bottom up approach, Anthropogenic emissions

In this study, we developed a bottom-up approach to compile a fine-grained CO₂ emissions inventory of Tokyo, Japan for 2014 complying with IPCC 2006 Guidelines. The emissions map was made by linking the available and reliable statistics data with spatial data. In addition, the method could be applied in other cities of Japan. The CO₂ emissions from 8 proxy sources (residential, commercial & industrial, agricultural energy use, road traffic, aviation, navigation, power plants, and waste disposal sites) were counted. The emissions from point, line and area sources were estimated respectively by Geographic Information System (GIS) technology and described on the map of Tokyo. As our estimation, the total CO₂ emissions of Tokyo in 2014 are about 48,425 Gg CO₂ yr^-1. Then to do the validation, we extracted the emissions from two existing national CO₂ inventories with the same boundary: East Asian Air Pollutant Emission Grid Database (EAGrid 2010) and Open-Data Inventory for Anthropogenic CO₂ emission (ODIAC 2014) to compare the emission differences with our estimation. And our result showed good performance that was larger than EAGrid 2010`s result of 41,491 Gg CO<sub>2</sub> yr<sup>-1</sup> and smaller than ODIAC`s result of 56,417 Gg CO₂ yr^-1.