[A-AS01] Global Carbon Cycle Observation and Analysis

[AAS01-P11] Synthesis of top-down and bottom-up estimations of terrestrial CO₂ budget in Asia

*Kazuhito Ichii^1,2, Masayuki Kondo¹, Prabir Patra¹, Tazu Saeki¹, Takashi Maki³, Takashi Nakamura⁴, Yosuke Niwa³, Masahito Ueyama⁵, Masato Hayashi², Habura Borjigin², Yuji Yanagi¹, Nobuko Saigusa², Asia-MIP Group (1.Japan Agency for Marine-Earth Science and Technology, 2.National Institute for Environmental Studies, 3.Meteorological Research Institute, 4.Japan Meteorological Agency, 5.Osaka Prefecture University)

Keywords:Terrestrial, Synthesis, Carbon Dioxide

In the framework of Environment Research and Technology Development Funds (2-1401) from the Ministry of the Environment of Japan, we initiated synthesis analysis toward better estimations and understandings of terrestrial CO₂ budget in Asia. We used multiple different data products such as atmospheric inverse analysis (top-down estimation), terrestrial ecosystem models, remote sensing data, and data-driven models (bottom-up estimation). Our analysis focuses on (1) inter-decadal changes in terrestrial CO₂ fluxes at continental scales (Asia and Siberia), (2) testing consistency of terrestrial sink magnitude between top-down and bottom-up estimations in Asia, and (3) detection and analysis of ‘hotspot’ of terrestrial CO₂ budget changes in Siberia and tropical Asia. We will show these progresses, and discuss future direction of these studies.
Acknowledgement
This study was supported by the Environment Research and Technology Development Funds (2-1401) from the Ministry of the Environment of Japan, and the JSPS KAKENHI (grant No. 25281003).