Topic: Development and Application of the Global Carbon Assimilation System (GCAS)

Speaker: Chen Jingming

Time: 13: 30-15: 05, November 14, 2022 (Monday)

Venue: S818, Mong Man Wai Technology Building, Tsinghua University

Introduction to the Lecture:

Observations of atmospheric CO₂ concentrations provide important data for global carbon cycle research, which can be used to estimate the carbon source and sink of the global terrestrial ecosystem and the distribution of anthropogenic carbon emissions. However, the limited number of high-precision ground CO₂ concentration observation stations, and the low sensitivity of satellite column concentration observation to the change of near-surface concentration have led to big errors in carbon sink distribution obtained by the atmospheric inversion method. The Global Carbon Assimilation System (GCAS) is an atmospheric inversion and assimilation system with independent intellectual property rights of China, developed by Nanjing University with the support of the Ministry of Science and Technology, China. Compared with similar products in the world, the GCAS puts more emphasis on using the carbon flux estimated by the ecosystem model driven by surface remote sensing data as the basis of carbon assimilation, which solves the limitations of atmospheric CO₂ concentration observation. Recently, the Nanjing University team has developed the atmospheric inversion of anthropogenic carbon emissions in China by using high-density air pollutant observation, demonstrating broad application prospects of the GCAS.

Profile of the Speaker: Chen Jingming, Professor of the School of Geographical Sciences, Fujian Normal University, Professor of the Department of Geography, University of Toronto, Canada, President of the Academy of Carbon Neutrality, Fujian Normal University, Fellow of the Academy of Science of the Royal Society of Canada, and concurrently Director of International Institute for Earth System Science, Nanjing University. His main research fields are vegetation remote sensing and terrestrial ecosystem carbon-water cycle. He has published more than 430 SCI-indexed papers, with a total citation of more than 36,500 times and an H-index of 97 (Google Scholar). He is currently Editor-in-Chief of Remote Sensing of Environment, Associate Editor of Journal of Geophysical Research-Biogeosciences and Canadian Journal of Remote Sensing, Member of the Fluxnet Science Steering Committee of the United States, member of the Special Expert Group on Global Change and Response of the Ministry of Science and Technology of China, and member of the Overseas Experts Advisory Committee of the State Council Overseas Chinese Affairs Office.