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China’s sizeable and uncertain carbon sink: a perspective from GOSAT

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  • Atmospheric Science
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Chinese Science Bulletin

Abstract

Despite the agreement that China’s terrestrial ecosystems can provide a carbon sink and offset carbon dioxide (CO2) emissions from fossil fuels, the magnitude and spatial distribution of the sink remain uncertain. Accurate quantification of the carbon sequestration capacity of China’s terrestrial ecosystems has profound scientific and policy implications. Here, we report on the magnitude and patterns of China’s terrestrial carbon sink using the global monthly CO2 flux data product from the Greenhouse gases Observing SATellite (GOSAT), the world’s first satellite dedicated to global greenhouse gas observation. We use the first year’s data from GOSAT (June 2009–May 2010) that are currently available to assess China’s biospheric carbon fluxes. Our results show that China’s terrestrial ecosystems provide a carbon sink of −0.21 Pg C a−1. The consumption of fossil fuels in China leads to carbon dioxide emissions of 1.90 Pg C a−1 into the atmosphere, approximately 11.1 % of which is offset by China’s terrestrial ecosystems. China’s terrestrial ecosystems play a significant role in offsetting fossil fuel emissions and slowing down the buildup of CO2 in the atmosphere. Our analysis based on GOSAT data offers a new perspective on the magnitude and distribution of China’s carbon sink. Our results show that China’s terrestrial ecosystems provide a sizeable and uncertain carbon sink, and further research is needed to reduce the uncertainty in its magnitude and distribution.

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Acknowledgments

This work was supported by the Strategic Priority Research Program-Climate Change: Carbon Budget and Relevant Issues of the Chinese Academy of Sciences (XDA05040401) and the National High-Tech R&D Program of China (2013AA122002). Jingfeng Xiao was supported by the National Natural Science Foundation through the MacroSystems Biology Program (1065777). We thank the NIES GOSAT Project for providing the GOSAT data. We also thank the anonymous reviewers for their constructive comments on the manuscript.

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Authors and Affiliations

  1. Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100094, China

    Li Zhang, Li Li & Liping Lei

  2. Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, 03824, USA

    Jingfeng Xiao

  3. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China

    Jing Li

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  1. Li Zhang
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Correspondence to Li Zhang.

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SPECIAL TOPIC: Greenhouse Gas Observation From Space: Theory and Application

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Zhang, L., Xiao, J., Li, L. et al. China’s sizeable and uncertain carbon sink: a perspective from GOSAT. Chin. Sci. Bull. 59, 1547–1555 (2014). https://doi.org/10.1007/s11434-014-0260-3

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  • DOI: https://doi.org/10.1007/s11434-014-0260-3

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