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The size of the land carbon sink in China

Matters Arising to this article was published on 16 March 2022

The Original Article was published on 28 October 2020

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Fig. 1: Land–atmosphere CO2 flux over China.
Fig. 2: Representativeness of site Shangri-La in the inversion system.

Data availability

Atmospheric CO2 mole fraction data used in the reference, S0 and S1 inversions were collected from the following databases of atmospheric measurements: the National Oceanic and Atmospheric Administration Earth System Research Laboratory archive (Carbon Cycle Greenhouse Gases,; the World Data Centre for Greenhouse Gases (; the Réseau Atmosphérique de Mesure des Composés à Effet de Serre database (; the Integrated Carbon Observation System–Atmospheric Thematic Center (; the National Institute for Environmental Studies ( CO2 mole fraction data used in the S0 and S1 inversions from the Chinese sites were retrieved from The reference CAMS inversion results are available from!/dataset/cams-global-greenhouse-gas-inversion?tab=form. The results of the high-resolution WRF-Chem simulation for Fig. 2 are available from

Code availability

The CAMS inversion system is available on request from F.C. WRF-Chem V3.9.1 is maintained centrally and made available by the National Oceanic and Atmospheric Administration/Earth System Research Laboratories/Global Systems Division (


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This study is supported by the Second Tibetan Plateau Scientific Expedition and Research Program (2019QZKK0405), the National Natural Science Foundation of China (Basic Science Center for Tibetan Plateau Earth System grant number 41988101 and grant number 42171096, 42001104 and 42101090) and the Regional Carbon Cycle Assessment and Processes-2 of the Global Carbon Project. F.C. is financially supported by the Copernicus Atmosphere Monitoring Service, implemented by the European Centre for Medium-Range Weather Forecasts on behalf of the European Commission. H.T. is financially supported by the US National Science Foundation (grant number 1903722). S.J. is supported by the R&D Program for Oceans and Polar Regions of the National Research Foundation (NRF) funded by the Ministry of Science and ICT(NRF-2020M1A5A1110493). We thank J. Zhu for discussions on carbon accumulation in domestic wood products.

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Authors and Affiliations



Y.W. and X.W. designed the study. Y.W., X.W. and D.Z. coordinated the author team. Y.W., X.W., K.W., F.C. and J. Lian performed the analysis. Y.W., X.W. and D.Z. led the writing of the manuscript with contributions from all authors.

Corresponding authors

Correspondence to Xuhui Wang or Dan Zhu.

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The authors declare no competing interests.

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Supplementary Information

This file contains Supplementary Text 1–3, Figs. 1 and 2, Supplementary Table 1 and References.

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Wang, Y., Wang, X., Wang, K. et al. The size of the land carbon sink in China. Nature 603, E7–E9 (2022).

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