The carbon balance of terrestrial ecosystems in China


Global terrestrial ecosystems absorbed carbon at a rate of 1–4 Pg yr-1 during the 1980s and 1990s, offsetting 10–60 per cent of the fossil-fuel emissions1,2. The regional patterns and causes of terrestrial carbon sources and sinks, however, remain uncertain1,2,3. With increasing scientific and political interest in regional aspects of the global carbon cycle, there is a strong impetus to better understand the carbon balance of China1,2,3. This is not only because China is the world’s most populous country and the largest emitter of fossil-fuel CO2 into the atmosphere4, but also because it has experienced regionally distinct land-use histories and climate trends1, which together control the carbon budget of its ecosystems. Here we analyse the current terrestrial carbon balance of China and its driving mechanisms during the 1980s and 1990s using three different methods: biomass and soil carbon inventories extrapolated by satellite greenness measurements, ecosystem models and atmospheric inversions. The three methods produce similar estimates of a net carbon sink in the range of 0.19–0.26 Pg carbon (PgC) per year, which is smaller than that in the conterminous United States5 but comparable to that in geographic Europe6. We find that northeast China is a net source of CO2 to the atmosphere owing to overharvesting and degradation of forests. By contrast, southern China accounts for more than 65 per cent of the carbon sink, which can be attributed to regional climate change, large-scale plantation programmes active since the 1980s and shrub recovery. Shrub recovery is identified as the most uncertain factor contributing to the carbon sink. Our data and model results together indicate that China’s terrestrial ecosystems absorbed 28–37 per cent of its cumulated fossil carbon emissions during the 1980s and 1990s.

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Figure 1: Carbon balance estimates of terrestrial ecosystems in China.
Figure 2: Carbon balance in the nine regions of China.
Figure 3: Terrestrial-biosphere carbon sink and its density in China, compared with those in geographic Europe and the conterminous United States.


  1. 1

    Solomon, S. et al. (eds) Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (Cambridge Univ. Press, 2007)

  2. 2

    Houghton, R. A. Balancing the global carbon budget. Annu. Rev. Earth Planet. Sci. 35, 313–347 (2007)

  3. 3

    Schimel, D. S. et al. Recent patterns and mechanisms of carbon exchange by terrestrial ecosystems. Nature 414, 169–172 (2001)

  4. 4

    Gregg, J., Andres, S. & Marland, G. China: emissions pattern of the world leader in CO2 emissions from fossil fuel consumption and cement production. Geophys. Res. Lett. 35 10.1029/2007GL032887 (2008)

  5. 5

    Pacala, S. W. et al. Consistent land- and atmosphere-based US carbon sink estimates. Science 292, 2316–2320 (2001)

  6. 6

    Janssens, I. A. et al. Europe’s terrestrial biosphere absorbs 7 to 12% of European anthropogenic CO2 emissions. Science 300, 1538–1542 (2003)

  7. 7

    Pan, Y. D., Luo, T. X., Birdsey, R., Hom, J. & Melillo, J. New estimates of carbon storage and sequestration in China’s forests: effects of age-class and method on inventory-based carbon estimation. Clim. Change 67, 211–236 (2004)

  8. 8

    Lu, A. F., Tian, H. Q., Liu, M. L., Liu, J. Y. & Melillo, J. M. Spatial and temporal patterns of carbon emissions from forest fires in China from 1950 to 2000. J. Geophys. Res. 111 10.1029/2005JD006198 (2006)

  9. 9

    Fang, J. Y., Guo, Z. D., Piao, S. L. & Chen, A. P. Terrestrial vegetation carbon sinks in China, 1981–2000. Sci. China Ser. D 50, 1341–1350 (2007)

  10. 10

    Piao, S. L., Fang, J. Y., Zhou, L. M., Tan, K. & Tao, S. Biomass carbon accumulation by China’s grasslands. Glob. Biogeochem. Cycles 21 10.1029/2005GB002634 (2007)

  11. 11

    Ciais, P., Bousquet, P., Freibauer, A. & Naegler, T. Horizontal displacement of carbon associated with agriculture and its impacts on atmospheric CO2 . Glob. Biogeochem. Cycles 21 10.1029/2006GB002741 (2007)

  12. 12

    Wang, S. Q. et al. Land-use change and its effect on carbon storage in Northeast China: an analysis based on Landsat TM data. Sci. China Ser. C 45, 40–46 (2002)

  13. 13

    Liu, J. et al. China’s changing landscape during the 1990s: large-scale land transformations estimated with satellite data. Geophys. Res. Lett. 32 10.1029/2004GL021649 (2005)

  14. 14

    Huang, Y. & Sun, W. J. Changes in topsoil organic carbon of croplands in mainland China over the last two decades. Chin. Sci. Bull. 51, 1785–1803 (2006)

  15. 15

    Lal, R. Offsetting China’s CO2 emissions by soil carbon sequestration. Clim. Change 65, 263–275 (2004)

  16. 16

    Stephens, B. B. et al. Weak northern and strong tropical land carbon uptake from vertical profiles of atmospheric CO2 . Science 316, 1732–1735 (2007)

  17. 17

    Gurney, K. R. et al. Sensitivity of atmospheric CO2 inversion to potential biases in fossil fuel emissions. J. Geophys. Res. 110 10.1029/2004JD005373 (2005)

  18. 18

    Peylin, P. et al. Daily CO2 flux estimates over Europe from continuous atmospheric measurements: 1, inverse methodology. Atmos. Chem. Phys. 5, 3173–3186 (2005)

  19. 19

    Rodenbeck, C. & Heimann, M. Jena CO2 inversion 〈〉 (2008)

  20. 20

    Ciais, P. et al. The impact of lateral carbon fluxes on the European carbon balance. Biogeosci. Discuss 3, 1529–1559 (2006)

  21. 21

    Folberth, G., Hauglustaine, D. A., Ciais, P. & Lathiere, J. On the role of atmospheric chemistry in the global CO2 budget. Geophys. Res. Lett. 32 10.1029/2004GL021812 (2005)

  22. 22

    Food. and Agriculture Organization of the United States. FAO: Statistics〉 (2004)

  23. 23

    Sitch, S. et al. Evaluation of the terrestrial carbon cycle, future plant geography and climate carbon cycle feedbacks using five dynamic global vegetation models (DGVMs). Glob. Change Biol. 14 10.1111/j.1365–2486.2008.01626.x (2008)

  24. 24

    Fang, J. Y., Piao, S. L., He, J. S. & Ma, W. H. Increasing terrestrial vegetation activity in China, 1982–1999. Sci. China Ser. C 47, 229–240 (2004)

  25. 25

    Food and Agriculture Organization of the United Nations. State of the World Forests. Forestry Paper No. 140 (Food and Agriculture Organization of the United Nations, 2001)

  26. 26

    Fang, J. Y., Chen, A. P., Peng, C. H., Zhao, S. Q. & Ci, L. Changes in forest biomass carbon storage in China between 1949 and 1998. Science 292, 2320–2322 (2001)

  27. 27

    Huang, Y., Zhang, W., Sun, W. J. & Zheng, X. H. Net primary production of Chinese croplands from 1950 to 1999. Ecol. Appl. 17, 692–701 (2007)

  28. 28

    Shen, S. (ed.) Chinese Soil Fertility (Chinese Agricultural Press, 1998)

  29. 29

    Marland, G., Boden, T. A. & Andres, R. J. in Trends: A Compendium of Data on Global Change.〉 (Carbon Dioxide Information Analysis Center, US Department of Energy, 2008)

  30. 30

    Field, C. B. & Fung, I. Y. The not-so-big US carbon sink. Science 285, 544–545 (1999)

  31. 31

    Ohara, T. et al. An Asian emission inventory of anthropogenic emission sources for the period 1980-2020. Atmos. Chem. Phys. 7, 4419–4444 (2007)

  32. 32

    Department of Forest Resource and Management. Forest Resources of China 1949-1993 (Department of Forest Resource and Management, Chinese Ministry of Forestry, 1996)

  33. 33

    Tucker, C. J. et al. Higher northern latitude normalized difference vegetation index and growing season trends from 1982 to 1999. Int. J. Biometeorol. 45, 184–190 (2001)

  34. 34

    Zhou, L. M. et al. Variations in northern vegetation activity inferred from satellite data of vegetation index during 1981 to 1999. J. Geophys. Res. 106, 20069–20083 (2001)

  35. 35

    Department of Animal Husbandry and Veterinary &. Commission for Integrated Survey of Natural Resources. Data on Grassland Resources of China (China Agricultural Science and Technology Press, 1994)

  36. 36

    Editorial Committee for China’s Agricultural Yearbook. China’s Agricultural Yearbook 1982 to 1999 (Agriculture Press, 2000)

  37. 37

    Piao, S. L. et al. Interannual variations of monthly and seasonal normalized difference vegetation index (NDVI) in China from 1982 to 1999. J. Geophys. Res. 108 10.1029/2002JD002848 (2003)

  38. 38

    National. Soil Survey Office (eds) Soil Species of China Vols 1–6 (China Agricultural Press, 1993–1996)

  39. 39

    Kaminski, T., Knorr, W., Rayner, P. J. & Heimann, M. Assimilating atmospheric data into a terrestrial biosphere model: a case study of the seasonal cycle. Glob. Biogeochem. Cycles 16 10.1029/2001GB001463 (2002)

  40. 40

    Roedenbeck, C., Houweling, S., Gloor, M. & Heimann, M. CO2 flux history 1982-2001 inferred from atmospheric data using a global inversion of atmospheric transport. Atmos. Chem. Phys. 3, 1919–1964 (2003)

  41. 41

    Levy, P. E., Cannell, M. G. R. & Friend, A. D. Modelling the impact of future changes in climate, CO2 concentration and land use on natural ecosystems and the terrestrial carbon sink. Glob. Environ. Change 14, 21–30 (2004)

  42. 42

    Sitch, S. et al. Evaluation of ecosystem dynamics, plant geography and terrestrial carbon cycling in the LPJ dynamic global vegetation model. Glob. Change Biol. 9, 161–185 (2003)

  43. 43

    Krinner, G. et al. A dynamic global vegetation model for studies of the coupled atmosphere-biosphere system. Glob. Biogeochem. Cycles 19 10.1029/2003GB002199 (2005)

  44. 44

    Woodward, F. I. & Lomas, M. R. Vegetation dynamics – simulating responses to climatic change. Biol. Rev. Camb. Philos. Soc. 79, 643–670 (2004)

  45. 45

    Cox, P. M. Description of the “TRIFFID” Dynamic Global Vegetation Model. Technical Note 24 (Hadley Centre, 2001)

  46. 46

    Mitchell, T. D. & Jones, P. D. An improved method of constructing a database of monthly climate observations and associated high-resolution grids. Int. J. Climatol. 25, 693–712 (2005)

  47. 47

    Keeling, C. D. & Whorf, T. P. Atmospheric CO2 Records From Sites In The SIO Air Sampling Network. Carbon Dioxide Information Analysis Center〉 (2005)

  48. 48

    Brown, S. Measuring carbon in forests: current status and future challenges. Environ. Pollut. 116, 363–372 (2002)

  49. 49

    Houghton, R. A. Aboveground forest biomass and the global carbon balance. Glob. Change Biol. 11, 945–958 (2005)

  50. 50

    Phillips, D. L., Brown, S. L., Schroeder, P. E. & Birdsey, R. Toward error analysis of large scale forest carbon budgets. Glob. Ecol. Biogeogr. 9, 305–313 (2000)

  51. 51

    Fang, J. Y. & Chen, A. P. Dynamic forest biomass carbon pools in China. Acta Bot. Sin. 43, 967–973 (2001)

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The authors wish to thank P. Friedlingstein for comments and discussions, the dynamic global vegetation models evaluation participants from ref. 23 for access to their data, S. Szopa for providing carbon emissions of non-CO2 species, L. M. Zhou for providing the Global Inventory Monitoring and Modelling Studies normalized difference vegetation index data, H. F. Hu for providing shrub biomass data and F. Y. Wei for collecting the climate data. For the inversions, we thank all experimentalists who contributed to the GLOBALVIEW-CO2 product and the CARBOEUROPE measurements, C. Rodenbeck, P. J. Rayner, and P. K. Patra for providing their inversion modelling results and T. Machida for providing vertical profiles from three stations over Siberia. We also thank Commissariat à l’Energie Atomique for computing support. This study was supported by the Foundation for the Author of National Excellent Doctoral Dissertation of China (FANEDD-200737), the National Natural Science Foundation of China (#90711002 and #30721140306), the Knowledge Innovation Program of the Chinese Academy of Sciences (#KZCX1–SW–01–13) and the State Forestry Administration of China. S.S. was supported by the Joint DECC, Defra and MoD Integrated Climate Programme – DECC/Defra (GA01101), MoD (CBC/2B/0417_Annex C5). One visit of S.P. to LSCE was funded by the Reseau Francilien de Développement Soutenable.

Author Contributions S.P., J.F., P.C. and P.P. designed the research; J.F. performed the forest inventory data analysis; S.P. performed the shrub biomass analysis; Y.H. performed the cropland soil carbon storage analysis; S.P. and T.W. performed the soil inventory data analysis; S.P., P.C. and T.W. performed later carbon flux analysis; P.P., P.C. and S.P. performed the inversion modelling analysis; S.P., S.S. and P.C. performed the terrestrial biogeochemical modelling analysis. All authors contributed to the interpretation of the results and the writing of the paper.

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Correspondence to Shilong Piao or Jingyun Fang.

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Piao, S., Fang, J., Ciais, P. et al. The carbon balance of terrestrial ecosystems in China. Nature 458, 1009–1013 (2009).

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