China's terrestrial carbon balance : contributions from multiple global change factors Tian, Hanqin Melillo, Jerry M. Lu, Chaoqun Kicklighter, David W. Liu, Mingliang Ren, Wei Xu, Xiaofeng Chen, Guangsheng Zhang, Chi Pan, Shufen Liu, Jiyuan Running, Steven W. 2011-04-18T18:47:53Z 2011-09-30T08:27:48Z 2011-03-31
dc.description Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 25 (2011): GB1007, doi:10.1029/2010GB003838. en_US
dc.description.abstract The magnitude, spatial, and temporal patterns of the terrestrial carbon sink and the underlying mechanisms remain uncertain and need to be investigated. China is important in determining the global carbon balance in terms of both carbon emission and carbon uptake. Of particular importance to climate-change policy and carbon management is the ability to evaluate the relative contributions of multiple environmental factors to net carbon source and sink in China's terrestrial ecosystems. Here the effects of multiple environmental factors (climate, atmospheric CO2, ozone pollution, nitrogen deposition, nitrogen fertilizer application, and land cover/land use change) on net carbon balance in terrestrial ecosystems of China for the period 1961–2005 were modeled with newly developed, detailed historical information of these changes. For this period, results from two models indicated a mean land sink of 0.21 Pg C per year, with a multimodel range from 0.18 to 0.24 Pg C per year. The models' results are consistent with field observations and national inventory data and provide insights into the biogeochemical mechanisms responsible for the carbon sink in China's land ecosystems. In the simulations, nitrogen deposition and fertilizer applications together accounted for 61 percent of the net carbon storage in China's land ecosystems in recent decades, with atmospheric CO2 increases and land use also functioning to stimulate carbon storage. The size of the modeled carbon sink over the period 1961–2005 was reduced by both ozone pollution and climate change. The modeled carbon sink in response to per unit nitrogen deposition shows a leveling off or a decline in some areas in recent years, although the nitrogen input levels have continued to increase. en_US
dc.description.sponsorship This study has been supported by NASA IDS Program (NNG04GM39C), NASA LCLUC Pr o g ram (NNX08AL73G_S01), and China’s Ministry of Science and Technology (MOST) 973 Program (2002CB412500). en_US
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dc.identifier.citation Global Biogeochemical Cycles 25 (2011): GB1007 en_US
dc.identifier.doi 10.1029/2010GB003838
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.subject China en_US
dc.subject Terrestrial carbon sink en_US
dc.subject Ecosystem model en_US
dc.title China's terrestrial carbon balance : contributions from multiple global change factors en_US
dc.type Article en_US
dspace.entity.type Publication
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Text S1: Supporting information, including development of input data, simulation of land use– and fire-related effects on terrestrial carbon balance, additional model validation, relative importance of environmental factors on regional carbon balances, model intercomparisons, relative importance of interactions among environmental factors on carbon balance, and figures and tables.
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