Abstract：
:Knowledge of the contribution that individual countries have made to global radiative forcing is important to the implementation of the agreement on "common but differentiated responsibilities" reached by the United Nations Framework Convention on Climate Change. Over the past three decades, China has experienced rapid economic development, accompanied by increased emission of greenhouse gases, ozone precursors and aerosols, but the magnitude of the associated radiative forcing has remained unclear. Here we use a global coupled biogeochemistry-climate model and a chemistry and transport model to quantify China's present-day contribution to global radiative forcing due to well-mixed greenhouse gases, short-lived atmospheric climate forcers and land-use-induced regional surface albedo changes. We find that China contributes 10% ± 4% of the current global radiative forcing. China's relative contribution to the positive (warming) component of global radiative forcing, mainly induced by well-mixed greenhouse gases and black carbon aerosols, is 12% ± 2%. Its relative contribution to the negative (cooling) component is 15% ± 6%, dominated by the effect of sulfate and nitrate aerosols. China's strongest contributions are 0.16 ± 0.02 watts per square metre for CO2 from fossil fuel burning, 0.13 ± 0.05 watts per square metre for CH4, -0.11 ± 0.05 watts per square metre for sulfate aerosols, and 0.09 ± 0.06 watts per square metre for black carbon aerosols. China's eventual goal of improving air quality will result in changes in radiative forcing in the coming years: a reduction of sulfur dioxide emissions would drive a faster future warming, unless offset by larger reductions of radiative forcing from well-mixed greenhouse gases and black carbon.
journal_name
Naturejournal_title
Natureauthors
Li B,Gasser T,Ciais P,Piao S,Tao S,Balkanski Y,Hauglustaine D,Boisier JP,Chen Z,Huang M,Li LZ,Li Y,Liu H,Liu J,Peng S,Shen Z,Sun Z,Wang R,Wang T,Yin G,Yin Y,Zeng H,Zeng Z,Zhou Fdoi
10.1038/nature17165subject
Has Abstractpub_date
2016-03-17 00:00:00pages
357-61issue
7594eissn
0028-0836issn
1476-4687pii
nature17165journal_volume
531pub_type
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