China’s Hydrofluorocarbon Emissions for 2011−2017 Inferred from Atmospheric Measurements
China’s Hydrofluorocarbon Emissions for 2011−2017 Inferred from Atmospheric Measurements
复制标题
根据大气测量推算2011-2017年中国氢氟碳化合物排放量
DOI：
10.1021/acs.estlett.9b00319
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发表时间：
2019
影响因子：
10.9
通讯作者：
Ronald G. Prinn
中科院分区：
文献类型：
--
作者：
Bo Yao;Xuekun Fang;Martin K. Vollmer;Stefan Reimann;Liqu Chen;Shuangxi Fang;Ronald G. Prinn
Hydrofluorocarbons (HFCs) have been widely used in China to replace ozone-depleting substances (ODSs) that must be phased out under the Montreal Protocol. Few studies have reported on HFC emissions in China, especially for recent years and using top-down approaches based on atmospheric measurements. Here we used flask andin situmeasurements for nine HFCs from seven sites across China over the period of 2011–2017, and FLEXPART-model-based Bayesian inverse modeling, to estimate HFC emission magnitudes and changes in China. We found that emissions of HFC-32 (CH2F2), HFC-125 (CHF2CF3), HFC-134a (CH2FCF3), HFC-227ea (CF3CHFCF3), and HFC-245fa (CHF2CH2CF3) have been increasing fast over this period while emissions of HFC-143a (CH3CF3), HFC-152a (CH3CHF2), HFC-236fa (CF3CH2CF3), and HFC-365mfc (CH3CF2CH2CF3) have been relatively stable. Total CO2-equivalent emissions of the nine HFCs increased from ∼60 Tg year–1in 2011 to ∼100 Tg year–1in 2017. Among these nine HFCs, HFC-134a (39%) and HFC-125 (35%) make the largest contributors to the national total HFC CO2-equivalent emissions. Cumulative contributions from China’s HFC emissions to the global total HFC mole fractions and their related radiative forcing increased from 1.0% in 2005 to 10.7% in 2017. Upon comparison of global emissions with the sum of emissions from China and developed countries, an increasing difference is observed over recent years, which points to substantial additional HFC emissions from other developing countries under the Kyoto Protocol.
