Global emissions of HFC-143a (CH3CF3) and HFC-32 (CH2F2) from in situ and air archive atmospheric observations

Global emissions of HFC-143a (CH3CF3) and HFC-32 (CH2F2) from in situ and air archive atmospheric observations
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来自现场和空气档案大气观测的 HFC-143a (CH3CF3) 和 HFC-32 (CH2F2) 全球排放量

DOI:
10.5194/acp-14-9249-2014
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发表时间:
2014-09
影响因子:
6.3
通讯作者:
G. Prinn
G. Prinn
中科院分区:
地球科学1区
文献类型:
--
作者:
B. Yao;R. H. J. Wang;A. J. Manning;G. Prinn

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抽象的。2003年至2012年期间,全球大气气体高级实验(AGAGE)进行了高频原位观测,结合可追溯到1977年的档案烧瓶测量,用于捕捉HFC-143 a(CH 3CF 3)和HFC-32(CH 2F 2)摩尔分数和大气排放量的快速增长。在这里,我们报告了这两种气体的第一次现场全球测量。HFC-143 a和HFC-32分别是第三和第六丰富的氢氟碳化合物,目前它们在大气辐射强迫方面对氢氟碳化合物做出了可观的贡献(2012年分别为1.7 ± 0.04和0.7 ± 0.02 mW m−2)。2012年,对流层低层中HFC-143 a的全球平均摩尔分数为13.4 ± 0.3 ppt(1σ),其增长率为1.4 ± 0.04 ppt yr−1; 2012年HFC-32的全球平均摩尔分数为6.2 ± 0.2 ppt,增长率为1.1 ± 0.04 ppt yr−1。在这项工作中提出的广泛的意见已经与大气传输模型相结合,以模拟全球大气丰度和全球排放量的估计。据估计,2012年全球排放的HFC-143 a为23 ± 3千兆克/年,HFC-32为21 ± 11千兆克/年,HFC-143 a的排放率估计将增加7 ± 5%/年,HFC-32的排放率将增加14 ± 11%/年。
Abstract. High-frequency, in situ observations from the Advanced Global Atmospheric Gases Experiment (AGAGE), for the period 2003 to 2012, combined with archive flask measurements dating back to 1977, have been used to capture the rapid growth of HFC-143a (CH3CF3) and HFC-32 (CH2F2) mole fractions and emissions into the atmosphere. Here we report the first in situ global measurements of these two gases. HFC-143a and HFC-32 are the third and sixth most abundant hydrofluorocarbons (HFCs) respectively and they currently make an appreciable contribution to the HFCs in terms of atmospheric radiative forcing (1.7 ± 0.04 and 0.7 ± 0.02 mW m−2 in 2012 respectively). In 2012 the global average mole fraction of HFC-143a was 13.4 ± 0.3 ppt (1σ) in the lower troposphere and its growth rate was 1.4 ± 0.04 ppt yr−1; HFC-32 had a global mean mole fraction of 6.2 ± 0.2 ppt and a growth rate of 1.1 ± 0.04 ppt yr−1 in 2012. The extensive observations presented in this work have been combined with an atmospheric transport model to simulate global atmospheric abundances and derive global emission estimates. It is estimated that 23 ± 3 Gg yr−1 of HFC-143a and 21 ± 11 Gg yr−1 of HFC-32 were emitted globally in 2012, and the emission rates are estimated to be increasing by 7 ± 5% yr−1 for HFC-143a and 14 ± 11% yr−1 for HFC-32.
DOI: 10.1002/2013gl059099
发表时间: 2014-04
影响因子: 5.2
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