Atmospheric HCFC-22, HFC-125, and HFC-152a at Cape Point, South Africa.
Atmospheric HCFC-22, HFC-125, and HFC-152a at Cape Point, South Africa.
复制标题
南非开普角的大气 HCFC-22、HFC-125 和 HFC-152a。
DOI：
10.1021/acs.est.9b01612
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发表时间：
2019
影响因子：
11.4
通讯作者：
Kuyper B
中科院分区：
文献类型：
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作者：
Kuyper B
2017年，在南非开普敦天文台（CPT）的空气样本中测量了一种氢氯氟烃和两种氢氟碳化合物（HCFC-22，HFC-125和HFC-152 a）。这些数据代表了南非西南部（SWSA）对这些化合物的首次大气测量。氟氯烃-22、氟化烃-125和氟化烃-152a的基准大气增长率估计分别为8.36、4.10和0.71 ppt/年。将CPT测量值与逆模型相结合来研究SWSA的排放量。对于所有三种卤化碳，开普敦被认为是西南偏南地区的主要来源。这些估计数是根据人口统计数据外推的，以估计整个南非的排放量。我们估计南非2017年HCFC-22、HFC-125和HFC-152 a的排放量分别为3.0（1.6-4.4）、0.8（0.5-1.2）和1.1（0.6-1.6）千兆克。就所有三种卤化碳而言，南非对全球排放量的贡献很小（<2.5%），但未来需要进行监测，以确保南非遵守《蒙特利尔议定书》及其修正案规定的法规。
One hydrochlorofluorocarbon and two hydrofluorocarbons (HCFC-22, HFC-125, and HFC-152a) were measured in air samples at the Cape Point observatory (CPT), South Africa, during 2017. These data represent the first such atmospheric measurements of these compounds from southwestern South Africa (SWSA). Baseline atmospheric growth rates were estimated to be 8.36, 4.10, and 0.71 ppt year–1for HCFC-22, HFC-125, and HFC-152a, respectively. The CPT measurements were combined with an inverse model to investigate emissions from SWSA. For all three halocarbons, Cape Town was found to be the dominant source within SWSA. These estimates were extrapolated, based on population statistics, to estimate emissions for the whole of South Africa. We estimate South Africa’s 2017 emissions to be 3.0 (1.6–4.4), 0.8 (0.5–1.2), and 1.1 (0.6–1.6) Gg year–1for HCFC-22, HFC-125, and HFC-152a, respectively. For all three halocarbons, South Africa’s contribution to global emissions is small (<2.5%), but future monitoring is needed to ensure South Africa’s compliance with regulation set out by the Montreal Protocol and its Amendments.