TY - JOUR
T1 - Atmospheric HCFC-22, HFC-125, and HFC-152a at Cape Point, South Africa
AU - Kuyper, Brett
AU - Say, Daniel
AU - Labuschagne, Casper
AU - Lesch, Timothy
AU - Joubert, Warren R.
AU - Martin, Damien
AU - Young, Dickon
AU - Khan, M. Anwar H.
AU - Rigby, Matthew
AU - Ganesan, Anita L.
AU - Lunt, Mark F.
AU - O’dowd, Colin
AU - Manning, Alistair J.
AU - O’doherty, Simon
AU - Davies-coleman, Michael T.
AU - Shallcross, Dudley E.
PY - 2019/8/6
Y1 - 2019/8/6
N2 - 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–1 for 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–1 for 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.
AB - 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–1 for 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–1 for 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.
U2 - 10.1021/acs.est.9b01612
DO - 10.1021/acs.est.9b01612
M3 - Article
VL - 53
SP - 8967
EP - 8975
JO - Environmental Science and Technology
JF - Environmental Science and Technology
SN - 0013-936X
IS - 15
ER -