Trifluoroacetic acid deposition from emissions of HFO-1234yf in India, China, and the Middle East

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/95675 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/95675 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/95675 archive 2 disk0/00/01/75/05 2021-10-18 11:39:59 2021-10-18 11:39:59 2021-10-18 11:39:59 article show David L.M. Barth M. Höglund-Isaksson L. 1786 0000-0001-7514-3135 Purohit P. 1873 0000-0002-7265-6960 Velders G.J.M. Glaser S. Ravishankara A.R. Trifluoroacetic acid deposition from emissions of HFO-1234yf in India, China, and the Middle East pub ECEPM We have investigated trifluoroacetic acid (TFA) formation from emissions of HFO-1234yf (CF3CFH2), its dry and wet deposition, and rainwater concentration over India, China, and the Middle East with GEOS-Chem and WRF-Chem models. We estimated the TFA deposition and rainwater concentrations between 2020 and 2040 for four previously published HFO-1234yf emission scenarios to bound the possible levels of TFA. We evaluated the capability of GEOS-Chem to capture the wet deposition process by comparing calculated sulfate in rainwater with observations. Our calculated TFA amounts over the USA, Europe, and China were comparable to those previously reported when normalized to the same emission. A significant proportion of TFA was found to be deposited outside the emission regions. The mean and the extremes of TFA rainwater concentrations calculated for the four emission scenarios from GEOS-Chem and WRF-Chem were orders of magnitude below the no observable effect concentration. The ecological and human health impacts now, and the continued use of HFO-1234yf in India, China, and the Middle East, are estimated to be insignificant based on the current understanding, as summarized by Neale et al. (2021). 2021-10-06 10.5194/acp-21-14833-2021 128 239 public Atmospheric Chemistry and Physics 21 19 14833-14849 TRUE 1680-7324 info:eu-repo/semantics/article