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The first remote-sensing measurements of HFC-32 in the Earth's atmosphere by the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS)

journal contribution
posted on 14.09.2021, 09:29 by R Dodangodage, PF Bernath, CD Boone, J Crouse, JJ Harrison
Atmospheric hydrofluorocarbon (HFC) abundances are increasing rapidly because of the Montreal Protocol phase-out of the production and consumption of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). HFC-32 (CH2F2, difluoromethane) mole fractions (volume mixing ratios, VMRs) have been retrieved from infrared absorption spectra recorded from orbit with the Atmospheric Chemistry Experiment Fourier transform spectrometer (ACE-FTS) between 2004 and 2020. Global altitude-latitude distributions have been determined from the ACE-FTS VMR altitude profiles. The HFC-32 VMR time series have been computed and compared with values obtained from in situ flask measurements made by the National Oceanic and Atmospheric Administration (NOAA) Earth System Research Laboratory. HFC-32 abundances are increasing exponentially.

History

Citation

Journal of Quantitative Spectroscopy and Radiative Transfer Volume 272, September 2021, 107804

Author affiliation

Department of Physics and Astronomy

Version

AM (Accepted Manuscript)

Published in

Journal of Quantitative Spectroscopy and Radiative Transfer

Volume

272

Publisher

Elsevier

issn

0022-4073

eissn

1879-1352

Acceptance date

13/06/2021

Copyright date

2021

Available date

18/06/2022

Language

eng