Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.11765/16372
Recent Decreases in the Growth Rate of Atmospheric HCFC‐22 Column Derived From the Ground‐Based FTIR Harmonized Retrievals at 16 NDACC Sites
Title: Recent Decreases in the Growth Rate of Atmospheric HCFC‐22 Column Derived From the Ground‐Based FTIR Harmonized Retrievals at 16 NDACC Sites
Authors: Zhou, MinqiangLangerock, BavoVigouroux, CorinneSmale, DanToon, Geoffrey C.Polyakov, AlexanderHannigan, James W.Mellqvist, JohanRobinson, JohnNotholt, JustusStrong, KimberlyMahieu, EmmanuelPalm, MathiasPrignon, MaximeJones, NicolasGarcía Rodríguez, Omaira Elena ORCID RESEARCHERID Autor AEMETMorino, IsamuMurata, IsaoOrtega, IvanNagahama, TomooWizenberg, TylerFlood, VictoriaWalker, KaleyDe Mazière, Martine
Keywords: HCFC-22; FTIR; NDACC; Montreal Protocol; Growth
Issue Date: 2024
Publisher: Wiley; American Geophysical Union
Citation: Geophysical Research Letters. 2024, 51(22), e2024GL112470
Publisher version: https://doi.org/10.1029/2024GL112470
Abstract: HCFC-22 is an ozone-depleting substance with a greenhouse effect. The atmospheric mole fractions of HCFC-22 have been increasing since the 1950s. Within the NDACC-IRWG network, HCFC-22 mol fractions can be retrieved from solar absorption spectra measured by ground-based FTIR. However, only a few sites have provided HCFC-22 data sets. Here, we demonstrate a harmonized FTIR HCFC-22 retrieval strategy and generate a new global NDACC-IRWG HCFC-22 data set at 16 FTIR sites. The systematic and random uncertainties are 5.3%–8.7% and 3.2%–8.0%, respectively. A maximum HCFC-22 column annual growth rate was observed in 2009 with a mean of 7.65 ± 1.39 ppt/year, and the HCFC-22 annual growth rate decreased to 3.57 ± 1.39 ppt/year (2016–2020) and 2.15 ± 2.09 ppt/year (2021–2023). The annual growth rates derived from the FTIR measurements are compared to the ones derived from NOAA surface flask samplings and ACE-FTS satellite measurements, and the three independent data sets show a good agreement.
Sponsorship : This study is supported by the National key R&D program (2023YFC3705202).
URI: http://hdl.handle.net/20.500.11765/16372
ISSN: 0094-8276
1944-8007
Appears in Collections:Artículos científicos 2023-2026


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