Recent Decreases in the Growth Rate of Atmospheric HCFC-22 Column Derived From the Ground-Based FTIR Harmonized Retrievals at 16 NDACC Sites
| dc.contributor.author | Zhou, M. | |
| dc.contributor.author | Langerock, B. | |
| dc.contributor.author | Vigouroux, C. | |
| dc.contributor.author | Smale, D. | |
| dc.contributor.author | Toon, G. | |
| dc.contributor.author | Polyakov, A. | |
| dc.contributor.author | Hannigan, J.W. | |
| dc.contributor.author | Mellqvist, J. | |
| dc.contributor.author | Robinson, J. | |
| dc.contributor.author | Notholt, J. | |
| dc.contributor.author | Strong, K. | |
| dc.contributor.author | Mahieu, E. | |
| dc.contributor.author | Palm, M. | |
| dc.contributor.author | Prignon, M. | |
| dc.contributor.author | Jones, N. | |
| dc.contributor.author | García, O. | |
| dc.contributor.author | Morino, I. | |
| dc.contributor.author | Murata, I. | |
| dc.contributor.author | Ortega, I. | |
| dc.contributor.author | Nagahama, T. | |
| dc.contributor.author | Wizenberg, T. | |
| dc.contributor.author | Flood, V. | |
| dc.contributor.author | Walker, K. | |
| dc.contributor.author | De Mazière, M. | |
| dc.date | 2024 | |
| dc.date.accessioned | 2024-11-19T11:06:32Z | |
| dc.date.available | 2024-11-19T11:06:32Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/13525 | |
| dc.description | 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. | |
| dc.language | eng | |
| dc.title | Recent Decreases in the Growth Rate of Atmospheric HCFC-22 Column Derived From the Ground-Based FTIR Harmonized Retrievals at 16 NDACC Sites | |
| dc.type | Article | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | Scientific | |
| dc.source.title | Geophysical Research Letters | |
| dc.source.volume | 51 | |
| dc.source.issue | 22 | |
| dc.source.page | e2024GL112470 | |
| Orfeo.peerreviewed | Yes | |
| dc.identifier.doi | 10.1029/2024GL112470 | |
| dc.identifier.url |