Recent Decreases in the Growth Rate of Atmospheric HCFC-22 Column Derived From the Ground-Based FTIR Harmonized Retrievals at 16 NDACC Sites
| العنوان: | Recent Decreases in the Growth Rate of Atmospheric HCFC-22 Column Derived From the Ground-Based FTIR Harmonized Retrievals at 16 NDACC Sites |
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| المؤلفون: | Zhou, Minqiang, Langerock, Bavo, Vigouroux, C., Smale, Dan, Toon, G., Polyakov, Alexander, Hannigan, J. W., Mellqvist, Johan, 1965, Robinson, John, Notholt, J., Strong, K., Mahieu, E., Palm, Mathias, Prignon, Maxime, 1992, Jones, N., Garcia, O., Morino, Isamu, Murata, Isao, Ortega, Ivan, Nagahama, Tomoo, Wizenberg, Tyler, Flood, Victoria A., Walker, K.A., De Maziere, M. |
| المصدر: | Geophysical Research Letters. 51(22) |
| الوصف: | 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. |
| وصف الملف: | electronic |
| URL الوصول: | https://research.chalmers.se/publication/543867 https://research.chalmers.se/publication/543867/file/543867_Fulltext.pdf |
| قاعدة البيانات: | SwePub |
| تدمد: | 19448007 00948276 |
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| DOI: | 10.1029/2024GL112470 |