Zdroj: |
Fortems-Cheiney, A, Saunois, M, Pison, I, Chevallier, F, Bousquet, P, Cressot, C, Montzka, S A, Fraser, P J, Vollmer, M K, Simmonds, P G, Young, T D S, O'Doherty, S, Weiss, R F, Artuso, F, Barletta, B, Blake, D R, Li, S, Lunder, C, Miller, B R, Park, S, Park, S, Prinn, R, Saito, T, Steele, L P & Yokouchi, Y 2015, ' Increase in HFC-134a emissions in response to the success of the Montreal Protocol ', Journal of Geophysical Research: Atmospheres, vol. 120, no. 22, pp. 11728-11742 . https://doi.org/10.1002/2015JD023741 |
Popis: |
The 1,1,1,2-tetrafluoroethane (HFC-134a), an important alternative to CFC-12 in accordance with the Montreal Protocol on Substances that Deplete the Ozone Layer, is a high global warming potential greenhouse gas. Here we evaluate variations in global and regional HFC-134a emissions and emission trends, from 1995 to 2010, at a relatively high spatial and temporal (3.75° in longitude × 2.5° in latitude and 8 day) resolution, using surface HFC-134a measurements. Our results show a progressive increase of global HFC-134a emissions from 19 ± 2 Gg/yr in 1995 to 167 ± 5 Gg/yr in 2010, with both a slowdown in developed countries and a 20%/yr increase in China since 2005. A seasonal cycle is also seen since 2002, which becomes enhanced over time, with larger values during the boreal summer. |