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Increase in HFC-134a emissions in response to the success of the Montreal Protocol
- Author(s): Fortems-Cheiney, A
- Saunois, M
- Pison, I
- Chevallier, F
- Bousquet, P
- Cressot, C
- Montzka, SA
- Fraser, PJ
- Vollmer, MK
- Simmonds, PG
- Young, D
- O'Doherty, S
- Weiss, RF
- Artuso, F
- Barletta, B
- Blake, DR
- Li, S
- Lunder, C
- Miller, BR
- Park, S
- Prinn, R
- Saito, T
- Steele, LP
- Yokouchi, Y
- et al.
Abstract
©2015. American Geophysical Union. 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 8day) resolution, using surface HFC-134a measurements. Our results show a progressive increase of global HFC-134a emissions from 19±2Gg/yr in 1995 to 167±5Gg/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.
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