@article {16281,
	title = {Multiannual top-down estimate of HFC-23 emissions in East Asia},
	journal = {Environ Sci TechnolEnviron Sci Technol},
	volume = {49},
	number = {7},
	year = {2015},
	note = {Fang, XStohl, AYokouchi, YKim, JLi, SSaito, TPark, SHu, JengResearch Support, Non-U.S. Gov{\textquoteright}t2015/03/19 06:00Environ Sci Technol. 2015 Apr 7;49(7):4345-53. doi: 10.1021/es505669j. Epub 2015 Mar 30.},
	month = {Apr 07},
	pages = {4345-53},
	abstract = {Trifluoromethane (CHF3, HFC-23), with a 100-year global warming potential (GWP) of 12400, is regulated under the Kyoto Protocol. HFC-23 emissions in East Asia, especially in China, are currently thought to represent the majority of global HFC-23 emissions. This study provides both a bottom-up emission inventory and the multiannual top-down estimate of HFC-23 emissions in East Asia during 2007-2012. The new bottom-up inventory yields improved simulated HFC-23 mixing ratios compared to previous bottom-up inventories. The top-down estimate uses inverse modeling to further improve the model-measurement agreement. Results show that China contributed 94-98\% of all HFC-23 emissions in East Asia. Annual a posteriori emissions from China were around 6.3 Gg/yr during the period 2007-2010 after which they increased to 7.1 +/- 0.7 Gg/yr in 2011 and 8.8 +/- 0.8 Gg/yr in 2012. For the first time, this study also provides a top-down estimate of HFC-23/HCFC-22 (chlorodifluoromethane, CHClF2) coproduction ratios in non-CDM (Clean Development Mechanism) HCFC-22 production plants as well as in all HCFC-22 production plants in China.},
	keywords = {Air Pollutants/*analysis, China, Chlorofluorocarbons, Methane/*analysis, Far East, Global Warming},
	isbn = {1520-5851 (Electronic)0013-936X (Linking)},
	author = {Fang, X. and Stohl, A. and Yokouchi, Y. and Kim, J. and S Li, and T. Saito and S. Park and J. Hu}
}
