<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fang, X.</style></author><author><style face="normal" font="default" size="100%">Stohl, A.</style></author><author><style face="normal" font="default" size="100%">Yokouchi, Y.</style></author><author><style face="normal" font="default" size="100%">Kim, J.</style></author><author><style face="normal" font="default" size="100%">S Li,</style></author><author><style face="normal" font="default" size="100%">T. Saito</style></author><author><style face="normal" font="default" size="100%">S. Park</style></author><author><style face="normal" font="default" size="100%">J. Hu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Multiannual top-down estimate of HFC-23 emissions in East Asia</style></title><secondary-title><style face="normal" font="default" size="100%">Environ Sci TechnolEnviron Sci Technol</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Air Pollutants/*analysis</style></keyword><keyword><style  face="normal" font="default" size="100%">China</style></keyword><keyword><style  face="normal" font="default" size="100%">Chlorofluorocarbons, Methane/*analysis</style></keyword><keyword><style  face="normal" font="default" size="100%">Far East</style></keyword><keyword><style  face="normal" font="default" size="100%">Global Warming</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2015</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Apr 07</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">7</style></number><volume><style face="normal" font="default" size="100%">49</style></volume><pages><style face="normal" font="default" size="100%">4345-53</style></pages><isbn><style face="normal" font="default" size="100%">1520-5851 (Electronic)0013-936X (Linking)</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">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.</style></abstract><accession-num><style face="normal" font="default" size="100%">25785483</style></accession-num><notes><style face="normal" font="default" size="100%">Fang, XStohl, AYokouchi, YKim, JLi, SSaito, TPark, SHu, JengResearch Support, Non-U.S. Gov't2015/03/19 06:00Environ Sci Technol. 2015 Apr 7;49(7):4345-53. doi: 10.1021/es505669j. Epub 2015 Mar 30.</style></notes><auth-address><style face="normal" font="default" size="100%">daggerNorwegian Institute for Air Research, 2007 Kjeller, Norway.double daggerState Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.section signNational Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan.paragraph signScripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093-0244, United States.</style></auth-address></record></records></xml>