中国区域HCFC-142b排放量模式反演研究

利用拉格朗日粒子扩散模式FLEXPART结合上甸子区域本底站在线观测HCFC-142b数据,采取自上而下的反演方法,估算了2009和2010年中国HCFC-142b的排放量分别为10.82kt/a和15.42kt/a,分别占全球HCFC-142b排放量的29.7%和45.8%.反演HCFC-142b排放量的空间分布结果显示其排放源主要集中在京津冀、四川、山东西部以及长江中下游地区,与相关研究中自下而上方法获得的排放量分布一致.模式反演源较先验源更接近观测数据,2009年相关系数从0.38提高到0.47,2010年相关系数则从0.60提高到0.65.

Study of Chinese HCFC-142b emission by inverse model

The inversion method was used to estimate China’s HCFC-142b emission by using Lagrangian particle dispersion model FLEXPART combined with the in-situ measurement data obtained from Shangdianzi regional atmospheric background station (SDZ). The Chinese HCFC-142b emissions in 2009 and 2010 were 10.82kt/a and 15.42kt/a, accounted for 29.7% and 45.8% of the global emissions, respectively. The spatial distribution of HCFC-142b emission shows high emission rate in Beijing, Tianjin, Sichuan, Shandong and in the middle and lower reaches of the Yangtze River, in consistent with the results by bottom-up method. The correlation coefficients of concentrations simulated from inversion results was higher than those from prior input, increasing from 0.38 to 0.47 in the year of 2009, and from 0.60 to 0.65 in the year of 2010.