长春市大气中PM_(10)本地源和外来源解析对比研究

Source Apportionment of Local and Regional Sources in the Atmosphere of Changchun

利用单粒子后向轨迹模型与化学质量平衡模型(CMB)相结合的方法,分别对长春市大气中PM10外来源和本地源贡献率进行源解析研究。CMB 8.2的解析结果中,工业燃煤和以钢铁尘为主的工业尘是外来可吸入颗粒物的最主要来源,非采暖期、采暖期的贡献率分别为13.04%、32.56%和29.75%、14.66%;而机动车尾气和道路尘则是本地可吸入颗粒物的最主要来源,非采暖期、采暖期贡献率分别为39.24%和33.86%。HYSPLIT模型分析,2011年9月30日(非采暖期)对于长春市大气中可吸入颗粒物影响较大的城市为通辽、白城、四平等;2012年3月1日(采暖期)的外来源则来源于兴安盟、白城、松原、吉林以及牡丹江市。

The combination of HYSPLIT and CMB is used to compute the source apportionment of the regional and local sources in the atmosphere of Changchun respectively. The analytical results by CMB8.2 indicate the dust which is from the industrial coal and steel is the major sources of the regional PM10, and the source apportionment of the non heating and heating period are 13.04% , 32.56% and 29.75% , 14.66%. The dust which is composed of motor vehicle exhaust and the road is the major source for local PM10, the source apportionment in the non heat- ing and heating period are 39.24% and 33.86%. The results of HYSPLIT are suggesting that the cities such as Tongliao, Baicheng and Siping have an impact on the regional PM10 in the non heating period, whereas the regional PM10 is from Xingan League, Baieheng, Songyuan and Mudanjiang for the heating period.