中文摘要：

多个城市的空气颗粒物源解析结果表明,开放源是北方城市空气颗粒物的最主要贡献者,是影响空气颗粒物达标的重要源类,其中裸土风蚀尘是空气颗粒物最主要来源。以天津市为例,利用箱模型和源解析模型测算了天津市裸土风蚀型开放源的起尘量及其对城市空气颗粒物的贡献值。计算结果表明,裸土风蚀型开放源总悬浮颗粒物（TSP）的起尘量为13.18×10^4t/a,平均贡献值为103.53μg/m^3,PM10的起尘量为5.28×10^4t/a,平均贡献值为41.45μg/m^3。表明裸土风蚀的起尘量对环境空气质量的影响绝不能低估,应该重视裸土风蚀型开放源的污染控制。

英文摘要：

The atmospheric particulates source apportionment for many northern cities of China showed that the open sources were the key source that affecting the air quality,it was the dominate contributor of particulate matters.Among the different open sources,soil erosion by wind was a major source of urban ambient air particulate matter.A case study of Tianjin was performed in this paper,the emission inventory from the wind erosion open sources was calculated by Box model,and the contribution of the open sources to atmospheric particulate matter was estimated by chemical mass balance（CMB） model.The result shows that in Tianjin city,about 13.18×10^4 t/a of TSP and 5.28×10^4 t/a of PM10 were derived from wind erosion open sources,result in the contribution of wind erosion open sources to TSP and PM10 were 103.53 μg/m^3（39%） and 41.45 μg/m^3（25%） respectively.