【摘要】 目的分析2006—2010年乌鲁木齐市主要污染物浓度时空变化特征。方法收集乌鲁木齐市2006—2010年PM10、SO₂和NO₂的日均浓度监测数据,分析其年度、区域、采暖期、非采暖期分布特征并进行综合评价。结果主要污染物SO₂和PM10年均浓度整体均呈下降趋势,2010年SO₂年均浓度较2006年下降22.6%,PM10年均浓度降低11.9%。2010年NO₂年均浓度较2006年升高了4.7%。非采暖期污染物浓度达标,PM10和NO₂浓度均呈上升趋势。采暖期SO₂、PM10、NO₂平均浓度分别是非采暖期的6.0～7.4倍、1.7～3.4倍、1.4～1.7倍,市区南部污染物浓度较高。结论 2006—2010年乌鲁木齐市空气质量保持稳定并持续改善,非采暖期为复合污染特征,采暖期为煤烟型污染。更多还原

【Abstract】 Objective To analyze the spatiotemporal variation characteristics of main air pollutants in the city of Urumqi during 2006 to 2010.Methods The environmental monitoring data of PM10,SO₂ and NO₂ in Urumqi during 2006-2010 were collected,the yearly and regional,heating seasonal and non -heating seasonal characteristics were analyzed,then a comprehensive assessment was done.Results The annual average concentration of main air pollutants including PM10 and SO₂ decreased as a whole.The annual concentration of SO₂ has reduced 22.6%and the PM10 reduced by 11.9%compared with the same term in 2006.Nevertheless,the annual concentration of NO₂ increased by 4.7%.The concentration of main air pollutants in the non-heating season all met the national GradeⅡair quality standard and the concentration of PM10 and NO₂ in the non-heating season all increased.The concentration of SO₂,PM10 and NO₂ in the heating season was 6.0-7.4,1.7-3.4, 1.4-1.7 times as that in the non-heating season,respectively.And the south of city had undergone higher pollutants concentrations.Conclusion The air quality keeps stable and to be improved continuously in Urumqi during 2006-2010. Combined pollution characteristics in non-heating seasons and coal smog pollution characteristics in the heating seasons have been observed in the present investigation.更多还原