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中文摘要：
针对我国高寒地区典型城市哈尔滨、大庆和齐齐哈尔的环境空气污染问题,在获取2014—2016年3座城市大气污染物浓度数据的基础上,分析研究了大气污染物PM2.5、PM10、SO2和NO2的浓度变化特征、主要来源和集中度。结果表明,齐齐哈尔市PM2.5的年平均浓度为35.28μg/m3,已接近国家环境空气质量标准,哈尔滨和大庆市PM2.5分别下降28.82%和13.89%,初步完成了《大气污染防治行动计划》要求规定指标;春夏两季PM2.5、PM10、NO2和SO2浓度均明显低于冬季,每年从10月开始大气污染物浓度呈现上升趋势;PM2.5的二次转化可能是导致PM2.5/PM10比值在1月、2月、7月、11月和12月出现高峰的主要原因;哈大齐大气污染物集中度（PCD）较大值出现在11月、12月、1月和2月,冬季燃煤供暖和气象条件是影响其环境空气质量的主要因素。研究结果将为我国高寒地区城市大气污染控制与治理提供科学依据和参考价值。
英文摘要：
The environmental air pollution of Harbin-Daqing-Qiqihaer industrial district in Chinese cold region is investigated, to obtain the air pollutants concentrations in these three cities from 2014 to 2016. The concentration variation characteristics, major sources and pollution concentration degree （PCD） of air pollutants including PM2.5, PM10, SO2 and NO2 were analyzed. The results showed that average concentration of PM2.5 in Qiqihaer is 35.28μg/m^3 closed to national ambient air quality standards of China. The PM2.5 concentration in Harbin and Daqing decreased 28. 82% and 13.89% , respectively, the preliminarily completed the index requirement of action plan for prevention and control of air pollution. The concentrations of PM2.5 , PM10, NO2 and SO2 in spring and summer were significantly lower than those in winter, and the air pollutants begins to increase from October. Secondary transformation of PM2.5 may be lead to the high values of PM2.5/PM10 ratio in January, February, July, November and December. Pollution concentration degree （PCD） of air pollutants has larger values in November, December, January and February, and the coal-fired heating and meteorological conditions in winter may be the main factors that influence the ambient air quality. The research results will provide scientific basis and reference value for controlling and managing urban air pollution in cold region.
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