In order to explore the effect of meteorological conditions on the pollutants concentration ,PM2 .5 sam-ples were collected in Urumqi urban area during October 2013 to October 2014 ,meteorological data were selected from weather stations monitoring on the same time for investigation .Results showed that :(1) the daily average con-centrations of PM2 .5 reached 84 .70 μg/m3 during the heating period in Urumqi ,which exceeded the 24-hour average second-level limit (75 μg /m3 ) of "Environmental air quality standard" (GB 3095-2012) ,and it was more than four times during the non-heating period (20 .66 μg/m3 ) .(2) The wind speed ,relative humidity ,temperature ,vapor pres-sure and the daily average concentrations of PM2 .5 existed significant relationship during the heating period ,relative hu-midity and PM 2 .5 concentrations were related significantly in non-heating period .%为探究气象条件对污染物浓度的影响,于2013年10月至2014年10月在乌鲁木齐市主城区采集PM 2.5样品,并选取同期气象站监测的气象数据进行分析.结果表明:(1)乌鲁木齐市采暖期PM 2.5日均值平均达到84.70μg/m 3,超出了《环境空气质量标准》(GB 3095—2012)中24 h平均二级限值(75μg/m 3),是非采暖期(20.66μg/m 3)的4倍多.(2)采暖期风速 、相对湿度 、气温 、水汽压与PM 2.5日均值极显著相关,非采暖期相对湿度与PM 2.5日均值极显著相关.
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