【摘要】 全面分析2013年西安市13个国控环境空气质量自动监测子站PM2.5监测数据。结果表明:2013年西安市环境空气中PM2.5年均值为105μg/m3,超过《环境空气质量标准》(GB 3095—2012)二级要求(35μg/m3)200.0%,污染较严重;西安市各子站PM2.5月均值总体呈两边高、中间低的"V"型趋势,全市及各子站PM2.5月均值分别为44~206、32~275μg/m3;采暖期(上半年采暖期为1—3月,下半年采暖期为11—12月)、非采暖期(4—10月)PM2.5平均值分别为156、70μg/m3;上、下半年采暖期PM2.5平均值分别为178、124μg/m3;西安市气象风力以微风为主,雨天集中在5—9月,期间PM2.5月均值小于80μg/m3。更多还原

【Abstract】 It comprehensively analysed the PM2.5 monitoring data based on 13 ambient air quality monitoring stations of Xi’an in 2013.The results showed that Xi’an’s annual average concentration value of PM2.5in 2013was105μg/m3,more than 200.0% of secondary standard of"Ambient air quality standard"(GB 3095-2012),it was polluted seriously.The monthly average concentration value of PM2.5in each station of Xi’an showed higher on both sides,but lowwer in the middle,liked"V"shaped trend.The monthly average value of PM2.5in city and each child station was 44-206,32-275μg/m3 respectively.The average concentration of PM2.5in heating period(the first half of the heating period from January to March and the latter half of the heating period from November to December)and non-heating period(from April to October)was 156,70μg/m3 respectively.The average value of PM2.5in heating period of the first half year and the latter half year were 178,124μg/m3 respectively.Xi’an meteorological wind was given priority to with breeze,and rainy days was concentrated on May to September,and the monthly average value of PM2.5 was less than 80μg/m3 during this time.更多还原