摘要
利用近3年长春市环境监测资料与同期的气象资料,统计分析了长春市主要污染物PM10的季节演变特征,并对PM10浓度与平均气温、降水量、相对湿度、能见度、平均风速和气压6个气象要素的统计相关性进行了初步研究。结果表明,3年中PM10年均浓度没有明显起伏,均在0.097～0.100mg/m3;PM10浓度具有明显的季节变化特征,冬季采暖期最高,春季沙尘期次之,夏季降雨期最低;3年中PM10污染以II级为主,占87.7%;PM10污染较重的当天,往往会伴随出现雾、烟幕、大风、沙尘等天气现象;PM10浓度与平均气温、降水量、能见度和平均风速呈显著负相关;与相对湿度和气压呈显著正相关。
Based on the environmental monitoring data and meteorological data in Changchun City during the last three years,seasonal variation characteristics of the main pollutant PM10 were analyzed. The statistical correlation between PM10 concentration and six meteorological factors was analyzed,including average temperature,precipitation,relative humidity,visibility,average wind speed and air pressure. The results showed that the PM10 concentration was about 0.097-0.100 mg/m3 from 2006 to 2008 and had no significant increasing or decreasing trend in the three years. The PM10 concentration in Changchun showed significant seasonal variations;it was obviously a bit higher in winter and spring,lower in summer. The PM10 pollution primarily attained Grade Ⅱ in the recent three years,and it accounted for 87.7%. PM10 pollution was heavier on the day when it was accompanied by fog,smog,gale and dust. The results showed that PM10 concentration had a negative correlation with the average temperature,precipitation,visibility and average wind speed,and had a positive correlation with relative humidity and air pressure.
基金
Supported by Social Welfare Research Fund of Ministry of Science & Technology(2005-DIB2J111)
Functional Expense Program of Basic Scientific Research of Shenyang Institute of Atmospheric Environment,China Meteorological Bureau(SYKYYW200901)
关键词
PM10
季节变化
气象要素
PM10
Seasonal variation
Meteorological factors
China
