摘要
利用2013年1—12月重庆沙坪坝区不同粒径颗粒物监测资料和同期气象观测数据,分析不同粒径颗粒物的污染特征,探讨气象因素对颗粒物质量浓度的影响关系。结果表明:(1)PM_(1.0)、PM_(2.5)、PM_(10)质量浓度呈现明显的非正态分布,其年均质量浓度分别为62.6μg/m^3、69.3μg/m^3、86.7μg/m^3;(2)3种粒径颗粒物均具有明显的日、月和季节变化特征,其日变化均呈现双峰双谷型,季节变化均为冬高夏低;(3)不同季节影响颗粒物浓度的气象因素各不相同,春季3种粒径颗粒物浓度均与气压呈显著正相关,与温度呈显著负相关;夏季则均与温度、日照时数呈显著正相关,与相对湿度呈显著负相关;秋、冬季均与降雨量、风速呈显著负相关。
Based on monitoring data of particulate matter （PM） and meteorological data from January to December 2013 in Shapingba District of Chongqing, the impact of meteorological conditions and pollution characteristics on mass concentrations of PM with different size ranges were investigated. The results were as follows： （ 1 ） the mass concentration of PM1.0, PM2.5 and PM10showed obviotts non-normal distribution, and the annual average mass concentrations were 62.6 μg/m3, 69.3 μg/m3 and 86.7 μg/m3. （2） The daily, monthly and seasonal variations of PM concentrations with different sizes were obvious. The daily variations of them showed type of double peak and valley. And they had significant seasonal variation with highest concentration in winter and lowest concentration in summer. （3） PM concentrations were significantly correlated with one or more meteorological parameters in different seasons. PM1.0, PM2.5 and PM10 had strong positive correlation with surface atmospheric pressure in spring, but negative correlation with ambient temperature. The
出处
《环境影响评价》
2018年第1期67-72,77,共7页
Environmental Impact Assessment
基金
国家自然科学基金面上项目(41375123)
