沧州市冬春季PM_(10)污染特征及其影响因素  

The pollution characteristics and influencing factors of PM_(10) mass concentration in winter and spring at Cangzhou city

作　　者：王剑[1] 徐美[1] 叶霞[1] 张文育[1] 刘伟[1] 

机构地区：[1]沧州师范学院化学与环境科学系,沧州061001

出　　处：《干旱区资源与环境》2014年第7期46-51,共6页Journal of Arid Land Resources and Environment

基　　金：国家重点基础研究发展规划(973)项目(2007CB407303)资助

摘　　要：为了解沧州冬、春季PM10污染特征及其影响因素,于2010年12月~2011年5月采用TEOM1400a对沧州环境空气中ρ（PM10）进行连续在线观测,分析了ρ（PM10）主要特征,比较了冬、春季ρ（PM10）与风速、气压、温度及相对湿度等气象因素之间的关系,并运用HYSPLIT v4.9模式,分析了冬、春季不同气团轨迹特征。结果表明：沧州颗粒物污染比较严重,ρ（PM10）为171.3±104.6μg·m-3,高于国家空气质量二级标准日均质量浓度限值（150μg·m-3）约14%;ρ（PM10）冬季高于春季,双休日高于工作日;冬、春季、双休日和工作日ρ（PM10）日变化曲线均为双峰型;平均风速、气压和温度是影响ρ（PM10）的主要气象因素,冬季ρ（PM10）与风速呈负相关,而春季呈正相关,冬、春季ρ（PM10）与气压均为负相关,与温度均为正相关;后向轨迹聚类分析显示,西北偏北气流表现为对颗粒物的清除作用,南部气流和西北气流输送是造成颗粒物浓度升高的主要原因。In order to understand the pollution characteristics and influencing factors of PM10 mass concentration in winter and spring at Cangzhou, the mass concentration of PM10 was continuously measured by TEOM1400a during the period from December 2010 to May 2011. Based on average daily PM10 mass concentration and meteorological data at Cangzhou, the variation characteristics of PM10 mass concentration was analyzed. The relationships between PM10 mass concentration and wind speed, air pressure, temperature and relative humid in winter and spring were compared and discussed. The characteristics of air mass trajectories in winter and spring were analyzed by means of HYSPLIT v4.9 mode. The results showed that the particulate pollution at Cangzhou was se- rious and the average PM10 mass concentration （171.3± 104.6μg · m^-3） was about 14% higher than the National Ambient Air Quality Standard Ⅱ （ 150μg · m^-3 ）. The average PM10 mass concentration in winter was higher than that in spring and the concentration on weekends was higher than that on weekdays during winter and spring. The diurnal variations of PM10 mass concentration were similar in winter and spring and on weekends and weekdays, which showed a morning peak in 8：00 and an evening peak in 20：00 except the morning peak in 9 ： 00 on weekends. The relationship between PM10 mass concentration and meteorological factors showed that wind speed, air pressure, and temperature were major factors that influenced the variation of PM10 mass concentration. The mass concentration of PM10 and wind speed had negative correlation in winter , but had positive correlation in spring. The mass concentration of PM10 was negatively correlated with air pressure, but positively correlated with temperature in winter and spring. The cluster analysis of backward trajectories showed that the NNW air flow could wash away atmospheric particulate matter, while the transport of south and northwest air flow could lead to contamination of particulate matter.

关 键 词：沧州 污染特征 PM 10 后向轨迹 气象因素 

分 类 号：X51[环境科学与工程—环境工程]