摘要
利用上海市郊金山环境监测站2007年春季的逐时PM10和气象参数的观测数据,分析了PM10日平均质量浓度和最大质量浓度的时间变化规律,小时平均质量浓度的分布规律,气象条件对PM10质量浓度的影响,并利用HYSPLIT轨迹模型结合气象观测数据对一次最严重的PM10污染过程进行了分析。结果表明,PM10在春季有11日出现超标,污染比较严重;风和降雨对PM10质量浓度均有较为明显的影响;4月2日监测点PM10日平均和最高质量浓度分别达到0.78 mg/m3和1.0 mg/m3,均为全年最高值,这与北方冷空气携带沙尘南下的影响有关。
Based on the PM10 values and meteorological data observed in the suburb of Shanghai during spring 2007, the temporal variation of daily averaged and maximum PM10 concentrations and distribution of the hourly averaged PM10 values were analyzed, as well as the meteorological effects on PM10. A severe PM10 episode case was studied using HYSPLIT trajectory model combined with surface meteorological data. There were 11 days with PM10 daily averaged concentrations exceeding the standard level observed, indicating serious pollution in spring. Wind and precipitation both have significant influence on PM10. Backward trajectory and meteorological analysis show that, due to the influence of cold air mass moving southward with dust, the daily averaged and maximum PM10 concentrations reached 0.78 mg/m^3 and 1.0 mg/m^3 respectively in the observational site, both were the highest values in the year.
出处
《环境监测管理与技术》
2009年第2期53-56,共4页
The Administration and Technique of Environmental Monitoring
