摘要
根据南京市2005年的PM10日均浓度和气象观测资料,利用Matlab小波分析工具,对PM10浓度的年时间序列进行分析,得出了该地区PM10日均浓度的变化规律:2—5月较大,6—9月较小,10—12月较大;并且全年共有5个突变点。结合HYSPLIT-4污染扩散模式,对污染源进行追踪,结果表明:造成南京市大气污染主要有局地污染物的排放和外来污染物的输送两种类型;在垂直方向上,污染物的长距离输送一直稳定在低层。
Based on average daily PM10 concentrations and meteorological data of Nanjing in 2005, we conclude the change rules of PM10 concentrations by using Matlab wavelet tool, which shows that PM10 concentrations are relatively higher from Feb. to May, from Oct. to Dec. and lower from Jun. to Sep. , and find five break points in 2005. Then we trace the source of pollutant by integrating the HYSPLIT-4 pollutant dispersion model. It indicates that emission of local pollutant and transportation of outer pollutant cause the atmospheric pollutant in Nanjing, as for the vertical direction, long-distance transportation of pollutant is always restricted to the bottom layer.
出处
《气象科学》
CSCD
北大核心
2009年第3期375-380,共6页
Journal of the Meteorological Sciences
基金
江苏省气象灾害重点实验室项目(KLME05017)
