吐鲁番市颗粒物浓度变化特征及其与气象要素的关系

Characteristics of Particulate Matter Concentrations and Their Relationship with Meteorological Factors in Turpan

依据吐鲁番市2015年3月—2016年2月的PM_(10)、PM_(2.5)和气象资料,利用统计分析,探讨吐鲁番市PM_(10)和PM_(2.5)浓度的变化特征及其与气象要素的关系。结果表明:冬季PM2.5与PM10浓度的平均值最高(106 ug/m3、184 ug/m^3),春季次之(63 ug/m^3、163 ug/m^3),夏季最低(33 ug/m^3、95ug/m^3),且冬季二者浓度的平均值比夏季分别高大约69%、48%。11月至次年2月,每个月中PM_(2.5)和PM_(10)的污染程度在轻度污染以上的天数相比其它月份较多。PM_(10)与PM_(2.5)的日变化曲线特征呈现"双峰双谷"的特点;PM_(2.5)与PM_(10)的比值在冬季达到了60%~80%,这说明吐鲁番冬季主要以PM2.5污染为主;PM_(2.5)和PM_(10)与能见度之间存在极其显著的相关性,相关系数分别为-0.904、-0.792,与单一气象要素(如相对湿度、风速、温度等)的相关性不明显,但不同气象要素的共同作用对其有显著影响。

Based On PM10,PM2.5and meteorological data of Turpan city from March 2015 to February 2016,the relationship between particulate matter concentration of PM10and PM2.5in Turpan and meteorological factors were discussed by using statistical analysis.The results showed that the average concentrations of PM2.5and PM10in winter was the highest（106 ug/m^3,184 ug/m^3）,followed by spring（63 ug/m^3,163 ug/m^3）,the lowest in summer（33 ug/m^3,95 ug/m^3）.The average concentration of PM2.5and PM10in winter was about 69%and 48%higher than that in summer.From November to following February,the monthly numbers of light polluted day are more than other months.The diurnal variations shapes of particulates’concentrations display double-peak structure.The ratio of PM2.5to PM10reached 60%to 80%in winter which indicated that the main pollution is PM2.5in Turpan.There are significant relationship between particulate matter concentrations of PM2.5and PM10and visibility,and the correlation coefficients are-0.904 and-0.792 respectively.The correlation between particulate matter concentrations and single meteorological factor is not obvious.However,the integrated effects of many meteorological elements have significant role on them.