武汉市PM_(2.5)的时空差异分析研究

Temporal and Spatial analysis of PM_(2.5) in Wuhan City

通过对武汉市PM_(2.5)监测数据和气象要素资料的分析,描述了武汉市PM_(2.5)的地域分布情况,并对其时间、空间差异及气象因素影响进行探讨。结果表明:武汉市PM_(2.5)污染状况出现逐年减轻的良好势头;冬季污染最严重,春秋次之,夏季较轻;月平均浓度起伏较大,整体呈现"U"形,7月份浓度最低,这与季节性分布保持一致;新城区年均值相对小于中心城区;PM_(2.5)浓度与降水量和气温都呈负相关,而与日照时间没有显著的相关性。

Based on the analysis of PM 2.5 monitoring data and meteorological elements data in Wuhan, this paper describes the regional distribution of PM 2.5 in Wuhan, and discusses its temporal and spatial differences and the impact of meteorological factors. The results show that the pollution status of PM 2.5 in Wuhan has been decreasing year by year;the pollution in winter is the most serious, followed by spring and autumn, and in summer is lighter;the monthly average concentration fluctuations are larger, showing the overall shape of “U”, and the lowest concentration is in July, this is consistent with seasonal distribution;the new city is relatively smaller than the average value of the city center;PM 2.5 concentration and precipitation and temperature were negatively correlated, but not significantly correlated with sunshine time.