南京市近十年降尘趋势分析

Trend Analysis of Nanjing Dust for Nearly a Decade

基于南京市积累的近十年降尘监测数据,按年度、季度和月度分析降尘的时间趋势变化,结果为全市降尘总体呈显著下降趋势,城区降尘污染明显高于郊区县;全市降尘量季度分布是春季>夏季>秋季>冬季,且存在显著性差异;在春季的4月降尘量达到最高。按行政区、功能区分析降尘的空间分布变化,结果为各降尘功能区以交通区污染最重,道路尘、建筑尘和机动车尾气尘是城市环境管理的重点。

Based on Nanjing-accumulation of dust monitoring data from the past 10 years,analysis of annual,quarterly and monthly time trend of changes in dust.The results for the city＇s dust was a significant downward trend in general,urban dust pollution,much higher than suburban counties.The city is the distribution of dust in the spring quarter,the amount of ＂summer＂ ＂autumn＂ in winter,and there was a significant difference,In the spring of April reached the highest dust.According to administrative,functional area analysis of the spatial distribution of dust changes,the results for all functional areas to dust pollution in the heaviest traffic,road dust,construction dust and vehicle exhaust dust is the focus of urban environmental management.