气象科学2017，Vol.37Issue(1)：78-85,8.DOI:10.3969/2015jms.0077
合肥市PM2.5对城市辐射和气温的影响
Effects of PM2.5 on the urban radiation and air temperature in Hefei
摘要
Abstract
Based on the global radiation data,air temperature data,ground temperature data,relative humidity data and PM2.5 concentration data from February 2013 to March 2014 in Hefei of Anhui province,the relationship among PM2.5 concentration,global radiation,air temperature,ground temperature was analyzed.Results show that (1) The concentration of PM2.5 is an important human factor to affect the global radiation in urban area.In the midday of cloud-free conditions,the global radiation and PM2.5 concentration presented strong negative correlation,the correlation coefficient reaches-0.62.The correlation coefficient between normalized global radiation and PM2.5 is-0.76,which is small in the morning and evening.On the average,when PM2.5 concentration increases by 1 μg· m-3,the global radiation declines by 0.92 W· m-2 in the daytime of the cloud-free conditions.(2) In the daytime of the cloud-free conditions,air temperature,ground temperature and PM2.5 concentration have obvious negative correlation.The effect of PM2.5 concentration on the ground temperature is greater than that on air temperature.The effects in summer is greater than those in other seasons.The average slopes of linear fitting line between air temperature,ground temperature and PM2.5 concentration are-0.12 and-0.022,respectively.It is also found that when PM2.5 concentration increases by 10 μg· m-3,ground temperature and air temperature on the average,fall 0.22 ℃ and 1.2 ℃,respectively.(3) On the weather scale,PM2.5 concentration has obvious influences on global radiation,ground temperature and air temperature.In September and December,1 μg· m-3 of PM2.5 concentration increasing would cause the global radiation decline by 1.8 W·m-2 and 0.5 W· m-2,ground temperature drop 0.11 ℃ and 0.02 ℃,the air temperature drop 0.03 ℃ and 0.01 ℃.The air-pollution condition should be considered in weather forecasting.关键词
PM2.5/总辐射/气温/地面温度Key words
PM2.5/Global radiation/Air temperature/Ground temperature分类
资源环境引用本文复制引用
胡森林,刘红年..合肥市PM2.5对城市辐射和气温的影响[J].气象科学,2017,37(1):78-85,8.基金项目
国家重点基础研究发展规划(973计划)项目(2014CB441203) （973计划）
国家自然科学基金资助项目(41575141) （41575141）
