摘要
根据2015—2019年滁州市逐日空气质量指数(AQI)与对应的气象要素资料,运用统计方法和广义加性模型(GAM)分析AQI的时间变化特征及气象要素的影响效应。结果表明:近5年滁州市空气质量整体变化幅度较小,夏、秋季空气质量明显好于冬、春季,同时存在一定程度的周末效应;AQI整体上与日照时数显著正相关,与平均气温、平均相对湿度、平均风速、平均水汽压及降水量显著负相关,AQI在不同季节、不同空气质量指数类别下与气象要素的相关性存在较大的差别;各气象要素均在0.01水平下对AQI变化影响显著,气象要素对AQI变化的影响均表现为非线性关系,只有平均风速接近线性关系:在不同阈值范围内,气象要素对AQI变化的影响趋势和显著程度也存在明显的差异。
According to the daily air quality index(AQI)and the corresponding meteorological elements data of Chu⁃zhou from 2015 to 2019,the statistical method and generalized additive model(GAM)are used to analyze the time variation characteristics of AQI and the effect of meteorological elements.The results show that the overall change range of air quality in Chuzhou in the past five years is relatively small,and the air quality in summer and autumn is significantly better than that in winter and spring,and there is a certain range at the same time AQI has a significant positive correlation with sunshine hours,a significant negative correlation with average temperature,average relative humidity,average wind speed,average water vapor pressure and precipitation,and a significant difference between AQI and meteorological elements in different seasons and different air quality index categories.All meteorological el⁃ements are at 0.01 level The influence of meteorological factors on AQI changes is nonlinear,only the average wind speed is close to linear.In different threshold range,the influence trend and significance of meteorological factors on AQI changes are also significantly different.
作者
张鑫童
金华星
龚年祖
王刚
杜少栋
ZHANG Xintong(Chuzhou Meteorological Bureau,Chuzhou 239000,China)
出处
《安徽农学通报》
2020年第18期157-161,共5页
Anhui Agricultural Science Bulletin
