摘要
以2014—2017年信阳城区逐日气象要素(最高气温、最低气温、均温和降水量)和环境空气自动监测系统逐日数据(SO_2,NO_2,PM_(10),PM_(2.5),CO,O_3污染物浓度和AQI)为研究对象,采用统计分析和Pearson相关系数法,分析气温和降水量与主要污染物之间关系.结果表明:(1)2014—2017年信阳城区空气质量以优良为主,重度、严重污染的日数较少.(2)日气温(最低、平均和最高)和日降水量与主要污染物SO_2,NO_2,PM_(10),PM_(2.5),CO浓度和AQI呈显著的负相关,与O_3呈显著的正相关,说明气温愈高、降水量愈多,空气质量愈好,即夏季空气质量优于冬季.通过统计2014—2017年逐日空气质量,四季空气质量从夏季、秋季、春季和冬季依次由好转差.(3)相较于非雨日,雨日主要污染物浓度明显降低;降水过程中或者降水之后,大气主要污染物浓度显著下降,共同说明降水量对主要污染物具有显著淋洗作用,尤其是颗粒物PM_(10)和PM_(2.5).
The daily meteoMogical elements （maximum temperature, minimum temperature, average temperature, and precipitation）, and the daily air quality data （S02, NO2, PMI0, PM2.5, CO, 03 pollutant concentrations and AQI） in Xinyang urban area from 2014 to 2017 were selected. We used the statistical analysis and Pearson con＇elation coefficient method to analyze the relationship between temperature and precipitation indicators and major pollutants. The results showed as follows. ①The air quality in Xinyang city was mainly excellent from 2014 to 2017, and the number of heavy and serious pollution clays was few. ②The daily temperature （minimum, average and maximum） and daily precipitation had significant negative con＇elation with main pollutants SO2, NO2, PMI0, PM2.5, CO concentration and AQI, which showed significant positive correlation with 03, indicating that the higher the temperature, the more precipitation and the better the air quality, that is, the better air quality in summer than winter. Through the statistics of daily air quality from 2014 to 2017, it was found that the air quality of the four seasons air quality from good to poor in turn. Summer, autumn, spring and winter. ③Compared with non-rainy days, the concentration of major pollutants on rainy clays decreased significantly. During the precipitation process or after precipitation, the concentration of major pollutants in the atmosphere decreased significantly, indicating that precipitation has significant leaching effect on major pollutants, especially the particulate matters PM10 and PM2.5.
作者
刘明华
韩艳
姜文娟
张宇
徐畅
LIU Minghua;HAN Yan;JIANG Wenjuan;ZHANG Yu;XU Chang(School of Geographic Sciences,Xinyang Normal University,Xinyang 464000,Henan China)
出处
《河南科学》
2018年第11期1745-1751,共7页
Henan Science
基金
河南省重点研发与推广专项项目(182102311036
162102310123)
河南省高等学校重点科研项目(17A170011)
关键词
气温
降水
污染物
信阳
temperature
precipitation
pollutants
Xinyang
