摘要
利用武汉城市圈20152017年9个城市环境国控站点和气象监测站点数据,对城市圈臭氧(O_(3))特征和影响因素进行了统计分析。结果表明:20152017年城市圈O_(3)浓度呈下降趋势,O_(3)浓度最高的是黄冈、咸宁和鄂州,其次是武汉和孝感;49月为城市圈O_(3)浓度的高值时段。2015年武汉市O_(3)浓度超标日为2017年的两倍,且O_(3)作为首要污染物的占比为25%~30%。O_(3)浓度与气温、日照、辐射和能见度呈正相关关系,且与气温和日照的相关性最好;与相对湿度和气压呈负相关关系;而与风速的关系不明显。14:00和15:00的气温为29~33℃、相对湿度为30%~60%、日平均总辐射达到1.5~2.0 MJ/m^(2)、日总日照时数为10~12 h时,O_(3)浓度最高。偏南至偏西风时O_(3)浓度值较高,且最高浓度出现在风向260°左右。武汉市59月O_(3)浓度超标日颗粒物浓度较高,高浓度的O_(3)会加剧化学反应促进二次颗粒物的生成。
Based on the contaminated and meteorological data from nine urban environment stations and meteorological stations in Wuhan metropolitan area from 2015 to 2017,this paper analyzes the characteristics of ozone(O_(3))pollution and its impact factors.The results show that there was a decreasing trend of O_(3) pollution from 2015 to 2017.The O_(3) concentration was highest in Huanggang,Xianning and Ezhou,followed by that in Wuhan and Xiaogan.The high O_(3) concentrations appeared from April to September.The total O_(3) pollution days in 2015 were twice as much as those in 2017,and O_(3),as a major pollutant,accounted for 25%—30%.O_(3) concentration was positively correlated with temperature,sunlight,radiation and visibility,of which its corrections to temperature and sunlight were the best.However,it was negatively correlated with humidity and air pressure,and its correlation with wind speed was the worst.When the temperature in 14:00—15:00 was 29—33℃,relative humidity was 30%—60%,daily average radiation was 1.5—2.0 MJ/m^(2) and daily sunshine lasted for 10—12 h,the O_(3) concentration value was the highest.When wind blew from South to West,the O_(3) concentration value reached its peak in the wind direction of 260°.The other particle concentration was higher from May to September,and the higher O_(3) concentration could intensify the formation of secondary particles.
作者
岳岩裕
吴翠红
许可
管振宇
周悦
Yue Yanyu;Wu Cuihong;Xu Ke;Guan Zhenyu;Zhou Yue(Jinsha National Atmospheric Background Station,Wuhan 430074,China;Wuhan Regional Climate Center,Wuhan 430074,China;Wuhan Central Meteorological Observatory,Wuhan 430074,China;Hubei Environment Monitoring Center,Wuhan 430072,China)
出处
《气象与环境科学》
2021年第3期16-23,共8页
Meteorological and Environmental Sciences
基金
国家重点研发计划(2017YFC0212604)
湖北省气象局研究型业务发展专项(2019YJ06)
湖北省气象局科技基金项目(2019Z02,2019Q06,2021Z05)。
关键词
武汉城市圈
臭氧
气象因子
时空分布
Wuhan metropolitan area
ozone
meteorological factor
temporal and spatial distribution
