武汉市军运会期间空气质量特征及气象条件分析  

Analysis on the Characteristics of Air Quality and Meteorological Conditions During the 7th CISM Military World Games

作　　者：岳岩裕[1,2] 沈龙娇 周悦 柳草[4] 张灵[1] 范进进[5] YUE Yanyu;SHEN Longjiao;ZHOU Yue;LIU Cao;ZHANG Ling;FAN Jinjin(Wuhan Regional Climate Center,Wuhan 430074;Institute of Heavy Rain,CMA,Wuhan 430205;Wuhan Environmental Monitoring Center,Wuhan 430015;Wuhan Central Meteorological Observatory,Wuhan 430074;Hubei Public Meteorological Service Center,Wuhan 430074)

机构地区：[1]武汉区域气候中心,武汉430074 [2]中国气象局武汉暴雨研究所,武汉430205 [3]武汉市环境监测中心站,武汉430015 [4]武汉中心气象台,武汉430074 [5]湖北省公众气象服务中心,武汉430074

出　　处：《气象》2022年第1期96-106,共11页Meteorological Monthly

基　　金：国家重点研发计划(2017YFC0212601);国家自然科学基金项目(41830965、41875170);湖北省气象局科技发展基金项目(2021Z05、2019Q06)共同资助。

摘　　要：利用2019年10月1—30日湖北省及邻近地区的空气质量、气象要素监测数据和再分析资料,分析了第七届世界军人运动会(以下简称军运会)期间和前后时段空气质量变化特征及气象条件的影响。军运会管控期Ⅱ(17—28日)与过去五年(2014—2018年)同期相比颗粒物浓度下降最明显,与长沙等其他城市相比也是最低,相近时间段或相似背景下未采取管控措施,PM_(2.5)浓度上升速度快,管控措施对颗粒物削峰降速作用明显。管控期O_(3)和NO_(2)为首要污染物,O_(3)浓度与过去五年相比升高,但管控仍起了一定作用,武汉城市圈O_(3)超标背景下武汉未达轻度污染级别;NO_(2)浓度同比下降,环比其他城市偏高。与管控期Ⅰ(13—16日)相比,管控期Ⅱ措施更严格,但降水偏少、风速偏小,气象条件整体不利于污染物浓度降低,因此浓度有所上升,其中17—21日以反气旋环流为主,天气形势静稳,光化学反应强烈,O_(3)和NO_(2)浓度上升明显。基于气象条件评估指数(EMI)分析发现,2019年10月与2013—2017年相比,EMI为正值,说明2019年的气象条件不利于PM_(2.5)浓度的降低,PM_(2.5)浓度下降主要是由减排造成的。Based on the observation data of air quality,meteorological elements,and reanalysis data,the evolution characteristics of air quality in Hubei Province and its adjacent areas from 1 to 30 October 2019,the impacts of meteorological conditions on the air quality during the 7th CISM Military World Games and before and after of this time are analyzed.The concentrations of PM_(2.5),PM 10 in control periodⅡ(from 17 to 28 October)were lower than the average concentrations in past five years and in other surrounding cities.Control measures were effective in decreasing concentration and restraining ascending velocity.O_(3) and NO_(2) were the primary pollutants in control periods(ⅠandⅡ)(from 13 to 16 October,and 17 to 28 October).Compared with the past five years,the concentration of O_(3) in Wuhan increased.However,under the background of excessive O_(3) in other nearby cities,pollution in Wuhan did not reach the polluted level,which indicates the control still took some effects.Actually,the concentration of NO_(2) was lower than normal years,but higher than that in other cities.Compared with control periodⅠ,precipitation was less and wind speed was small in control periodⅡ,thus the meteorological condition was not good for pollutant concentration to decrease.Anticyclonic circulation was dominant from 17 to 21 October,and sunlight and radiation was high with intense photochemical reaction,so concentrations of O_(3) and NO_(2) raised obviously.Based on evaluation on meteorological condition index(EMI),EMI was a positive value in 2019 compared with 2013-2017,which indicates that the meteorological conditions in 2019 were not conducive to the reduction of PM_(2.5),so emission reduction did the most significant contribution to the decreased concentration.

关 键 词：空气质量 气象条件 气象贡献 

分 类 号：X16[环境科学与工程—环境科学] P458[天文地球—大气科学及气象学]