基于呼和浩特市臭氧污染特点的气象条件与天气分型研究  

Study on Meteorological Conditions and Weather Classification Based on Ozone Pollution Characteristics in H ohhot

作　　者：王俊秀 韩仙桃 兰劲青 杨彩云 王俊杰 刘晓敏 Wang Junxiu;Han Xiantao;Lan Jingqing;Yang Caiyun;Wang Junjie;Liu Xiaomin(Hohhot Meteorological Bureau,Inner Mongolia Hohhot 010020;Inner Mongolia Autonomous Region Academy of Eco-Environmental Sciences,Inner Mongolia Hohhot 010011;Suining Meteorology Bureau,Sichuan Suining 629000)

机构地区：[1]呼和浩特市气象局,内蒙古呼和浩特010020 [2]内蒙古自治区生态环境科学研究院,内蒙古呼和浩特010011 [3]遂宁市气象局,四川遂宁629000

出　　处：《内蒙古气象》2023年第6期19-24,共6页Meteorology Journal of Inner Mongolia

摘　　要：文章利用2017—2021年呼和浩特市区近地面臭氧(O_(3))和气象观测资料,研究气象条件对O_(3)污染的影响,对不同的O_(3)污染日进行天气分型。结果表明:(1)呼和浩特市ρ(O_(3)—8 h)月变化为夏季高冬季低。O_(3)超标情况主要集中在5—8月,其中6—7月为全年最多。O_(3)日变化呈单峰型,最大值出现在15:00,为122~140μg·m^(-3)。(2)日最高气温与O_(3)浓度相关系数为0.72,随着气温升高O_(3)超标率呈指数上升;相对湿度与O_(3)浓度呈负相关,相对湿度为30%~40%时,O_(3)超标率最高,当相对湿度大于60%时无超标现象;1.0 m·s^(-1)<风速≤2.0 m·s^(-1)时O_(3)浓度超标率最高,当风速>5.0 m·s^(-1)时无O_(3)浓度超标现象,O_(3)浓度超标出现在风向为SSE—S—W—NW时。(3)O_(3)日评价达轻度污染及以上的日数为111 d,槽脊型51 d(46%)、宽广低槽型28 d(25%)、副热带高压型12 d(11%)、东北高脊型16 d(14%),其他型3 d。Based on the near-surface ozone(O_(3))and meteorological observation data in Hohhot from 2017 to 2021,the influence of meteorological conditions on O_(3) pollution was studied,and weather classification of different O_(3) pollution days were conducted.The results showed that:(1)The monthlyρ(O_(3)-8 h)of Hohhot was high in summer and low in winter.The phenomenon of O_(3)exceeding the standard occurred mainly in May to August,especially in June and July.The diurnal variation of O_(3) followed unimodal distribution,with a maximum of 122—140μg·m^(-3)at 15:00.(2)The correlation coefficient between daily maximum temperature and O_(3) concentration was 0.72,and the O_(3) over-standard rate increased exponentially with the increase of temperature.The relative humidity was negatively correlated with O_(3) concentration.When the relative humidity was 30—40%,the O_(3) over-standard rate was the highest,and there was no over-standard phenomenon when the relative humidity was greater than 60%.When the wind speed(WS)was 1.0 m·s^(-1)5 m·s^(-1),there was no O_(3) pollution.In the meanwhile,O_(3) pollution usually occurred when the wind direction was SSE—S—W—NW.(3)The number of days with moderate pollution or above was 111 days,including 51 days(46%)of trough ridge type,28 days(25%)of broad low trough type,12 days(11%)of subtropical high type,16 days(14%)of Northeast high ridge type,and 3 days of other types.

关 键 词：O_(3) 气象条件 天气分型 呼和浩特 

分 类 号：X515[环境科学与工程—环境工程]