摘要
基于2018—2022年湖北省17个城市68个站点的逐小时O_(3)观测资料,分析了O_(3)长期变化特征和空间分布特征.在此基础上,结合同期气象资料识别了湖北省臭氧不利气象区间,分析了气象条件变化对臭氧浓度的影响.结果表明:(1)长期趋势上,湖北省O_(3)-8 h年均浓度呈“N”型分布,2019年O_(3)-8 h年均浓度最高,为158μg·m^(-3),其次为2022年,为154μg·m^(-3).2022年臭氧污染天占比为48.3%,首次超过PM_(2.5)污染天占比45.9%.月变化上,臭氧呈“M”型分布,4—10月臭氧浓度相对较高.日变化上,不同季节下均呈“单峰”分布,一般15:00—16:00达到峰值.(2)空间分布上,湖北省呈现“东部>中部>西部”分布特征,且2022年中部地区臭氧污染加重.(3)当日均气温[28℃,32℃)、日最高气温[30℃,35℃)、日均相对湿度[50%,60%)、日最低相对湿度[30%,40%)、日均风速[2 m·s^(-1),3 m·s^(-1))、风向为偏南风时,湖北省易发生臭氧污染.黄石、黄冈、天门、潜江等城市易受到武汉污染传输影响,应加强城际间的联防联控.(4)2022年处于臭氧不利气象区间的天数占比为近5年最高,说明不利气象条件是2022年臭氧浓度显著上升的重要原因.
Based on the hourly observation data of O_(3) from 68 stations in 17 cities in Hubei Province from 2018 to 2022,this paper analyzes the longterm trend and spatial distribution characteristics of O_(3).The unfavorable meteorological range for ozone was identified and the influence of meteorological conditions on ozone concentration was analyzed by combining meteorological data in the same period.The results show that:①In the long-term trend,the annual average concentration of O_(3)-8 h in Hubei Province shows an"N"type distribution.The highest annual average concentration of O_(3)-8 h was in 2019,reaching 158μg·m^(-3),followed by 2022,reaching 154μg·m^(-3).In 2022,the proportion of ozone pollution days exceeded the proportion of PM_(2.5) pollution days for the first time,reaching 48.3%and 45.9%respectively.In terms of monthly variations,O_(3)-8 h concentration shows an"M"type distribution,and the O_(3)-8 h concentration is relatively high from April to October.In terms of daily variations,it shows a"single peak"distribution in different seasons,generally reaching a peak at 15:00—16:00.②In terms of spatial distribution,Hubei Province shows a distribution characteristic of higher ozone concentration in the east than in the middle,and higher in the middle than in the west.In 2022,ozone pollution in the central region worsened.③When the daily average temperature is[28℃,32℃),the daily maximum temperature is[30℃,35℃),the daily relative humidity is[50%,60%),the daily minimum relative humidity is[30%,40%),the daily average wind speed is[2 m·s^(-1),3 m·s^(-1)),and the wind direction is southeast,ozone pollution is prone to occur in Hubei Province.Citys such as Huangshi,Huanggang,Tianmen,Qianjiang,etc.,are easily affected by pollution transmission from Wuhan,and should strengthen inter-city joint prevention and control.④The proportion of days in the unfavorable meteorological range for ozone in 2022 was the highest in the past five years,indicating that unfavorable meteorological conditions were an i
作者
吴倩
刘丹
朱宽广
周亚端
刘巍
王盼
丁峰
WU Qian;LIU Dan;ZHU Kuanguang;ZHOU Yaduan;LIU Wei;WANG Pan;DING Feng(Huazhong University of Science and Technology,Wuhan 430074;Hubei Provincial Academy of Eco-environmental Sciences,Wuhan 430070)
出处
《环境科学学报》
CAS
CSCD
北大核心
2024年第10期42-51,共10页
Acta Scientiae Circumstantiae
基金
武汉曙光计划项目(No.2023020201020452,2022020801020387)
湖北省生态环境厅2023年省级环保科研项目(No.2023ZHB-08)。
关键词
湖北
臭氧污染
气象因子
Hubei
ozone pollution
meteorological factors
