摘要
利用宁波地区2015—2021年夏半年(4—10月)臭氧监测数据、地面气象观测数据,分析宁波地区夏半年臭氧超标天气及气象要素特征。结合同期海平面气压场进行大气环流形势分型,归纳总结了宁波地区高浓度臭氧出现的天气形势。结果表明,宁波地区臭氧污染高发的月份是4,5,9月,近地面臭氧浓度的变化与气温、湿度、降水、日照和风速等密切相关,高浓度臭氧污染是多因子综合作用的结果。通过普查历史天气图,归纳了伴随宁波地区高浓度臭氧事件出现的6种主要天气形势,4,5月主要是高压中心型、高压底部型和高压后部型;8月台风影响增多,台风型日数明显增加;9月天气形势较为静稳,臭氧污染多发生在均压场型和低压型。总的来看,所有臭氧污染高发天气形势中,以均压场型出现概率最大,占比为38.2%,对应臭氧浓度最高,平均为192μg•m^(-3)。
Based on Ningbo ozone monitoring data and surface meteorological observation data in summer half year of 2015—2021(from April to October),characteristics of Ningbo weather and meteorological elements with over ozone standard in summer half year were analyzed.Combined with sea level pressure field of the same period,the atmospheric circulation situation is classified to sum up the weather situation of high concentration ozone in Ningbo.The result shows that months with high incidence of ozone pollution in Ningbo appear in April,May and September.The change of near-ground ozone concentration is closely related to temperature,humidity,precipitation,sunshine and wind speed.High concentration of ozone pollution is the consequence of multiple factors.Through the general investigation into historical weather maps,six main weather situations concurrent with the high concentration ozone cases in Ningbo are summarized.In April and May,it is mainly high pressure center type,high pressure bottom type and high pressure rear type.In August,it is more affected by typhoon.Days of typhoon type significantly increased.In September,weather situation is static and stable relatively.Ozone pollution mostly occurs in uniform pressure field and low pressure type.Overall,in all six weather situations,uniform pressure field has the most probability of high incidence of ozone pollution,accounting for 38.2%,with highest ozone concentration and an average of 192μg•m^(-3).
作者
胡晓
徐璐
郑艳
张国超
HU Xiao;XU Lu;ZHENG Yan;ZHANG Guochao(Meteorological Bureau of Zhenhai District,Ningbo 315202,Zhejiang,China)
出处
《亚热带资源与环境学报》
2024年第2期54-60,共7页
Journal of Subtropical Resources and Environment
基金
宁波市自然科学基金一般项目(2023J235)
宁波市气象科技计划项目(NBQX2022006B)。
关键词
臭氧污染
气象要素
天气分型
宁波
O_(3)pollution
meteorological factors
synoptic weather classification
Ningbo
