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广州市污染天气类型与化学组分特征分析

Polluted Weather Types and Characteristic Analysis of Chemical Components in Guangzhou
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摘要 广州市作为珠三角中部核心城市之一,为进一步了解天气形势对其污染天气象要素和化学组分特征的影响,基于2020年4月~2021年3月的观测资料,采用主观分型方法对其进行污染天气分型。结果表明:广州市污染天主要表现为均压、风速小的静稳天气,发生臭氧污染时一般太阳辐射较强,温度较高;而发生二氧化氮和颗粒物污染时则温度较低,风速较小。期间广州市出现污染天的气压场类型主要包括热带气旋型、入海变性高压型、高压底部型、槽脊对峙型。高压底部型和槽脊对峙型气压场中轻微污染天在总污染天数中占比最高(均为50%)。 Guangzhou is one of the core cities in the central PRD.The influence of weather types on meteorological elements and chemical component characteristics in Guangzhou in pollution episodes needs to be further understood.Based on the observation data from April 2020 to March 2021,a subjective typing method is used to carry out the polluted weather typing for Guangzhou.The polluted days in Guangzhou are mainly stagnant weather with mean pressure and low wind speed.Ozone pollution occurs with generally strong solar radiation and high temperature,while nitrogen dioxide and particulate matter pollution occur with lower temperature and wind speed.The tropical cyclone type,the incoming variable high-pressure type,the high-pressure bottom type,and the trough-ridge confrontation type were the main types of pressure fields in Guangzhou during the observation period.The highest percentage of lightly polluted days to total polluted days(50%)was found in the high-pressure bottom and trough-ridge confrontation types.
作者 陈彦宁 梁永健 裴成磊 高健 CHEN Yan-ning;LIANG Yong-jian;PEI Cheng-lei;GAO Jian(Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center,Guangzhou 510006,China;Guangdong Research Station for Field Scientific Observation of Climate Environment and Air Quality Changes around Pearl River Estuary,Guangzhou 510275,China;Chinese Research Academy of Environmental Sciences,Beijing 100012,China)
出处 《环境科技》 2022年第6期45-50,共6页 Environmental Science and Technology
基金 广东省科技计划项目(科技创新平台类)(2019B121201-002) 广州市科技计划项目(202002020065).
关键词 主观天气分型 光化学污染 化学组分 广州 Subjective weather typing Photochemical pollution Chemical fraction Guangzhou
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