An exploration of meteorological effects on PM_(2.5) air quality in several provinces and cities in Vietnam  

作　　者：Giang Tran Huong Nguyen Luan Thien La Huy Hoang-Cong Anh Hoang Le 

机构地区：[1]Faculty of Chemistry and Environment,Dalat University,Lam Dong Province,Vietnam [2]Environmental Protection Agency,Lam Dong Province Department of Natural Resources and Environment,Lam Dong Province,Vietnam [3]Northern Center for Environmental Monitoring,Environmental Pollution Control Department,Ha Noi City,Vietnam [4]Faculty of Environment,University of Science,Ho Chi Minh City,Vietnam [5]Vietnam National University,Ho Chi Minh City,Vietnam

出　　处：《Journal of Environmental Sciences》2024年第11期139-151,共13页环境科学学报（英文版）

摘　　要：Linking meteorology and air pollutants is a key challenge.The study investigated meteorological effects on PM_(2.5)concentration using the advanced convergent cross mapping method,utilizing hourly PM_(2.5)concentration and six meteorological factors across eight provinces and cities in Vietnam.Results demonstrated that temperature(ρ=0.30)and radiation(ρ=0.30)produced the highest effects,followed by humidity(ρ=0.28)and wind speed(ρ=0.24),while pressure(ρ=0.22)and wind direction(ρ=0.17)produced the weakest effects on PM_(2.5)concentration.Comparing theρvalues showed that temperature,wind speed,and wind direction had greater impacts on PM_(2.5)concentration during the dry season whereas radiation had a more influence during the wet season;Southern stations experienced larger meteorological effects.Temperature,humidity,pressure,and wind direction had both positive and negative influences on PM_(2.5)concentration,while radiation and wind speed mostly had negative influences.During PM_(2.5)pollution episodes,there wasmore contribution ofmeteorological effects on PM_(2.5)concentration indicated byρvalues.At contaminated levels,humidity(ρ=0.45)was the most dominant factor affecting PM_(2.5)concentration,followed by temperature(ρ=0.41)and radiation(ρ=0.40).Pollution episodes were pointed out to be more prevalent under higher humidity,higher pressure,lower temperature,lower radiation,and lower wind speed.Theρcalculation also revealed that lower temperature,lower radiation,and higher humidity greatly accelerated each other under pollution episodes,further enhancing PM_(2.5)concentration.The findings contributed to the literature on meteorology and air pollution interaction.

关 键 词：Fine particulate matter Air pollution Meteorological effect Convergent cross mapping Causality analysis VIETNAM 

分 类 号：X513[环境科学与工程—环境工程]