Daytime-nighttime variations in the concentration of PM_(0.1) carbonaceous particles during a biomass fire episode in Chiang Mai,Thailand  

作　　者：Worradorn Phairuang Thaneeya Chetiyanukornkul Phuchiwan Suriyawong Sotasing Ho Phakphum Paluang Masami Furuuchi Muhammand Amin Mitsuhiko Hata 

机构地区：[1]Faculty of Gesciences and CivilEngineering Institute of Science and Enginering,Kanazawa Univerity,Kanazawa,Ishkawa,92192,Japan [2]Department of Geography,Faculty of Social Sciences,Chiang Mai University,Muang,Chiang Mai 50200,Thailand [3]Department of Biology,Faculty of Science,Chiang Mai University,Muang,Chiang Mai,50200,Thailand [4]Research Unit for Eergyonomics and Eological Management Multidisciplinary Research Insttute,Chiang Mai University,Chiang Mai,50200,Thailand [5]Management and Development Training Program Office,National Institute of Science,Technology and Innovation,120601,Cambodia [6]Faculty of Engineering,Maritim University of Raja Ali Haj,Tanjung Pinang,Kepulauan Riau,29115,Indonesia

出　　处：《Particuology》2024年第4期316-324,共9页颗粒学报（英文版）

基　　金：supported by the Office of the Permanent Secretary,Ministry of Higher Education,Science,Research and Innovation,Thailand (Grant No.RGNS 63-253);Moreover,this research work was partially supported by JICA-JST SATREPS (Grant No.JPMJSA2102);JSPS KAKENHI 21H03618。

摘　　要：Carbonaceous aerosols affect air quality adversely,affect global warming,and human health.However,our understanding of the impact of ultrafine(PM_(0.1))carbonaceous particulate matter is incomplete,particularly the effects during haze episodes.This study monitored diurnal variations in PM_(0.1) in Chiang Mai,Thailand,from March to April 2020.We investigated carbonaceous PM_(0.1) collected by an ambient nano-sampler and evaluated their effect by using a carbon analyzer(IMPROVE_TOR).The results showed that burning large open areas in the dry season was crucial for increasing the particle mass concentration because of the large open burnings that occurred in this area.The majority of biomass fires near the sampling site occurred during the night,which would allow more particles to be released thus resulting in higher concentrations of PM_(0.1).Hence,the release of PM_(0.1) during the night would obviously result in higher concentrations than that during the day.In the eight carbon profiles,organic carbon 3(OC3)was predicted to be a marker of biomass fires.The carbon indices displayed that PM_(0.1) was influenced by biomass burning both daytime and nighttime.The findings reported herein should be of great impor-tance in terms of establishing biomass burning control policies for mitigating heavy haze pollution in Thailand and elsewhere.

关 键 词：Biomass burning Carbon Forest fires Nanoparticles Ultrafine particles 

分 类 号：X51[环境科学与工程—环境工程]