دورية أكاديمية
أعرض في EDS

Contrasting compositions of PM 2.5 in Northern Thailand during La Niña (2017) and El Niño (2019) years.

التفاصيل البيبلوغرافية
العنوان: Contrasting compositions of PM 2.5 in Northern Thailand during La Niña (2017) and El Niño (2019) years.
المؤلفون: Kraisitnitikul P; Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand., Thepnuan D; Department of Chemistry, Faculty of Science and Technology, Chiang Mai Rajabhat University, Chiang Mai, 50300, Thailand. Electronic address: duangduean_the@cmru.ac.th., Chansuebsri S; Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand., Yabueng N; Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand., Wiriya W; Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Chemistry Department, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand., Saksakulkrai S; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK., Shi Z; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK., Chantara S; Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Chemistry Department, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand. Electronic address: somporn.chantara@cmu.ac.th.
المصدر: Journal of environmental sciences (China) [J Environ Sci (China)] 2024 Jan; Vol. 135, pp. 585-599. Date of Electronic Publication: 2022 Sep 27.
نوع المنشور: Comparative Study; Journal Article
اللغة: English
بيانات الدورية: Publisher: IOS Press Country of Publication: Netherlands NLM ID: 100967627 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1001-0742 (Print) Linking ISSN: 10010742 NLM ISO Abbreviation: J Environ Sci (China) Subsets: MEDLINE
أسماء مطبوعة: Publication: Amsterdam : IOS Press
Original Publication: Beijing : Editorial Dept. of Journal of Environmental Sciences (China), 1989-
مواضيع طبية MeSH: Air Pollutants*/analysis , El Nino-Southern Oscillation* , Environmental Monitoring* , Particulate Matter*/analysis, Aerosols/analysis ; Carbon/analysis ; China ; Seasons ; Smoke ; Soil ; Thailand
مستخلص: There have been a very limited number of systematic studies on PM 2.5 compositions and their source contribution in Southeast Asia. This study aims to explore the characteristics of PM 2.5 composition collected in Chiang Mai (Thailand) during La Niña and El Niño years and to apportion their sources during smoke haze and non-haze periods. The average PM 2.5 concentration of smoke haze episode in 2019 (El Niño) was much higher than in 2017 (La Niña). The ratios of organic carbon (OC) to elemental carbon (EC), as well as K (biomass burning (BB) tracer) to PM 2.5 , were higher during smoke haze episodes in 2019 than in 2017 indicating a significant influence from BB. The ratios of secondary organic carbon (SOC) levels to primary organic carbon (POC) levels during smoke haze episodes were higher than those in non-haze period, which indicated greater SOC contributions or more photo-oxidation of precursors in haze episodes with high ambient temperatures. However, the ratios of soil markers (Ca and Mg) during non-haze period were high implying that soil source contributed more to PM 2.5 concentrations when there less BB occurred. The positive Matrix Factorization (PMF) model revealed that the source of BB, characterized by high K fractions, was the largest contributor during smoke haze episodes accounting for 50% (2017) and 79% (2019). Climate conditions influence meteorological patterns, particularly during incidences of extreme weather such as droughts, which affect the scale and frequency of open burning and thus air pollution levels.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022. Published by Elsevier B.V.)
فهرسة مساهمة: Keywords: Air pollution; Biomass burning; Carbon; Climate; Metals; Source identification
المشرفين على المادة: 0 (Aerosols)
0 (Air Pollutants)
7440-44-0 (Carbon)
0 (Particulate Matter)
0 (Smoke)
0 (Soil)
تواريخ الأحداث: Date Created: 20231001 Date Completed: 20231004 Latest Revision: 20231004
رمز التحديث: 20231005
DOI: 10.1016/j.jes.2022.09.026
PMID: 37778829
قاعدة البيانات: MEDLINE
الوصف
تدمد:1001-0742
DOI:10.1016/j.jes.2022.09.026