气候变化领域集成服务门户(CCPortal): Long-range aerosol transport and impacts on size-resolved aerosol composition in Metro Manila, Philippines

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DOI	10.5194/acp-20-2387-2020
	Long-range aerosol transport and impacts on size-resolved aerosol composition in Metro Manila, Philippines
	Braun R.A.; Azadi Aghdam M.; Angela Bañaga P.; Betito G.; Obiminda Cambaliza M.; Templonuevo Cruz M.; Rose Lorenzo G.; MacDonald A.B.; Bernard Simpas J.; Stahl C.; Sorooshian A.
发表日期	2020
ISSN	1680-7316
起始页码	2387
结束页码	2405
卷号	20 期号:4
英文摘要	This study analyzes long-range transport of aerosol and aerosol chemical characteristics based on instances of high- and low-aerosol-loading events determined via ground-based size-resolved aerosol measurements collected at the Manila Observatory in Metro Manila, Philippines, from July to October 2018. Multiple data sources, including models, remote sensing, and in situ measurements, are used to analyze the impacts of long-range aerosol transport on Metro Manila and the conditions at the local and synoptic scales facilitating this transport. Through the use of case studies, evidence of long-range transport of biomass burning aerosol and continental emissions is identified in Metro Manila. Long-range transport of biomass burning aerosol from the Maritime Continent, bolstered by southwesterly flow and permitted by low rainfall, was identified through model results and the presence of biomass burning tracers (e.g., K, Rb) in the ground-based measurements. The impacts of emissions transported from continental East Asia on the aerosol characteristics in Metro Manila are also identified; for one of the events analyzed, this transport was facilitated by the nearby passage of a typhoon. Changes in the aerosol size distributions, water-soluble chemical composition, and contributions of various organic aerosol species to the total water-soluble organic aerosol were examined for the different cases. The events impacted by biomass burning transport had the overall highest concentration of water-soluble organic acids, while the events impacted by long-range transport from continental East Asia showed high percent contributions from shorter-chain dicarboxylic acids (i.e., oxalate) that are often representative of photochemical and aqueous processing in the atmosphere. The low-aerosol-loading event was subject to a larger precipitation accumulation than the high-aerosol events, indicative of wet scavenging as an aerosol sink in the study region. This low-aerosol event was characterized by a larger relative contribution from supermicrometer aerosols and had a higher percent contribution from longer-chain dicarboxylic acids (i.e., maleate) to the water-soluble organic aerosol fraction, indicating the importance of both primary aerosol emissions and local emissions. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; aerosol composition; atmospheric transport; biomass burning; chemical composition; concentration (composition); long range transport; urban atmosphere; National Capital Region; Philippines
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247951
作者单位	Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, United States; Manila Observatory, Loyola Heights, Quezon City, 1108, Philippines; Department of Physics, School of Science and Engineering, Ateneo de Manila University, Loyola Heights, Quezon City, 1108, Philippines; Institute of Environmental Science and Meteorology, University of the Philippines, Diliman, Quezon City, 1101, Philippines; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States
推荐引用方式 GB/T 7714	Braun R.A.,Azadi Aghdam M.,Angela Bañaga P.,et al. Long-range aerosol transport and impacts on size-resolved aerosol composition in Metro Manila, Philippines[J],2020,20(4).
APA	Braun R.A..,Azadi Aghdam M..,Angela Bañaga P..,Betito G..,Obiminda Cambaliza M..,...&Sorooshian A..(2020).Long-range aerosol transport and impacts on size-resolved aerosol composition in Metro Manila, Philippines.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(4).
MLA	Braun R.A.,et al."Long-range aerosol transport and impacts on size-resolved aerosol composition in Metro Manila, Philippines".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.4(2020).