气候变化领域集成服务门户(CCPortal): Characterizing Weekly Cycles of Particulate Matter in a Coastal Megacity: The Importance of a Seasonal, Size-Resolved, and Chemically Speciated Analysis

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DOI	10.1029/2020JD032614
	Characterizing Weekly Cycles of Particulate Matter in a Coastal Megacity: The Importance of a Seasonal, Size-Resolved, and Chemically Speciated Analysis
	Hilario M.R.A.; Cruz M.T.; Bañaga P.A.; Betito G.; Braun R.A.; Stahl C.; Cambaliza M.O.; Lorenzo G.R.; MacDonald A.B.; AzadiAghdam M.; Pabroa P.C.; Yee J.R.; Simpas J.B.; Sorooshian A.
发表日期	2020
ISSN	2169897X
卷号	125 期号:13
英文摘要	We present the first study of the weekly cycles (WCs) of chemically speciated and size-resolved particulate matter (PM) in Metro Manila, Philippines, a coastal megacity located within a highly complex meteorological environment that is subject to both anthropogenic and natural sources. To measure PM, Micro-Orifice Uniform Deposit Impactors (MOUDIs) were deployed in Metro Manila from August 2018 to October 2019 and samples were analyzed for ionic and elemental species, including black carbon (BC). The WC in Metro Manila varied remarkably across seasons, linked to shifts in meteorology, transport, and aerosol source. Identified aerosol sources were traffic, local and regional burning, dust, sea salt, and secondary aerosol formation. Direct emissions induced a late workweek peak, while secondary aerosol formation led to a weekend peak in response to precursor buildup mainly from traffic. Seasonal analysis revealed that local burning from solid waste management and agricultural fires induced a strong WC peak while regional burning emissions from the Maritime Continent (MC) and possibly the Asian continent elevated seasonal baseline concentrations of the WC. BC showed a seasonally persistent WC, consistent in magnitude, weekly peak timing, and particle size. The dominant submicrometer WC and the contribution of BC across seasons have important ramifications on public health and policymaking, which are also discussed. As many of the observed WC patterns are undetectable when using only bulk PM, this study demonstrates that a seasonal, size-resolved, and chemically speciated characterization is required to more fully understand the driving mechanisms governing WCs. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	biomass burning; CAMP2EX; manila; particulate matter; urban emissions; weekly cycle
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185924
作者单位	Manila Observatory, Quezon City, Philippines; Institute of Environmental Science and Meteorology, University of the Philippines Diliman, Quezon City, Philippines; Department of Physics, Ateneo de Manila University, Quezon City, Philippines; Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, United States; Now at Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Philippine Nuclear Research Institute, Department of Science and Technology, Commonwealth Avenue, Quezon City, Philippines; Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States
推荐引用方式 GB/T 7714	Hilario M.R.A.,Cruz M.T.,Bañaga P.A.,et al. Characterizing Weekly Cycles of Particulate Matter in a Coastal Megacity: The Importance of a Seasonal, Size-Resolved, and Chemically Speciated Analysis[J],2020,125(13).
APA	Hilario M.R.A..,Cruz M.T..,Bañaga P.A..,Betito G..,Braun R.A..,...&Sorooshian A..(2020).Characterizing Weekly Cycles of Particulate Matter in a Coastal Megacity: The Importance of a Seasonal, Size-Resolved, and Chemically Speciated Analysis.Journal of Geophysical Research: Atmospheres,125(13).
MLA	Hilario M.R.A.,et al."Characterizing Weekly Cycles of Particulate Matter in a Coastal Megacity: The Importance of a Seasonal, Size-Resolved, and Chemically Speciated Analysis".Journal of Geophysical Research: Atmospheres 125.13(2020).