气候变化领域集成服务门户(CCPortal): Characteristics of aerosol chemical components and their impacts on direct radiative forcing at urban and suburban locations in Southeast Texas

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DOI	10.1016/j.atmosenv.2020.118151
	Characteristics of aerosol chemical components and their impacts on direct radiative forcing at urban and suburban locations in Southeast Texas
	Song S.-K.; Choi Y.-N.; Choi Y.; Flynn J.; Sadeghi B.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	The monthly/seasonal characteristics of the concentration and aerosol optical depth (AOD) of four aerosol components (water-soluble, insoluble, black carbon (BC), and sea-salt) and their direct radiative forcing (DRF) were investigated at three environmental locations in Southeast Texas. We used fine particulate matter (PM2.5) samples measured at one urban residential (Aldine (AD)) and two suburban (Deer Park (DP) and West Liberty (WL)) sites located around Houston during 2016–2017, and performed model-based analysis using the mass concentrations of the four aerosol components to evaluate their impact on the DRF. Overall, the concentrations, AODs, and DRFs of all four aerosol components at AD were higher than those at DP and WL during the study period. In particular, the water-soluble component was the most dominant contributor, except for absorbing BC. The monthly AOD patterns of the four individual aerosol components (especially, water-soluble and BC) at the three sites were found to have strong associations with their concentrations and/or relative humidity (RH). The DRFs at the top of the atmosphere (DRFTOA) and surface level (DRFSFC) for most of the aerosol components were found to be highest in winter 2017 (AD), spring 2016 and winter 2017 (DP), and winter 2016 and fall 2017 (WL). The exceptions were sea-salt and insoluble components, which showed a peak in summer 2016 and no distinct monthly variation, respectively. Uncertainties in the DRFs of the four target aerosol components calculated using in-situ RH measurements were found to be less than 20%, with the exception of the water-soluble component at WL (24%). A sensitivity test showed that the DRFs of the aerosol components were slightly and significantly influenced by changes in AOD and single scattering albedo, respectively; additionally, sensitively changed with RH. © 2020
关键词	Black carbon Direct radiative forcing Relative humidity Southeast Texas Urban and suburban sites Water-soluble component
语种	英语
scopus关键词	Atmospheric radiation; Uncertainty analysis; Urban growth; Aerosol chemical components; Aerosol optical depths; Direct radiative forcing; Fine particulate matter (PM2.5); Model-based analysis; Single scattering albedo; Top of the atmospheres; Water soluble components; Aerosols; black carbon; sodium chloride; aerosol; black carbon; chemical composition; concentration (composition); optical depth; particulate matter; radiative forcing; relative humidity; seasonal variation; spatiotemporal analysis; suburban area; aerosol; Article; atmosphere; chemical composition; chemical interaction; environmental factor; humidity; meteorology; optical depth; particulate matter 2.5; priority journal; radiative forcing; seasonal variation; sensitivity analysis; spring; suburban area; summer; Texas; winter; Houston; Texas; United States
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248658
作者单位	Department of Earth and Marine Sciences, Jeju National University, Jeju, 63243, South Korea; Global Environment System Research Division, National Institute of Meteorological SciencesJeju-do 63568, South Korea; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204, United States
推荐引用方式 GB/T 7714	Song S.-K.,Choi Y.-N.,Choi Y.,et al. Characteristics of aerosol chemical components and their impacts on direct radiative forcing at urban and suburban locations in Southeast Texas[J],2021,246.
APA	Song S.-K.,Choi Y.-N.,Choi Y.,Flynn J.,&Sadeghi B..(2021).Characteristics of aerosol chemical components and their impacts on direct radiative forcing at urban and suburban locations in Southeast Texas.ATMOSPHERIC ENVIRONMENT,246.
MLA	Song S.-K.,et al."Characteristics of aerosol chemical components and their impacts on direct radiative forcing at urban and suburban locations in Southeast Texas".ATMOSPHERIC ENVIRONMENT 246(2021).