气候变化领域集成服务门户(CCPortal): Spatial and Temporal Variability of Brown Carbon in the United States: Implications for Direct Radiative Effects

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DOI	10.1029/2020GL090332
	Spatial and Temporal Variability of Brown Carbon in the United States: Implications for Direct Radiative Effects
	June N.A.; Wang X.; Chen L.W.A.; Chow J.C.; Watson J.G.; Wang X.; Henderson B.H.; Zheng Y.; Mao J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	A newly developed data set from the Interagency Monitoring of PROtected Visual Environments (IMPROVE) observation network, combined with a 3-D chemical transport model, is used to evaluate the spatial and temporal variability of brown carbon (BrC) in the United States. The model with BrC emitted from biomass burning and biofuel emissions agrees with the seasonal and spatial variability of BrC planetary boundary layer (PBL) absorption aerosol optical depth (AAOD) observations within a factor of 2. The model without whitening, the tendency for absorption to decrease with aerosol aging, overestimates the observed BrC PBL AAOD and does not reflect the measured BrC PBL AAOD spatial variability. The model shows higher absorption direct radiative effects (DRE) from BrC at northern high latitudes than at midlatitudes in spring and summer, due to boreal fire emissions, long whitening lifetimes, and high surface albedos. These findings highlight the need to study BrC over the Arctic region. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Boundary layers; Carbon; Aerosol optical depths; Chemical transport models; Interagency monitoring of protected visual environments; Observation networks; Planetary boundary layers; Radiative effects; Spatial and temporal variability; Spatial variability; Bromine compounds; aerosol composition; air quality; atmospheric pollution; biomass burning; boundary layer; brown carbon; optical depth; radiative transfer; spatial variation; temporal variation; Arctic; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169336
作者单位	Department of Chemistry and Biochemistry and Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; School of Energy and Environment, City University of Hong Kong, Hong Kong; Department of Environmental and Occupational Health, University of Nevada, Las Vegas, NV, United States; Division of Atmospheric Sciences, Desert Research Institute, Reno, NV, United States; Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States
推荐引用方式 GB/T 7714	June N.A.,Wang X.,Chen L.W.A.,et al. Spatial and Temporal Variability of Brown Carbon in the United States: Implications for Direct Radiative Effects[J],2020,47(23).
APA	June N.A..,Wang X..,Chen L.W.A..,Chow J.C..,Watson J.G..,...&Mao J..(2020).Spatial and Temporal Variability of Brown Carbon in the United States: Implications for Direct Radiative Effects.Geophysical Research Letters,47(23).
MLA	June N.A.,et al."Spatial and Temporal Variability of Brown Carbon in the United States: Implications for Direct Radiative Effects".Geophysical Research Letters 47.23(2020).