气候变化领域集成服务门户(CCPortal): Aerosol characteristics at the Southern Great Plains site during the HI-SCALE campaign

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DOI	10.5194/acp-21-5101-2021
	Aerosol characteristics at the Southern Great Plains site during the HI-SCALE campaign
	Liu J.; Alexander L.; D. Fast J.; Lindenmaier R.; Shilling J.E.
发表日期	2021
ISSN	1680-7316
起始页码	5101
结束页码	5116
卷号	21 期号:6
英文摘要	Large uncertainties exist in global climate model predictions of radiative forcing due to insufficient understanding and simplified numerical representation of cloud formation and cloud-aerosol interactions. The Holistic Interactions of Shallow Clouds, Aerosols and Land Ecosystems (HI-SCALE) campaign was conducted near the DOE's Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site in north-central Oklahoma to provide a better understanding of land-atmosphere interactions, aerosol and cloud properties, and the influence of aerosol and land- atmosphere interactions on cloud formation. The HI-SCALE campaign consisted of two intensive observational periods (IOPs) (April-May and August-September, 2016), during which coincident measurements were conducted both on the G-1 aircraft platform and at the SGP ground site. In this study we focus on the observations at the SGP ground site. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) and an Ionicon protontransfer- reaction mass spectrometer (PTR-MS) were deployed, characterizing chemistry of non-refractory aerosol and trace gases, respectively. Contributions from various aerosol sources, including biogenic and biomass burning emissions, were retrieved using factor analysis of the AMS data. In general, the organic aerosols at the SGP site was highly oxidized, with oxygenated organic aerosol (OOA) identified as the dominant factor for both the spring and summer IOP though more aged in spring. Cases of isopreneepoxydiol- derived secondary organic aerosol (IEPOX SOA) and biomass burning events were further investigated to understand additional sources of organic aerosol. Unlike other regions largely impacted by IEPOX chemistry, the IEPOX SOA at SGP was more highly oxygenated, likely due to the relatively weak local emissions of isoprene. Biogenic emissions appear to largely control the formation of organic aerosol (OA) during the HI-SCALE campaign. Potential HOM (highly oxygenated molecule) chemistry likely contributes to the highly oxygenated feature of aerosols at the SGP site, with impacts on new particle formation and global climate. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; aerosol composition; biomass burning; climate modeling; cloud radiative forcing; concentration (composition); numerical model; prediction; Oklahoma [United States]; United States
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/247007
作者单位	Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; School of Environment, Harbin Institute of Technology, Harbin, 150001, China; Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, United States
推荐引用方式 GB/T 7714	Liu J.,Alexander L.,D. Fast J.,et al. Aerosol characteristics at the Southern Great Plains site during the HI-SCALE campaign[J],2021,21(6).
APA	Liu J.,Alexander L.,D. Fast J.,Lindenmaier R.,&Shilling J.E..(2021).Aerosol characteristics at the Southern Great Plains site during the HI-SCALE campaign.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(6).
MLA	Liu J.,et al."Aerosol characteristics at the Southern Great Plains site during the HI-SCALE campaign".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.6(2021).