气候变化领域集成服务门户(CCPortal): Assessing the vertical structure of Arctic aerosols using balloon-borne measurements

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DOI	10.5194/acp-21-1737-2021
	Assessing the vertical structure of Arctic aerosols using balloon-borne measurements
	Creamean J.M.; De Boer G.; Telg H.; Mei F.; Dexheimer D.; Shupe M.D.; Solomon A.; McComiskey A.
发表日期	2021
ISSN	1680-7316
起始页码	1737
结束页码	1757
卷号	21 期号:3
英文摘要	The rapidly warming Arctic is sensitive to perturbations in the surface energy budget, which can be caused by clouds and aerosols. However, the interactions between clouds and aerosols are poorly quantified in the Arctic, in part due to (1) limited observations of vertical structure of aerosols relative to clouds and (2) ground-based observations often being inadequate for assessing aerosol impacts on cloud formation in the characteristically stratified Arctic atmosphere. Here, we present a novel evaluation of Arctic aerosol vertical distributions using almost 3 years' worth of tethered balloon system (TBS) measurements spanning multiple seasons. The TBS was deployed at the U.S. Department of Energy Atmospheric Radiation Measurement Program's facility at Oliktok Point, Alaska. Aerosols were examined in tandem with atmospheric stability and ground-based remote sensing of cloud macrophysical properties to specifically address the representativeness of near-surface aerosols to those at cloud base. Based on a statistical analysis of the TBS profiles, ground-based aerosol number concentrations were unequal to those at cloud base 86 % of the time. Intermittent aerosol layers were observed 63 % of the time due to poorly mixed below-cloud environments, mostly found in the spring, causing a decoupling of the surface from the cloud layer. A uniform distribution of aerosol below cloud was observed only 14 % of the time due to a well-mixed below-cloud environment, mostly during the fall. The equivalent potential temperature profiles of the below-cloud environment reflected the aerosol profile 89 % of the time, whereby a mixed or stratified below-cloud environment was observed during a uniform or layered aerosol profile, respectively. In general, a combination of aerosol sources, thermodynamic structure, and wet removal processes from clouds and precipitation likely played a key role in establishing observed aerosol vertical structures. Results such as these could be used to improve future parameterizations of aerosols and their impacts on Arctic cloud formation and radiative properties. © 2021 Author(s).
语种	英语
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/168778
作者单位	Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80526, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80509, United States; Physical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, United States; Pacific Northwest National Laboratory, Richland, WA 99354, United States; Sandia National Laboratories, Albuquerque, NM 87123, United States; Brookhaven National Laboratory, Uptown, NY 11973, United States
推荐引用方式 GB/T 7714	Creamean J.M.,De Boer G.,Telg H.,et al. Assessing the vertical structure of Arctic aerosols using balloon-borne measurements[J],2021,21(3).
APA	Creamean J.M..,De Boer G..,Telg H..,Mei F..,Dexheimer D..,...&McComiskey A..(2021).Assessing the vertical structure of Arctic aerosols using balloon-borne measurements.Atmospheric Chemistry and Physics,21(3).
MLA	Creamean J.M.,et al."Assessing the vertical structure of Arctic aerosols using balloon-borne measurements".Atmospheric Chemistry and Physics 21.3(2021).