气候变化领域集成服务门户(CCPortal): Observations and hypotheses related to low to middle free tropospheric aerosol; water vapor and altocumulus cloud layers within convective weather regimes: A SEAC4RS case study

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DOI	10.5194/acp-19-11413-2019
	Observations and hypotheses related to low to middle free tropospheric aerosol; water vapor and altocumulus cloud layers within convective weather regimes: A SEAC4RS case study
	Reid J.S.; Posselt D.J.; Kaku K.; Holz R.A.; Chen G.; Eloranta E.W.; Kuehn R.E.; Woods S.; Zhang J.; Anderson B.; Paul Bui T.; Diskin G.S.; Minnis P.; Newchurch M.J.; Tanelli S.; Trepte C.R.; Lee Thornhill K.; Ziemba L.D.
发表日期	2019
ISSN	16807316
起始页码	11413
结束页码	11442
卷号	19 期号:17
英文摘要	The NASA Studies of Emissions and Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys (SEAC4RS) project included goals related to aerosol particle life cycle in convective regimes. Using the University of Wisconsin High Spectral Resolution Lidar system at Huntsville, Alabama, USA, and the NASA DC-8 research aircraft, we investigate the altitude dependence of aerosol, water vapor and Altocumulus (Ac) properties in the free troposphere from a canonical 12 August 2013 convective storm case as a segue to a presentation of a mission-wide analysis. It stands to reason that any moisture detrainment from convection must have an associated aerosol layer. Modes of covariability between aerosol, water vapor and Ac are examined relative to the boundary layer entrainment zone, 0 °C level, and anvil, a region known to contain Ac clouds and a complex aerosol layering structure (Reid et al., 2017). Multiple aerosol layers in regions warmer than 0 °C were observed within the planetary boundary layer entrainment zone. At 0 °C there is a proclivity for aerosol and water vapor detrainment from storms, in association with melting level Ac shelves. Finally, at temperatures colder than 0 °C, weak aerosol layers were identified above Cumulus congestus tops (∼ 0 and ∼-20 °C). Stronger aerosol signals return in association with anvil outflow. In situ data suggest that detraining particles undergo aqueous-phase or heterogeneous chemical or microphysical transformations, while at the same time larger particles are being scavenged at higher altitudes leading to enhanced nucleation. We conclude by discussing hypotheses regarding links to aerosol emissions and potential indirect effects on Ac clouds. © 2019 Author(s).
语种	英语
scopus关键词	aerosol; altitude; convective system; cumulus; hypothesis testing; satellite mission; troposphere; water vapor; Alabama; Huntsville; 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/144160
作者单位	US Naval Research Laboratory, Marine Meteorology Division, Monterey, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; General Dynamics Information Technology, Naval Research Laboratory, Monterey, CA, United States; Space Sciences Engineering Center, University of Wisconsin, Madison, WI, United States; NASA Langley Research Center, Science Dirct., Hampton, VA, United States; SPEC Inc., Boulder, CO, United States; University of North Dakota, Department of Atmospheric Sciences, Grand Forks, ND, United States; NASA Ames Research Center, Earth Science Division, Moffett Field, CA, United States; Department of Atmospheric and Earth Science, University of Alabama in Huntsville, Huntsville, AL, United States; Science Systems and Applications Inc., Hampton, VA, United States
推荐引用方式 GB/T 7714	Reid J.S.,Posselt D.J.,Kaku K.,et al. Observations and hypotheses related to low to middle free tropospheric aerosol; water vapor and altocumulus cloud layers within convective weather regimes: A SEAC4RS case study[J],2019,19(17).
APA	Reid J.S..,Posselt D.J..,Kaku K..,Holz R.A..,Chen G..,...&Ziemba L.D..(2019).Observations and hypotheses related to low to middle free tropospheric aerosol; water vapor and altocumulus cloud layers within convective weather regimes: A SEAC4RS case study.Atmospheric Chemistry and Physics,19(17).
MLA	Reid J.S.,et al."Observations and hypotheses related to low to middle free tropospheric aerosol; water vapor and altocumulus cloud layers within convective weather regimes: A SEAC4RS case study".Atmospheric Chemistry and Physics 19.17(2019).