气候变化领域集成服务门户(CCPortal): Properties of Arctic liquid and mixed-phase clouds from shipborne Cloudnet observations during ACSE 2014

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DOI	10.5194/acp-20-14983-2020
	Properties of Arctic liquid and mixed-phase clouds from shipborne Cloudnet observations during ACSE 2014
	Achtert P.; Oconnor E.J.; Brooks I.M.; Sotiropoulou G.; Shupe M.D.; Pospichal B.; Brooks B.J.; Tjernström M.
发表日期	2020
ISSN	1680-7316
起始页码	14983
结束页码	15002
卷号	20 期号:23
英文摘要	This study presents Cloudnet retrievals of Arctic clouds from measurements conducted during a 3-month research expedition along the Siberian shelf during summer and autumn 2014. During autumn, we find a strong reduction in the occurrence of liquid clouds and an increase for both mixed-phase and ice clouds at low levels compared to summer. About 80% of all liquid clouds observed during the research cruise show a liquid water path below the infrared black body limit of approximately 50 gm2. The majority of mixed-phase and ice clouds had an ice water path below 20 gm2. Cloud properties are analysed with respect to cloud-Top temperature and boundary layer structure. Changes in these parameters have little effect on the geometric thickness of liquid clouds while mixed-phase clouds during warm-Air advection events are generally thinner than when such events were absent. Cloud-Top temperatures are very similar for all mixed-phase clouds. However, more cases of lower cloudtop temperature were observed in the absence of warm-Air advection. Profiles of liquid and ice water content are normalized with respect to cloud base and height. For liquid water clouds, the liquid water content profile reveals a strong increase with height with a maximum within the upper quarter of the clouds followed by a sharp decrease towards cloud top. Liquid water content is lowest for clouds observed below an inversion during warm-Air advection events. Most mixedphase clouds show a liquid water content profile with a very similar shape to that of liquid clouds but with lower maximum values during events with warm air above the planetary boundary layer. The normalized ice water content profiles in mixed-phase clouds look different from those of liquid water content. They show a wider range in maximum values with the lowest ice water content for clouds below an inversion and the highest values for clouds above or extending through an inversion. The ice water content profile generally peaks at a height below the peak in the liquid water content profile-usually in the centre of the cloud, sometimes closer to cloud base, likely due to particle sublimation as the crystals fall through the cloud. © 2020 Copernicus GmbH. All rights reserved.
英文关键词	atmospheric convection; boundary layer; cloud microphysics; ice; seasonal variation; shipborne measurement; water content; Arctic Ocean; Siberian Shelf
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/168916
作者单位	Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Finnish Meteorological Institute, Helsinki, Finland; Meteorology Department, University of Reading, Reading, United Kingdom; Department of Meteorology and the Bert Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Cooperative Institute for the Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; Institute for Geophysics and Meteorology, University of Cologne, Cologne, Germany; National Centre for Atmospheric Science, University of Leeds, Leeds, United Kingdom; Meteorological Observatory Hohenpeißenberg, German Weather Service, Hohenpeißenberg, Germany; Laboratory of Atmospheric Processes and Their Impacts, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne ...
推荐引用方式 GB/T 7714	Achtert P.,Oconnor E.J.,Brooks I.M.,et al. Properties of Arctic liquid and mixed-phase clouds from shipborne Cloudnet observations during ACSE 2014[J],2020,20(23).
APA	Achtert P..,Oconnor E.J..,Brooks I.M..,Sotiropoulou G..,Shupe M.D..,...&Tjernström M..(2020).Properties of Arctic liquid and mixed-phase clouds from shipborne Cloudnet observations during ACSE 2014.Atmospheric Chemistry and Physics,20(23).
MLA	Achtert P.,et al."Properties of Arctic liquid and mixed-phase clouds from shipborne Cloudnet observations during ACSE 2014".Atmospheric Chemistry and Physics 20.23(2020).