气候变化领域集成服务门户(CCPortal): Relationships Between Precipitation Properties and Large-Scale Conditions During Subsidence at the Eastern North Atlantic Observatory

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DOI	10.1029/2019JD031848
	Relationships Between Precipitation Properties and Large-Scale Conditions During Subsidence at the Eastern North Atlantic Observatory
	Lamer K.; Naud C.M.; Booth J.F.
发表日期	2020
ISSN	2169897X
卷号	125 期号:7
英文摘要	Three years of reanalysis and ground-based observations collected at the Eastern North Atlantic (ENA) observatory are analyzed to document the properties of rain and boundary layer clouds and their relationship with the large-scale environment during general subsidence conditions and following cold front passages. Clouds in the wake of cold fronts exhibit on average a 10% higher propensity to precipitate and higher rain-to-cloud fraction than cloud found in general subsidence conditions. Similarities in the seasonal cycle of rain and of large-scale properties suggest that the large-scale conditions created by the cold front passage are responsible for the unique properties of the rain forming in its wake. The identification of monotonic relationships between rain-to-cloud fraction and rain rate with surface forcing and boundary layer stability parameters as well as between virga base height with stability and humidity measures further supports that large-scale conditions impact precipitation variability. That being said, these relationships between the large-scale and rain properties are less clear than those established between cloud and rain properties, suggesting that cloud macrophysics have a more direct impact on the properties of rain than the large-scale environment. The applicability of previously documented relationships between cloud thickness and rain properties is tested and the relationships adjusted to accommodate the complex shallow clouds and melting precipitation observed to occur in the ENA region. Establishing these relationships opens up opportunities for parametrization development and suggests that a realistic representation of precipitation properties in models relies on the accurate representation of both clouds and the large-scale environment. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Cold air outbreak; melting layer; observations; post cold frontal; rain rate; rain-to-cloud fraction
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186068
作者单位	Earth and Atmospheric Sciences, The City University of New York, City College New York, NY, United States; Applied Physics and Applied Mathematics, Columbia University/NASA-GISS, New York, NY, United States; The Graduate Center, City University of New York, New York, NY, United States; Now at the Department of Environmental and Climate Sciences, Brookhaven National Laboratory, Upton, NY, United States
推荐引用方式 GB/T 7714	Lamer K.,Naud C.M.,Booth J.F.. Relationships Between Precipitation Properties and Large-Scale Conditions During Subsidence at the Eastern North Atlantic Observatory[J],2020,125(7).
APA	Lamer K.,Naud C.M.,&Booth J.F..(2020).Relationships Between Precipitation Properties and Large-Scale Conditions During Subsidence at the Eastern North Atlantic Observatory.Journal of Geophysical Research: Atmospheres,125(7).
MLA	Lamer K.,et al."Relationships Between Precipitation Properties and Large-Scale Conditions During Subsidence at the Eastern North Atlantic Observatory".Journal of Geophysical Research: Atmospheres 125.7(2020).