气候变化领域集成服务门户(CCPortal): Turbulent Transport in the Gray Zone: A Large Eddy Model Intercomparison Study of the CONSTRAIN Cold Air Outbreak Case

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DOI	10.1029/2018MS001443
	Turbulent Transport in the Gray Zone: A Large Eddy Model Intercomparison Study of the CONSTRAIN Cold Air Outbreak Case
	de Roode S.R.; Frederikse T.; Siebesma A.P.; Ackerman A.S.; Chylik J.; Field P.R.; Fricke J.; Gryschka M.; Hill A.; Honnert R.; Krueger S.K.; Lac C.; Lesage A.T.; Tomassini L.
发表日期	2019
ISSN	19422466
起始页码	597
结束页码	623
卷号	11 期号:3
英文摘要	To quantify the turbulent transport at gray zone length scales between 1 and 10 km, the Lagrangian evolution of the CONSTRAIN cold air outbreak case was simulated with seven large eddy models. The case is characterized by rather large latent and sensible heat fluxes and a rapid deepening rate of the boundary layer. In some models the entrainment velocity exceeds 4 cm/s. A significant fraction of this growth is attributed to a strong longwave radiative cooling of the inversion layer. The evolution and the timing of the breakup of the stratocumulus cloud deck differ significantly among the models. Sensitivity experiments demonstrate that a decrease in the prescribed cloud droplet number concentration and the inclusion of ice microphysics both act to speed up the thinning of the stratocumulus by enhancing the production of precipitation. In all models the formation of mesoscale fluctuations is clearly evident in the cloud fields and also in the horizontal wind velocity. Resolved vertical fluxes remain important for scales up to 10 km. The simulation results show that the resolved vertical velocity variance gradually diminishes with a coarsening of the horizontal mesh, but the total vertical fluxes of heat, moisture, and momentum are only weakly affected. This is a promising result as it demonstrates the potential use of a mesh size-dependent turbulent length scale for convective boundary layers at gray zone model resolutions. ©2019. The Authors.
英文关键词	cold air outbreak; gray zone; large eddy models; stratocumulus
语种	英语
scopus关键词	Abstracting; Atmospheric thermodynamics; Boundary layer flow; Boundary layers; Clouds; Coarsening; Mesh generation; Precipitation (meteorology); Radiative Cooling; Cloud droplet number concentrations; Cold air outbreak; Convective boundary layers; Entrainment velocities; Gray zone; Large eddy model; stratocumulus; Stratocumulus clouds; Air; cloud droplet; cold air; eddy covariance; entrainment; Lagrangian analysis; large eddy simulation; latent heat flux; moisture content; sensible heat flux; stratocumulus; wind field
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156949
作者单位	Department of Geosciences and Remote Sensing, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands; NASA Goddard Institute for Space Studies, New York, NY, United States; Institute for Geophysics and Meteorology, Department of Geosciences, University of Cologne, Cologne, Germany; U.K. Meteorological Office, Exeter, United Kingdom; Institut für Meteorologie und Klimatologie, Leibniz Universität, Hannover, Germany; Meteo-France, Toulouse, France; Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT, United States; Max PIanck Institute for Meteorology, Hamburg, Germany
推荐引用方式 GB/T 7714	de Roode S.R.,Frederikse T.,Siebesma A.P.,et al. Turbulent Transport in the Gray Zone: A Large Eddy Model Intercomparison Study of the CONSTRAIN Cold Air Outbreak Case[J],2019,11(3).
APA	de Roode S.R..,Frederikse T..,Siebesma A.P..,Ackerman A.S..,Chylik J..,...&Tomassini L..(2019).Turbulent Transport in the Gray Zone: A Large Eddy Model Intercomparison Study of the CONSTRAIN Cold Air Outbreak Case.Journal of Advances in Modeling Earth Systems,11(3).
MLA	de Roode S.R.,et al."Turbulent Transport in the Gray Zone: A Large Eddy Model Intercomparison Study of the CONSTRAIN Cold Air Outbreak Case".Journal of Advances in Modeling Earth Systems 11.3(2019).