DOI: 10.1002/2016MS000822
Scopus记录号: 2-s2.0-85010791726
论文题名: The “Grey Zone” cold air outbreak global model intercomparison: A cross evaluation using large-eddy simulations
作者: Tomassini L ; , Field P ; R ; , Honnert R ; , Malardel S ; , McTaggart-Cowan R ; , Saitou K ; , Noda A ; T ; , Seifert A
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 1 起始页码: 39
结束页码: 64
语种: 英语
英文关键词: Boundary layers
; Climate models
; Clouds
; Cold working
; Mixing
; Parameterization
; Precipitation (meteorology)
; Weather forecasting
; Boundary layer structure
; Convection parameterization
; Gray zone
; Highest resolutions
; North Atlantic Ocean
; Numerical experimentations
; Numerical weather prediction models
; Scale-aware parameterizations
; Large eddy simulation
; atmospheric convection
; boundary layer
; experimental study
; global climate
; large eddy simulation
; parameterization
; stratocumulus
; turbulent mixing
; vertical mixing
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: A stratocumulus-to-cumulus transition as observed in a cold air outbreak over the North Atlantic Ocean is compared in global climate and numerical weather prediction models and a large-eddy simulation model as part of the Working Group on Numerical Experimentation “Grey Zone” project. The focus of the project is to investigate to what degree current convection and boundary layer parameterizations behave in a scale-adaptive manner in situations where the model resolution approaches the scale of convection. Global model simulations were performed at a wide range of resolutions, with convective parameterizations turned on and off. The models successfully simulate the transition between the observed boundary layer structures, from a well-mixed stratocumulus to a deeper, partly decoupled cumulus boundary layer. There are indications that surface fluxes are generally underestimated. The amount of both cloud liquid water and cloud ice, and likely precipitation, are under-predicted, suggesting deficiencies in the strength of vertical mixing in shear-dominated boundary layers. But also regulation by precipitation and mixed-phase cloud microphysical processes play an important role in the case. With convection parameterizations switched on, the profiles of atmospheric liquid water and cloud ice are essentially resolution-insensitive. This, however, does not imply that convection parameterizations are scale-aware. Even at the highest resolutions considered here, simulations with convective parameterizations do not converge toward the results of convection-off experiments. Convection and boundary layer parameterizations strongly interact, suggesting the need for a unified treatment of convective and turbulent mixing when addressing scale-adaptivity. © 2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75806
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Met Office, Exeter, United Kingdom; CNRM, Météo France/CNRS, Toulouse, France; European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom; Environment and Climate Change Canada, Dorval, QC, Canada; Japan Meteorological Agency, Tokyo, Japan; Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan; Deutscher Wetterdienst, Offenbach, Germany
Recommended Citation:
Tomassini L,, Field P,R,et al. The “Grey Zone” cold air outbreak global model intercomparison: A cross evaluation using large-eddy simulations[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(1)