A methodology for forming components of the linear model in 4D-Var with application to the marine boundary layer

2009 ◽  
pp. n/a-n/a ◽  
Author(s):  
Tim Payne
Keyword(s):  
Boundary Layer ◽  
Linear Model ◽  
Marine Boundary Layer

Remote Sensing and Prediction of the Coastal Marine Boundary Layer

2001 ◽  
Author(s):  
Brian H. Fiedler ◽  
Yefim Kogan ◽  
Alan Shapiro ◽  
Vince Wong ◽  
Joshua Wurman
Keyword(s):  
Remote Sensing ◽  
Boundary Layer ◽  
Marine Boundary Layer ◽  
Coastal Marine

Remote Sensing and Prediction of the Coastal Marine Boundary Layer

1997 ◽  
Author(s):  
Brian H. Fiedler ◽  
Frederick Carr ◽  
Yefim Kogan ◽  
Alan Shapiro ◽  
Vince Wong ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Boundary Layer ◽  
Marine Boundary Layer ◽  
Coastal Marine

scholarly journals Modeling microphysical effects of entrainment in clouds observed during EUCAARI-IMPACT field campaign

2013 ◽  
Vol 13 (16) ◽  
pp. 8489-8503 ◽  
Author(s):  
D. Jarecka ◽  
H. Pawlowska ◽  
W. W. Grabowski ◽  
A. A. Wyszogrodzki
Keyword(s):  
Boundary Layer ◽  
Turbulent Mixing ◽  
Marine Boundary Layer ◽  
Cloud Droplet ◽  
Droplet Radius ◽  
Subgrid Scale ◽  
Microphysics Scheme ◽  
Local Conditions ◽  
Field Campaign ◽  
Les Model

Abstract. This paper discusses aircraft observations and large-eddy simulation (LES) modeling of 15 May 2008, North Sea boundary-layer clouds from the EUCAARI-IMPACT field campaign. These clouds are advected from the northeast by the prevailing lower-tropospheric winds and featured stratocumulus-over-cumulus cloud formations. An almost-solid stratocumulus deck in the upper part of the relatively deep, weakly decoupled marine boundary layer overlays a field of small cumuli. The two cloud formations have distinct microphysical characteristics that are in general agreement with numerous past observations of strongly diluted shallow cumuli on one hand and solid marine stratocumulus on the other. Based on the available observations, a LES model setup is developed and applied in simulations using a novel LES model. The model features a double-moment warm-rain bulk microphysics scheme combined with a sophisticated subgrid-scale scheme allowing local prediction of the homogeneity of the subgrid-scale turbulent mixing. The homogeneity depends on the characteristic time scales for the droplet evaporation and for the turbulent homogenization. In the model, these scales are derived locally based on the subgrid-scale turbulent kinetic energy, spatial scale of cloudy filaments, mean cloud droplet radius, and humidity of the cloud-free air entrained into a cloud, all predicted by the LES model. The model reproduces contrasting macrophysical and microphysical characteristics of the cumulus and stratocumulus cloud layers. Simulated subgrid-scale turbulent mixing within the cumulus layer and near the stratocumulus top is on average quite inhomogeneous, but varies significantly depending on the local conditions.

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