MAR549 - Fall 2008
CURRENT TOPICS IN ATMOSPHERIC PHYSICS:
LARGE-EDDY SIMULATION OF CLOUDY BOUNDARY LAYERS: GCSS CASES

Fridays 1:30-3:20 pm
Endeavour 168



Instructor Prof. Marat Khairoutdinov

Office hours   Tu/Th 1:00-3:00 pm, or by email appt; Endeavour 205

Email  mkhairoutdin@ms.cc.sunysb.edu

Grading S/U

Outline

The GEWEX (Global Energy and Water Cycle Experiment) Cloud System Study (GCSS) is one of the GEWEX international modeling projects with the goal to evaluate state-of-the art cloud models and to develop new physically based cloud parameterizations for weather-forecasting and global climate models. The GCSS Boundary Layer Cloud Working Group (BLCWG) has been one of the most active and successful among the GCSS working groups. Since 1994, the BLCWG has conducted close to a dozen large-eddy-simulation (LES) model intercomparisons based on idealized as well as observed cases of cloud-topped boundary layers.

We will study relevant journal articles, review and discuss the following GCSS Boundary Layer Working Group cases.

1.  FIRE Nocturnal Stratocumulus
2.  Idealized Smoke case
3.  ASTEX Lagrangian Experiment
4.  ASTEX Stratocumulus
5.  BOMEX Trade Wind Cumulus
6.  ATEX Transitional Trade Cumulus
7.  ARM Continental Cumulus with diurnal cycle
8.  DYCOMS Nocturnal Non-precipitating Stratocumulus
9.  DYCOMS Nocturnal Precipitating Stratocumulus
10. RICO Precipitating Trade Cumulus

Each student will be required to set up, run and analyze one of the above cases using a state-of-the-art LES model, the System for Atmospheric Modeling (SAM). Computational resources will be provided along with the basic support and instructions how to set, compile and run the model. The UNIX skills as well ability to make basic x-y plots are required.

Discussion Articles

Classical:
Lilly 1968 - Sep 12, 19
Idealized stratocumulus from FIRE:  Moeng et al. 1996
Idealized Smoke case: Bretherton et al, 1999 - Sep 26
ASTEX Lagrangian Experiment: Bretherton et al 1999
- Oct 3
BOMEX Trade Cumuli: Siebesma et al 2003 - Oct 10, 17
ATEX Transtional Trade Cumulus: Stevens et al 2001 - Oct 17
ARM Shallow Cu Diurnal Cycle: Brown et al 2002 - Oct 24
DYCOMS-II RF01 Stratocumulus: Stevens et al 2005  - Oct 31
DYCOMS-II RF02 Drizzling Stratocumulus: Bretherton_et al_2007  -Nov 7
           Ackerman et al 2008  
Transition from shallow to deep convection: LBA. - Nov 14
Grabowski et al 2006, Khairoutdinov and Randall 2006

Shallow to Deep transition, Maritime: Kuang and Bretherton 2006 - Nov 21         
Review of moist convection: Stevens 2005 - Dec 5         

Supplemental materials

Introduction 
ASTEX etc





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