Low-latitude Cloud Feedbacks on Climate Sensitivity CPT

Goal: Increase our understanding of tropical and subtropical cloud
feedbacks on climate sensitivity, and reduce the large uncertainty in GCM
simulations of these feedbacks:

(1) Diagnose in detail the reasons for different behavior of NCAR vs. GFDL
    low cloud distribution with 2xCO2

(2) Try to constrain the relevant cloud feedbacks using current and
    historical data, esp. the low cloud feedbacks relevant to (1).

(3) Improve relevant GCM parameterizations using best available
    physics, focussing esp. on cloud microphysics, shallow and deep cumulus
    convection, and cloud-topped PBLs.

Organization
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Lead PI: Christopher S Bretherton, University of Washington

Core PIs (outside modeling centers)

Chris Bretherton (U Wash)  PBL and convective cloud parameterization
Marat Khairoutdinov (CSU)  'Superparameterization' datasets.
                            CRM simulations of realistic tropical deep
			    convection; 
Steve Klein (LLNL/ARM)     Cloud parameterization and observation
Cara-lyn Lappen (CSU)      Unified turbulence/cumulus param.
Brian Mapes (NOAA/CDC)     Diagnosis of convective cloud feedbacks on
                            climate from sat obs. Input into 
                            convection/microphysics param. development.
Joel Norris (Scripps)      Diagnosis of historical cloud record.
Robert Pincus (NOAA/CDC)   Microphysical/radiative diagnosis and param. 
                            diagnosis and development
Bjorn Stevens (UCLA)       LES modeling in support of CPT?
                            Warm cloud microphysical processes and entrainment.
Kuan-Man Xu(NASA)          New satellite products relevant to cloud
                            feedbacks on climate sensitivity (Wielicki
			    group).
Minghua Zhang (SUNY)       GCM cloud/convection diagnosis and validation 


Modeling Centers
            Lead PI        CPT liaison    Other scientists
GFDL       Isaac Held      Ming Zhao     Leo Donner, Brian Soden
NCAR       Jeff Kiehl      TBA           Bill Collins, Phil Rasch, Jim Hack
GMAO(NASA) Julio Bacmeister              Max Suarez

Advisory panel (invited to an annual meeting to offer penetrating advice
  and comments; may also provide datasets, etc.)

Bruce Albrecht(RSMAS)     Shallow cu obs and bulk models.
Chris Fairall(NOAA/ETL)   Shipboard cloud/PBL/surface flux measurements
Tony del Genio(GISS)      GISS GCM ; microphysical param.
Steve Ghan(PNL)           Cloud/aerosol param, ARM.
Greg McFarquhar(U Ill)    Ice microphysics
Roberto Mechoso (UCLA)    GCM climate/low cloud feedbacks+UCLA model
Hua-lu Pan (NCEP)         NCEP model physical parameterizations
Dave Randall(CSU)         CSU model physical parameterizations.
Dave Raymond(NMIMT)       Deep convection/Radiation/microphysics obs/theory
Max Suarez(NASA)          GSFC GCM; coupled modeling
Joao Teixeira (NRL)       PBL and cloud processes/Navy models.
Bob Weller(WHOI)          Surface fluxes/ocean feedbacks