The Whole Atmosphere Community Climate Model (WACCM) Thursday-Friday 20-21 June 2002 Front Range Theatre 01:00-05:30 pm

Workshop format: The Workshop will consist of a small number of invited talks (40-45 minutes), with an extended period of discussion (20 minutes) following each presentation. There will be no contributed talks. Workshop participants are encouraged to come prepared to contribute to the general discussion.

The Whole Atmosphere Community Climate Model (WACCM) is a comprehensive model of the Earth's atmosphere, presently extending from the surface to 140 km, that unifies aspects of numerical modeling studies of interest to three divisions (HAO, ACD, and CGD) at the National Center for Atmospheric Research.

The development of WACCM is motivated by the need to study phenomena that couple different layers of the atmosphere, including:

• The effects of solar variability on the middle and upper atmosphere and their possible links to the troposphere;
  
  
• The effect of anthropogenic forcing on the chemical composition of the stratosphere, mesosphere and lower thermosphere, and feedbacks onto the dynamical and thermal structure of the region;
  
  
• The linkage between natural variability of the wintertime stratosphere and the behavior of tropospheric climate patterns such as the Artic oscillation, or "annular mode";
  
  
• The influence of waves propagating from the lower atmosphere on the dynamics and chemical composition of the mesosphere and lower thermosphere;
  
  
• The interpretation of data from spacecraft missions that will observe the stratosphere, mesosphere and lower thermosphere.

The purpose of the WACCM Workshop is to:

• Provide a forum for scientists of diverse backgrounds to discuss topics related to coupling of atmospheric layers, from the troposphere to the lower thermosphere;
  
  
• Establish guidelines for community involvement in WACCM.

THURSDAY, JUNE 20 (AM)

• 09:10-10:10, The Whole Atmosphere Community Climate Model:  Motivation, Development and Initial Results
  (CEDAR tutorial)  (R.R. Garcia, NCAR, Boulder, CO, USA)

• 01:00-02:00, Water vapor in the middle atmosphere (abstract)
  (A. Dessler, University of Maryland, USA)
• 02:00-03:00, Effects of solar variability on the middle atmosphere (abstract)
  (K. Kodera, Meteorological Research Institute, Tsukuba, JAPAN)
• 03:30-04:30, Dynamics of the MLTI Region (abstract)
  (J. Forbes, University of Colorado, Boulder, CO, USA)
• Modeling and Observations of the Atmospheric Thermal Structure,
  04:30-05:30, Chemical Composition, and Radiation Balance using WACCM and
  Satellite Data (abstract)
  (M. Mlynczak, NASA Langley Research Center, Hampton, VA, USA)

• 01:00-02:00, Convective parameterizations and tropical dynamics (abstract)
  (L. Ricciardulli, Remote Sensing Systems, Santa Rosa, CA, USA)
• 02:00-03:00, Modeling the Quasibiennial Oscillation (abstract)
  (M. Giorgetta / E. Manzini, Max Planck Institute, Hamburg, GERMANY)
• 03:30-04:30, The winter stratosphere and the annular mode (abstract)
  (T. Dunkerton, NorthWest Research Associates, Bellevue, WA, USA)
• 04:30-05:30, General Discussion: Model Status and Guidelines for Future Use
  (led by B. Boville, NCAR/CGD)