Case 1: Tropical oceanic squall line

Two- and three-dimensional modeling of a squall line on a time scale of a few hours. The initial conditions and evaluation data sets were obtained as part of an intensive observation period in TOGA COARE.

Case 1 description and results

Paper on cloud-resolving model intercomparison results

Paper on single-column model intercomparison results

Leader: Jean-Luc Redelsperger

Case 2: Tropical oceanic deep convection

Two- and three-dimensional modeling of the evolution of convection subjected to observed, time-dependent, large-scale forcing on a time scale of a week. Initial conditions for the simulations, the evolving large-scale forcing and the data used in model evaluation are averages over the TOGA COARE Intensive Flux Array (IFA).

Case 2 description and results

Leader: Steve Krueger

Case 2 radiation code offline intercomparison

The purpose of this exercise is to examine and compare the surface heat fluxes, radiative heating rates and fluxes, and microphysical fields from the CRM and SCM models at one instant of time during the Case 2 period.

Description

Leaders: Wei-Kuo Tao and Dan Johnson

Case 3: Continental deep convection

This model intercomparison case involves two new aspects:

• It is a continental case based on intensive measurements taken at the Dept of Energy's ARM (Atmospheric Radiation Measurement program) Southern Great Plains experimental site during June and July 1997. The millimeter cloud radar (MMCR) was operational during this time and has provided profiles of cloud fraction. The ARM SGP site also has a very extensive array of other meteorological instruments.
• It is being done in collaboration with the ARM Single Column Modeling Group. This has brought in more SCMers and the support of the ARM DSIT (Data and Science Integration Team) to provide the forcing and evaluation data and to compile the results submitted by the modelers.

Leaders: Steve Krueger and Kuan-Man Xu