Global Parallel Experiment Log
- Experiment Name
Prognostic Cloud Condensate with new Convection and new Radiation with latest analysis
- Parallel Slot
- Control Slot
- Start date of parallel experiment
- End date of parallel experiment
- Environmental Modeling Center scientists
- Abstract (including Motivation, Hypothesis and Method)
A number of improvements to the operational global model
are slated for implementation in 2001.
The motivations for these changes are
- improved link between precipitation physics and clouds and radiation physics
- improved analysis
OBSERVATIONAL AND ANALYSIS CHANGES
The saturation vapor pressure calculation is now made with respect to water,
ice or mixed phase depending on temperature.
The weight given to moisture constraint limit is reduced by one order of
magnitude (i.e. from 1.0 to 0.1)
The upper level moisture constraint limit is set to 100% relative humidity.
FORECAST AND POST PROCESSING CHANGES
The forecast model now includes prognostic cloud condensate. Fractional
cloud cover is calculated diagnostically from the cloud condensate.
The shortwave radiation is modified to take advantage of predicted cloud
condensate path directly. A new aerosol scheme is also added to the
shortwave radiation with monthly mean climatological aerosol distribution.
The new convection scheme is the multi-cloud version of the SAS
with momentum mixing;
this is the same convection scheme that was in the PRX in September.
- Experiment changes log
- Implementation changes list
- Product changes list
- Background links
- Evaluation of parallel results
Daily forecast maps by Pete Caplan
Daily forecast stats by Pete Caplan
Verification of precipitation by Hua-Lu Pan
Verification against rawinsondes timeseries by Suru Saha
Verification against rawinsondes horizontal maps by Suru Saha
Verification against rawinsondes vertical maps by Suru Saha
Daily forecast maps for Hawaii by Bob Kistler
CAFTI presentation (TDL)
Technical Procedures Bulletin or TPB
Global Parallel Home Page
Page Last Modified: May 21, 2001