Global Parallel Experiment Log

Experiment Name

Minor Model Changes for Summer 2001

Parallel Slot

PRX

Control Slot

MRF

Start date of parallel experiment

2001/06/15/06

End date of parallel experiment

2001/08/16/00

Environmental Modeling Center scientists

Shrinivas Moorthi, Ken Campana, Peter Caplan, Yu-Tai Hou, Mark Iredell, Hua-Lu Pan, Suru Saha, Russ Treadon, Glenn White

Abstract (including Motivation, Hypothesis and Method)

A number of minor fixes to the operational global model are slated for implementation in 2001. The motivations for these changes are

to fix some bugs and tune some parameters.

improved analysis
OBSERVATIONAL AND ANALYSIS CHANGES
Analysis of sea ice is improved by fixing some minor problems near land ocean boundary.
FORECAST AND POST PROCESSING CHANGES
Minor corrections are made to gravity wave drag, random cloud types in the convection, and evaporation with trace snow on the ground. Small modification to autoconversion rate for ice is done to reduce light precipitation. Effective radius for ice crystals is calculated empirically based on observations of Heymsfield and McFarquhar (1996). Evaporation of falling precipitation is also slightly increased. Critical relative humidity for condensation is now made to be a function of resolution.

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

Conclusion

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