GFDL - Geophysical Fluid Dynamics Laboratory

ARM/GCSS TWP-ICE NWP Intercomparison Study

Background

GCSS and ARM have organized several model intercomparison projects in recent years. Tropical Warm Pool - International Cloud Experiment (TWP-ICE) collected an unprecedented wealth of observations for various model evaluations. The NWP intercomparison project is part of a series of intercomparison projects involving cloud resolving models (CRMs), limited area models (LAMs) and single column models (SCMs). It is based on the framework of DOE Climate Change Prediction Program (CCPP) initiative (CCPP-ARM Paramterization Testbed CAPT).

Motivations

• How do GCMs perform given realistic large scale initialization?
• What are the systematic bias in GCM simulations of tropical deep convection and ice clouds using CAPT approach?
• How does model performance vary under different dynamic regimes (active and suppressed monsoon period)?
• How does model simulation compare with SCM results, which does not have the feedback to large-scale forcing?
• How does cloud and precipitation systematic bias related with deep convection parameterization and large-scale cloud scheme used?
  

Case Specifications

Time period

• 00UTC 18 Jan to 00UTC 14 Feb with focus on some sub-periods
  

Forcing data

• ECMWF analyses

Deadline

• Results are required to be submitted by 1st Oct 2009, but results submitted before 1st Sep 2009 will be included in a preliminary intercomparison presented in the fall ARM group meeting

Click Document to download the intercomparison document!
Document
Contact: Yanluan.Lin@noaa.gov