Using InterComm Enhanced ESMF To Couple TIME-GCM and CAM

1
Using InterComm Enhanced ESMF To Couple TIME-GCM
and CAM
Robert Oehmke1, Michael Wiltberger1, Alan
Sussman2, Wenbin Wang1, and Norman Lo2
The Coupled System

• TIME-GCM
• Thermosphere-Ionosphere-Mesosphere-Electrodynamic
  s General Circulation Model
• Simulates the circulation, thermal and
  compositional structures from 30-500km
• Gravity waves parameterized based on linear
  saturation theory
• Continuous efforts to compare model results with
  ground and satellite observations
• Grid contains periodic region in addition to
  ghostcells

• CAM to TIME-GCM Coupling
• Takes place at the 10mb pressure level
• Transfers temperature from CAM to TIME-GCM
• Transfers geopotential from CAM to TIME-GCM
• Quantities are regridded via bilinear
  interpolation
• Extra communication to fill periodic region

• Current Status
• The coupled system runs
• The data is transferred correctly from CAM to
  TIME-GCM
• Initial results from the coupled system are
  reasonable in most areas
• The one problem area appears to result from an
  incorrectly set periodic region

1. National Center for Atmospheric Research
2. University of Maryland