Primary Author: Norton, Warwick Additional Authors: Len Shaffrey, Pete Innes, Kevin Hodges, James Harle
Simulation of Tropical Variability in HiGEM
Warwick Norton, Len Shaffrey, Pete Innes, Kevin Hodges(1), James Harle(2)
(1) Walker Institute, University of Reading, UK
(2) National Oceanography Centre, Southampton, UK
HiGEM is a new high resolution climate model based on the Hadley Centre HadGEM model where the resolution has been increased to 1 degree in the atmosphere and 1/3 degrees in the ocean. Comparison with the equivalent HadGEM model (1.5 degree atmosphere and 1 degree ocean) is examined to assess the impact of increased resolution on tropical variability including the representation of tropical weather systems, cyclones and the simulation of the MJO. HiGEM reproduces the local-air sea coupling associated with tropical instability waves as observed by QuikSCAT. Implications this could have for the mean state of the tropical East Pacific are discussed.
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