Tropical performance of the CCSR Coupled GCM

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Tropical performance of the CCSR Coupled GCM

• Masahide Kimoto
• Center for Climate System Research
• University of Tokyo
• in collaboration with
• All the CCSR-family members

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CCSR Coupled Model
MIROC2.1

• Atmosphere
• CCSR/NIES AGCM v5.6
• Nakajima et al. (2000) radiation (2 stream
  DOM/adding)
• Simplified Arakawa-Schubert
• Le Treut-Li prognostic cloud
• Bucket land surface
• Grid advection for tracers (FFSL Flux Form
  Semi-Lagrangian/van Leer)
• Mellor-Yamada lvl2.0 (optional) non-local PBL,
  cloud-top entrainment instability
• MacFarlane GWD
• Ocean
• COCO (CCSR Ocean Component Model
  http//www.ccsr.u-tokyo.ac.jp/hasumi/COCO/)
• Rigid-lid, vertical-z
• UTOPIA tracer advection
• Isopycnal diffusion/Gent-McWilliams eddy-iunduced
  tracer transport
• Noh Kim mixed layer
• Nakano-Suginohara bottom boundary layer
  parameterization
• Sea Ice
• Semtner 0-layer thermodynamics EVP rheology

No flux correction applied
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Obs.
CGCM
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Present version
Previous version
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OLR
Obs.
CGCM
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Seasonal Cycle of SST
Obs.
CGCM
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Seasonal Cycle of Rain
Obs.
CGCM
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Obs.
CGCM
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EOFs of Vertically Integrated Moisture Flux Vector
Mode 1
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Present Version
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Some modifications for better upper-ocean
temperature profile
CTL
OBS
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CTL
EXP III
OBS
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Obs.
CTL
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Increase/decrease low-level clouds
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Coupled
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Hi-CGCM
OBS
?
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Seasonal Cycle of Rain
Obs.
Hi-CGCM
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Seasonal Cycle of Rain
Obs.
Mid-CTL