1. Outlines of NICAM NICAM (Nonhydrostatic ICosahedral Atmospheric Model)
Icosahedral grid & Nonhydrostatic model & Explicit cloud physics
Development since 2000: number of test cases
Cloud microphysics instead of cumulus parameterization used for AGCMs
Horizontal resolution: up to dx=3.5km
Global Cloud-system Resolving simulations
Glevel-0
Glevel-1
Glevel-3
Glevel-5

2. Model description Dynamics Governing equations
Fully compressible non-hydrostatic system
(with acoustic waves)
Spatial discretization
Horizontal grid configuration
Vertical grid configuration
Topography
Finite Volume Method
Icosahedral grid
Lorenz grid
Terrain-following coordinate
Conservation
Total mass, total energy
Temporal scheme
Slow mode　－　explicit scheme　（RK2 or RK3）
Fast mode －　Horizontal Explicit Vertical Implicit scheme
Physics: Same as MIROC2.0 except for explicit cloud physics
Turbulence, surface flux
Mellor & Yamada 2,2.5,3(plan)/Louis(1979), Uno et al.(1995)
Radiation
MSTRNX (Sekiguchi and Nakajima, 2005)
Cloud physics
Kessler; Grabowsky(1998,1999); Lin et al.(1983); NSW6(Tomita 2007), WSM3-6, bin(plan)
Shallow clouds
Moist-MY
Cloud parameterization
Prognostic AS, Kuo, LS condensation (>30km-mesh);
KF, Grell, Yamasaki (plan) (<30km-mesh)
Land process
Mixed layer/bucket; MATSIRO

3. Initial condition: 2004/04/01 0UTC, 7 days simulation with 3.5km-mesh
Apr short term exp.
GOES9
NICAM gl11 (3.5km-mesh)
(Left) An infrared image from GOES-9 at 00:00 UTC on 6 April and (Right) the outgoing
long-wave radiation for DX-3.5 averaged over 90 min, which corresponds to the period
between 00:00 UTC and 01:30 UTC on 6 April. Miura et al.(2006,GRL,submitted)
Initial condition: 2004/04/01 0UTC, 7 days simulation with 3.5km-mesh
2004/04/06 00UTC

4. Perpetual July exp. precipitation
GCM experiments with realistic land/sea distribution
Perpetual July exp.
Cess et al.-type climate sensitivity (CFMIP)
14km-mesh exp. 200 days, 7km-mesh, 40days
TRMM Jul. 2004
NICAM 14km one-month precip.
Iga et al.(2007)