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Analysis of an AMIP Run with the Super-CAM
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Analysis of an AMIP Run with the Super-CAM
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Analysis of an AMIP Run with the Super-CAM
P.I.s
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Acknowledgement
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+ = ?
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2.8°
2.8° ~ 300 km
GCM grid column
Multi-Scale Modeling Framework (MMF)
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2.8°
2.8° ~ 300 km
GCM grid column
64 CRM columns x 4 km = 256 km
Periodic lateral boundary conditions
Multi-Scale Modeling Framework (MMF)
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2.8°
2.8° ~ 300 km
GCM grid column
64 CRM columns x 4 km = 256 km
Periodic lateral boundary conditions
Multi-Scale Modeling Framework (MMF)
This idea was proposed and first tested by Wojciech Grabowski.
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GCMNCAR CAM3 Semi-Lagrangian DyCore
T42 (2.8ox2.8o), L30, dt=1800 sec
ALL cloud, PBL, SGS parameterizations are switched off
Super-ParameterizationCSU SAM Cloud Resolving Model (8192 copies)
Anelastic dynamics
Prognostic water/ice static energy, total non-precipitating and total precipitating water
Condensate and hydrometeor partitioning as f(T)
Smagorinsky SGS closure
2-D domain (S-N orientation), 32 x 28 grid, dx = 4 km, dt = 20 sec
Radiation transfer for each CRM column (every 900 sec)
Performance
1024 PEs of IBM-SP ‘Seaborg’ at NERSC
~ 920-fold speedup relative to one processor
~ 10 simulated months per wall-clock day
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AMIP-style experiment
Prescribed monthly-mean observed SST and ice
September 1985 to August 2001 (16 years)
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Low Clouds
ISCCP (1986-2000) MMF (1986-2000)
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High Clouds
ISCCP (1986-2000) MMF (1986-2000)
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IWC (15 year-mean) @147 hPaE
CM
WF
MLS
CS
UM
MF
Annual January July
Jui-Lin Li, JPL
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EN-LN Longwave Cloud Effect
MMFISCCP-FD
EN-LN Shortwave Cloud EffectMMFISCCP-FD
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EN-LN Column Water Vapor
MMFNVAP
EN-LN PrecipitationMMFCMAP
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Precipitation EOFs
EOF1 EOF1
EOF2 EOF2
CMAP MMF
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Precipitation Principal Components
EOF1
EOF2
EOF1
EOF2
CMAP MMF
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Subseasonal Variability
Wheeler and Kiladis (1999) procedure was followed:
Daily data
96-day long segments, overlapping by 2 months
Annual, seasonal cycles, and mean removed
Detrended, ends of series tapered to zero
Complex FFT applied in time and space for each lat
Equatorial belt from 15oS to 15oN
Background spectrum is computed by smoothing
Spectrum/background ratio plotted to reveal disturbances
Analysis applied to OLR, Precip, PW, U200, U850, for both observations and model output
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MMF
Outgoing Longwave RadiationNOAA
GPCP
Precipitation
12
25
50
MMF
CAM3
CAM3
Outgoing Longwave Radiation
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MJO OLR Variance
MMFNOAA
DJF
JJA
Ann
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Kelvin-Wave OLR Variance
MMFNOAA
DJF
JJA
Ann
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MJO-Filtered OLR Variance
OBS (NOAA OLR)
MMF OLR
W2 /m4
W2 /m4
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+ = ?
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Continue testing prototype MMFAnalysis of surface energy budgetTest of mini-LES and other PBL improvementsCoupled run
Geodesic prototype MMFSimilar basic design but different dynamical coreCurrently being debuggedLand-surface model inside cloud model
Second-generation MMFQuasi-3DRadical designConcept being tested in regional framework
Global cloud-resolving model
+ = ?