Transcript The Brazilian Effort on the Global Model

Center for Weather Forecasting and Climate Studies - CPTEC/INPE
The Brazilian Effort on the
Global Model
By
José Paulo Bonatti
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Global Atmospheric Spectral Model
Origin:
• NMC (USA National Meteorological Center, 1988) - NCEP
• COLA (Center for Ocean-Land-Atmosphere Studies)
• Rhomboidal Version 1.7+1.12 Fortran 77 from COLA
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CPTEC Version:
Triangular CPTEC/INPE
User defined Horizontal and Vertical Resolutions
Sigma at Vertical and Spherical at Horizontal Coordinates
Full Quadratic Gaussian, Reduced and Linear Grids
Optimizations: Vectorization, MPI/OpenMP Paralelism
Fortran 90/95 Features: Dynamical Allocation, Modules, etc
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Global Atmospheric Spectral Model
• Spectral Coeficients Initial Conditions: Topography (Truncated
and Smoothed if desired), Log of Surface Pressure, Virtual
Temperature, Vorticity, Divergence, Specific Humidity
• Grid Initial Sea Surface Temperature: Monthy or Weekly Mean
(Climatological or Observed)
• Grid Initial Soil Moisture: Climatological or Real Time Analysed
• Grid Initial Climatological Fields: Snow, Deep Soil Temperature,
Roughness Length
• Grid Initial Ozone: Climatological Zonal Mean (Interpolated at
Each Time Step) or 3-Dimensional Field Analysis (NCEP)
• Boundary Conditions: Vertical Sigma Velocity Null at Top and
Surface
• CO2 Amount: Fixed Value for All Atmosphere
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Global Atmospheric Spectral Model
• Initialization:
• Diabatic Non-Linear Normal Mode
Spectral Dynamic:
• Primitive Equations (Zonal and Meridional Winds)
• Spectral at Horizontal (Spherical Harmonics) and Finite
Differences at Vertical and Time
• Semi-Implicit Time Integration (Eulerian and 3 Steps SemiLagrangean) and Asselin Filter
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Global Atmospheric Spectral Model
• Physical Processes:
• Surface:
• Land: SSiB (Xue, 1990, SiB - Sellers et al, 1986)
• Ocean: Bulk Aerodynamic Scheme (NCEP, 1988)
• Planetary Boundary Layer:
• Vertical Turbulent Diffusion 2.0 (Mellor and Yamada, 1982)
• Gravity Wave Drag (NCEP, 1988)
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Radiation:
Short Wave Every Hour (Lacis and Hanson, 1974)
Long Wave Every Three Hours (Harshvardhan et al, 1974)
Short Wave CLIRAD (Tarasova, 2006)
Cloud Radiation Interactions (Slingo, 1987)
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Global Atmospheric Spectral Model
• Physical Processes:
• Convection:
• Deep: KUO (Kuo, 1965; Anthes, 1977), RAS (Moorthi & Suarez,
1992) or Grell (2002) From Newest MM5 (Ensemble or Other
Clousure)
• Shallow: Tiedke (1983) or Souza (1999)
• “Adjustments”:
• Large Scale Condensation: NCEP (1988)
• Horizontal Diffusion: Bi-Harmonical Explicit (NCEP, 1988) or 2nHarmonical Implicit (CPTEC, 2002)
• CFL Control: Local Diffusion (COLA/CPTEC, 1995) or
Enhanced Diffusion (ECMWF, 1999)
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Operational Global Model Evolution
• 1994, NEC/SX-3: TQ0062L028 (210 km), CPTEC-COLA, t=1200s,
sequential
• 1998, NEC/SX-4: TQ0062L028 (210 km), CPTEC-COLA, t=1200s,
parallel up to 8 processors, NEC primitives
• 2000, NEC/SX4: TQ0126L028 (105 km), CPTEC-COLA, t=600s,
parallel up to 8 processors, NEC primitives
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2005, NEC/SX6: TQ0213L042 (63 km), CPTEC-OMP, t=400s,
parallel up to 8 processors, portable
• 2007, NEC/SX6: TQ0299L064 (45 km), CPTEC-MPI, t=240s,
parallel up to 32 processors, portable
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Operational Global Models at CPTEC
Two times a day: 00 and 12 UTC:
• TQ0213L042 (63 km) 7 days (NCEP)
• TQ0299L064 (45 km) 7 days (NCEP)
• TQ0213L042 (63 km) 7 days (GPSAS/CPTEC)
• TQ0126L028 (105 km) 30 days (coupled MOM3)
• TQ0126L028 (105 km) 15 days (ensemble 15 members: perturbation
EOF based 45°S, 30°N - perturbed fields: temperature and winds)
• TQ0062L028 (210 km) up to 6 months every month (ensemble
7x15=105 members: different physics (Kuo, RAS, Grell) with SST
forecasted and Persisted Anomaly each physic, and Coupled (RAS)
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
• Goal for the NEC/SX6: run a TL0511L064 (TQ0341L064), 40 km,
CPTEC-MPI-OMP, for 10 days forecasting, portable, using 32
processors in 2h30min.
• The goal was achieved in Setember 2007 with great advantage: it
takes 1h22min, t=720s.
• Then we develop a TL0575L064 (TQ03820L64), 35 km, CPTECMPI-OMP that runs 10 days forecasting using 32 processors,
t=720s, in 1h53min. This is ready for operation, but the suite is
saturated.
• We also devolop a TQ0666L096 (20 km). Runs in NEC/SX6 and in
a NEC/SUN cluster of 1100 processors (275 nodes with 2 dual
core chips - AMD). This model will be operational at the new
machine under bidding. It takes 56min for a day forecast at the
NEC/SX6 using 32 processors, 4 MPI, 8 OpenMP, semiLagrangean time integration and reduced quadratic grid.
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Software Development
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Modernization (Fortran 90/95)
Otimization
Paralelism
Portability
Code: massive paralism (MPI over OpenMP)
Time Integration: Eulerian or Semi-Lagrangean
Grid: Quadratic or Linear; Full or Reduced
Resolution: user defined via namelist
Man Power: 3 men year for 10 years.
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Undergoing Developments
• Radiation Scheme from Unified Model UKMet Office
(Edwards and Slingo, 1996): short and long waves.
• Massive Paralel Version MPI/OpenMP (user “defined”)
• Long Wave CLIRAD
• Atmophere-Ocean Coupled Model: latest version of AGCM
CPTEC/INPE and MON4.
• 2 Steps Semi-Lagrangean Time Integration and Tracers
• Boundary Layer Parameterisation (Hostlag e Boville, 1992)
• Sib 2.5 (Sellers, 1996)
• Dynamical Vegetation IBIS 2.6 (Foley et al, 1996)
Workshop on Weather and Seazonal Climate Modeling at INPE
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08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Undergoing Developments
• New Assimilation System LETKF: Maryland University
• Improvements on CPTEC EPS: perturbation on humidity
and surface pressure, extension of the perturbation area to
middle latitudes, stochastics perturbations on the
tendencies of physical process, lagged forecast using 00
and 12 UTC runs, moving to members defined by LEKF
Assimilation System.
• Chemistry from BRAMS
• Observed Initial Condition for Snow
• Leaf 3.0 From BRAMS
• New Shallow Convection (based on Souza, 1999)
• Arakawa & Schubert Convection
Workshop on Weather and Seazonal Climate Modeling at INPE
-
08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Paralel Computational Performance of the Latest Version
NEC/Sun Cluster Run
Eulerian Time Integration with Reduced Quadratic Grid
Workshop on Weather and Seazonal Climate Modeling at INPE
-
08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Workshop on Weather and Seazonal Climate Modeling at INPE
-
08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Workshop on Weather and Seazonal Climate Modeling at INPE
-
08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Workshop on Weather and Seazonal Climate Modeling at INPE
-
08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Workshop on Weather and Seazonal Climate Modeling at INPE
-
08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Near Future Plan:
• Community Global Model
Future Plan:
• Global Model for Simulate Scenarios of Climate
Changes
Workshop on Weather and Seazonal Climate Modeling at INPE
-
08-10 Dec 2008
Center for Weather Forecasting and Climate Studies - CPTEC/INPE
Thank You
Workshop on Weather and Seazonal Climate Modeling at INPE
-
08-10 Dec 2008