Recent implementations

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Recent implementations planned work at
theCanadian Meteorological Centre

• Michel Béland
• Meteorological Service of Canada

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• Uniform resolution
• Variable resolution
• Hydrostatic
• Non-hydrostatic
• Global
• Limited-area
• Distributed memory

Global Environmental Multiscale Forecasting
Modeling System
Seasonal
Middle Atmosphere
SPACE
Climate
Monthly
Medium-range

• 3D Var Data assimilation
• 4D Var Data assimilation
• Emergengy response
• Volcanic ashes
• Operational forecasts
• Air quality
• Stratospheric ozone
• Wave model
• Coupling to hydrology
• Coupling to oceanology
• Simulations
• Climate ...

Ensemble
Regional (Continental)
Mesoscale (Sub-continental)
Regional Climate
LAM
TIME
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Limited Area
Variable Uniform
Rotated
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Regional System
Uniform window covering North America 3D-Var
Regional assimilation cycle
Planned upgrade (2004)

• 576 ? 641 ? 58 Total
• (250 cpu IBM 1 h)
• 0.15º (15 km)
• Kain-Fritsch convection
• 4 runs per day
• AMSU-B and GOES
• profilers, MODIS winds
• QuickScat

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Global Model
Present status
Planned upgrade

• 400 ? 200 ? 28 (uniform)
• Resolution of .9º (100 km)
• 3D-Var at T108 on model levels
• 6-hr cycle
• raw radiances (AMSU-A,B and GOES)
• Kuo Convection
• Sundqvist stratiform scheme
• Force-restore with climatogical HS
• SGO

• 800 ? 600 ? 58 (uniform)
• Resolution of .3º (35 km)
• 4D-Var assimilation, 6-hr window
• 3 outer loops at full model resolution
• inner loops at T108
• equivalent of a 5-day forecast
• profilers, MODIS winds, QuickScat
• Regional physics

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Ensemble Prediction System
Present status
Planned upgrade

• Ensemble Kalman Filter
• raw radiances (AMSU-A,B)
• 15 days _at_ 00Z and 12Z
• GEM
• 2005
• 400 ? 200 ? 58
• Resolution to 100 km
• 32 members
• Data as in global system
• 2007
• Prototype regional ensemble
• 10 members LAM
• 500 ? 500 ? 58
• Start from global EPS

• 16 members _at_ 300 ? 150 ? 28
• Resolution of 1.5º (150 km)
• 10 days _at_ 00Z
• Perturbed OI, 6-hr cycle
• Derived radiances (Satems)
• SEF and GEM
• spaghetti plots
• probability of precipitation
• surface temperature in Canada
• ten-day mean temperatures

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4D-Var

• Use more asynoptic data (aircraft, surface data,
  ATOVS, GOES, SSM/I)
• Same framework used for computation of singular
  vectors (M. Buehner and A. Zadra)
• Changes to the background-error covariances on
  4D-Var analyses and forecasts (M. Buehner)
• Improvement of simplified physics (Mahfouf,
  Laroche)

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Mesoscale System
Initialised by 6 hour forecast from the regional
model
Present status
Planned status

• 2004
• Prototype GEM limited-area
• 500 ? 500 ? 45
• 2.5 km over one area
• 2005
• 5 Limited areas
• 2008
• 4D data assimilation

• Variable resolution
• uniform region at 10 km
• 2 windows, 290 ? 371 ? 35
• HIgh resolution Model
• Application Project
• Mixed phase condensation
• Kain-Fritsch convection
• 2 times /day at 06Z and 18Z

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Mesoscale GEM Setup

• 2.5 km (0.0225?) horizontal resolution
• 43 vertical hybrid levels to 10 hPa
• hydrostatic (initially)
• 40 s / 75 s time step
• Explicit condensation Kong Yau
• Deep convection none
• Shallow convection Clef / Conres
• Surface scheme ISBA
• 12 hour forecasts
• Initialised with operational (24 km) analysis
• Southern and central British Columbia

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GEM Domain