# Presentation: 114207

## Recent implementations& planned work at theCanadian Meteorological Centre 

- Michel Béland
- Meteorological Service of Canada

## SPACE

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

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

- Global Environmental Multiscale
- Forecasting & Modeling System

**SPACE**

**TIME**

- Middle Atmosphere

- Medium-range

- Regional
- (Continental)

- Mesoscale
- (Sub-continental)

- LAM

- Ensemble

- Monthly

- Seasonal

- Climate

- Regional Climate

## 	Variable 		   Uniform

- 	Variable 		   Uniform

-  Rotated

- Limited
- Area

## 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

## 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

## Ensemble Prediction System

- Present status

- Planned upgrade

- 16 members @ 300  150  28
-  Resolution of 1.5o (~150 km)
-  10 days @ 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

- Ensemble Kalman Filter
- raw radiances (AMSU-A,B)
- 15 days @ 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

## 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)

## Mesoscale System

- Present status

-  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

- Initialised by 6 hour forecast from the regional model

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

- Planned status

## 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

## GEM Domain