1. Forecast system version

Identifier code: GEM5-NEMO

First operational forecast run: November 30, 2021

2. Configuration of the forecast model

Is the model coupled to an ocean model?   Yes

Coupling frequency: every 1/2 hour

2.1 Atmosphere and land surface

ModelGEM
Horizontal resolution and grid

283×190 YY-grid points (~110 km)

Atmosphere vertical resolution85 levels
Top of atmosphere0.1 hPa
Soil levels (layers)

2

Layer 1: 0 - 10 cm 
Layer 2: 10 - 280 cm 

Time step30 minutes

Detailed documentation:    Lin, H., R. Muncaster, G. T. Diro, W. J. Merryfield, G. Smith, M. Markovic, A. Erfani, V. V. Kharin, W.-S. Lee, R. Parent, R. Pavlovic, and M. Charron, 2021: The Canadian Seasonal to Interannual Prediction System version 2.1 (CanSIPSv2.1). Canadian Meteorological and Environmental Prediction Centre technical note, Environment and Climate Change Canada. (https://collaboration.cmc.ec.gc.ca/cmc/cmoi/product_guide/docs/tech_notes/technote_cansips-210_e.pdf)

2.2 Ocean and cryosphere

Ocean modelNEMO
Horizontal resolution1°×1° (1/3 degree meridionally near the equator)
Vertical resolution50 levels
Time step30 minutes
Sea ice modelCICE
Sea ice model resolutionSame as NEMO
Sea ice model levels5 ice-thickness categories
Wave modelN/A
Wave model resolutionN/A

Detailed documentation:

3. Initialization and initial condition (IC) perturbations

3.1 Atmosphere and land


HindcastForecast
Atmosphere initialization
ERA-5GEPS
Atmosphere IC perturbationsRandom isotropic perturbationsEnsemble Kalman Filter

Land Initialization

Off-line Surface Prediction System (SPS)

forced by ERA-5

SPS forced by the CCMEP analysis
Land IC perturbationsNoneNone
Soil moisture initialization

Off-line Surface Prediction System (SPS)

forced by ERA-5

SPS forced by the CCMEP analysis
Snow initialization

Off-line Surface Prediction System (SPS)

forced by ERA-5

SPS forced by the CCMEP analysis
Unperturbed control forecast?nonenone

Data assimilation method for control analysis: 

Horizontal and vertical resolution of perturbations:  

Perturbations in +/- pairs: 

Detailed documentation:

3.2 Ocean and cryosphere


HindcastForecast
Ocean initializationORAS5CCMEP GIOPS analysis
Ocean IC perturbationsNoneNone
Unperturbed control forecast?NoneNone

Detailed documentation:


4. Model Uncertainties perturbations:

Model dynamics perturbationsNone
Model physics perturbations
  • Stochastic perturbation of 18 parameters (SPP).
  • Modified parameter values and ranges are based on simulated climatology and variability (e.g., tropical waves) and forecast skill

If there is a control forecast, is it perturbed?

No

Detailed documentation: 

5. Forecast system and hindcasts

Forecast frequencyonce a month
Forecast ensemble size10
Hindcast years1990-2020
Hindcast ensemble size10
On-the-fly or static hindcast set?static

6. Other relevant information

7. Where to find more information