1. Forecast system version
Identifier code: CFSv2
First operational forecast run: March 2011
2. Configuration of the forecast model
Is the model coupled to an ocean model? Yes
Coupling frequency: One hour
2.1 Atmosphere and land surface
Model | NCEP Global Forecast System |
---|---|
Horizontal resolution and grid | T128 (~ 1x1 Deg Lat/Lon) |
Atmosphere vertical resolution | 64 Levels (sigma-pressure hybrid coordinates) |
Top of atmosphere | 0.02 hPa |
Soil levels | Four |
Time step | 20 minutes |
Detailed documentation:
2.2 Ocean and cryosphere
Ocean model | GFDL MOM4 |
---|---|
Horizontal resolution | Spatial resolution in the zonal direction of 0.5° and in the meridional direction, 0.25° from 10°S to 10°N, progressively decreasing to 0.5° from 10° to 30°, and is fixed at 0.5° beyond 30° in both hemispheres. |
Vertical resolution | 40 Layers |
Time step | 1 hour |
Sea ice model | GFDL Sea Ice Simulator (part of GFDL MOM4 ocean model) |
Sea ice model resolution | |
Sea ice model levels | |
Wave model | Not Applicable |
Wave model resolution | Not Applicable |
Detailed documentation:
3. Initialization and initial condition (IC) perturbations
3.1 Atmosphere and land
Hindcast | Forecast | |
---|---|---|
Atmosphere initialization | Every 5th day of the calendar month from Climate Forecast System Reanalysis (CFSR) | Everyday from Climate Forecast System Reanalysis (CFSR) |
Atmosphere IC perturbations | ||
Land Initialization | ||
Land IC perturbations | ||
Soil moisture initialization | ||
Snow initialization | ||
Unperturbed control forecast? |
Data assimilation method for control analysis:
Horizontal and vertical resolution of perturbations:
Perturbations in +/- pairs:
Detailed documentation:
3.2 Ocean and cryosphere
Hindcast | Forecast | |
---|---|---|
Ocean initialization | CFSR | CFSR |
Ocean IC perturbations | ||
Unperturbed control forecast? |
Detailed documentation:
4. Model Uncertainties perturbations:
Model dynamics perturbations | No |
---|---|
Model physics perturbations | No |
If there is a control forecast, is it perturbed? | No |
Detailed documentation:
5. Forecast system and hindcasts
Forecast frequency | Every day |
---|---|
Forecast ensemble size | Four/day |
Hindcast years | 1981-2010 |
Hindcast ensemble size | Four/day |
On-the-fly or static hindcast set? | Static hindcast |
Calibration (bias correction) period | 1981-2010 |
6. Other relevant information
7. Where to find more information
Comprehensive description of the model physics:
Ek, M. B., K. E. Mitchell, Y. Lin, E. Rogers, P. Grunmann, V. Koren, G. Gayno, and J. D. Tarplay, 2003: Implementation of Noah land surface model advances in the National Centers for Environmental Prediction operational mesoscale Eta model. J. Geophys. Res., 108, 8851, doi:10.1029/2002JD003296.
Saha, S., and Coauthors, 2010: The NCEP Climate Forecast System Reanalysis. Bull. Amer. Meteor. Soc., 91, 1015.1057. doi: 10.1175/2010BAMS3001.1
Saha, S. and Coauthors, 2014: The NCEP Climate Forecast System Version 2 J. Climate, 27, 2185–2208. doi: http://dx.doi.org/10.1175/JCLI-D-12-00823.1
http://www.ral.ucar.edu/research/land/technology/lsm/noah/Noah_LSM_USERGUIDE_2.7.1.pdf
Zobler, L. 1986. A World Soil File for Global Climate Modelling. NASA Technical Memorandum 87802. NASA Goddard Institute for Space Studies, New York, New York, U.S.A.