IFS documentation (CY23r4)

 

I. Observation processing

1. Non-IFS observation processing (OBSPROC): General overview
2. Observations: Types, variables and error statistics
3. CMA creation (MAKEMA)
4. The FEEDBACK task
5. The TOOLS task
6. Central memory array (CMA) structure/format
7. BUFR feedback data structure/format
8. SIMULATED observations data structure/format
9. NAMELISTS
10. Processing of scatterometer data
References

Click here to download a ps or pdf file

II. Data assimilation

1. Incremental formulation of 3D/4D variational assimilation - an overview
2. 3D variational assimilation
3. 4D variational assimilation
4. Background term
5. Conventional observational constraints
6. Satellite observational constraints
7. Background, analysis and forecast errors
8. Gravity-wave control
9. Data partitioning (OBSORT)
10. Observation screening
11. Analysis of snow
12. Land surface analysis
13. Sea surface temperature and sea-ice analysis
14. Reduced-rank Kalman filter
References

Click here to download a ps or pdf file

III. Dynamics and numerical procedures

1. Introduction
2. Basic equations and discretization
3. Semi-Lagrangian formulation
4. Computational details
References

Click here to download a ps or pdf file

IV. Physical processes

1. Overview
2. Radiation
3. Turbulent diffusion and interactions with the surface
4. Subgrid-scale orographic drag
5. Convection
6. Clouds and large-scale precipitation
7. Land surface parametrization
8. Methane oxidation
9. Climatological data
References

Click here to download a ps or pdf file

V. The Ensemble Prediction System

1. Theory
2. Computational details
References

Click here to download a ps or pdf file

VI. Technical and computational procedures

1. Technical overview
2. FULL-POS post-processing and interpolation
3. Parallel implementation
References

Click here to download a ps or pdf file

VII. ECMWF wave model

1. Introduction
2. The kinematic part of the energy balance equation
3. Parametrization of source terms and the energy balance in a growing wind sea
4. An optimal interpolation scheme for assimilating altimeter data into the WAM model
5. Numerical scheme
6. The WAM-model software
7. Wind-wave interaction at ECMWF
References

Click here to download a ps or pdf file