IFS documentation CY36r1

I. Observation processing

See the Observation Data Base documentation.

II. Data assimilation

1. Overview
2. 4D variational assimilation
3. 3D variational assimilation (with the first-guess at appropriate time)
4. Background term
5. Observational operators and the observation cost function (Jo)
6. Background, analysis and forecast errors
7. Gravity-wave control
8. Diagnostics
9. Observation processing
10. Observation screening
11. Land-surface analysis
12. Analysis of sea-ice concentration and sea surface temperature
13. Data flow
References

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III. Dynamics and numerical procedures

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

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IV. Physical processes

1. Overview
2. Radiation
3. Turbulent diffusion and interactions with the surface
4. Subgrid-scale orographic drag
5. Non-orographic gravity wave drag
6. Convection
7. Clouds and large-scale precipitation
8. Surface parametrization
9. Methane oxidation
10. Ozone chemistry parametrization
11. Climatological data
References

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V. Ensemble Prediction System

1. Theory
2. Computational details: initial perturbations.
3. Computation details: non-linear integrations.
References

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VI. Technical and Computational Procedures

1. Structure, data flow and standards
2. Parallel implementation
Appendices

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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. Data assimilation in WAM
5. Numerical scheme
6. WAM model software pakcage
7. Wind wave interaction at ECMWF
8. Extreme wave forecasting
References

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