IFS Documentation front page

I Observations
II Assimilation
III Dynamics
IV Physics
V Ensemble
VI Technical
VII Waves

Part II: Data assimilation

CHAPTER 3 4D variational assimilation

Table of contents

3.1. Introduction

3.2. Organization of data in time slots

3.2.1 Observation preprocessing.

3.2.2 Inside IFS.

3.2.3 Observation screening in 4D-Var

3.3. Inner and outer loops: practical implementation

3.4. Tangent linear physics

3.4.1 Set-up

3.4.2 Mixed-phase thermodynamics

3.4.3 Vertical diffusion

3.4.4 Sub-grid scale orographic effects

3.4.5 Large-scale precipitation

3.4.6 Long-wave radiation

3.4.7 Deep moist convection

3.4.8 Trajectory management