COBEL:
A one-dimensional boundary layer model for ceiling and visibility forecasting
Scientific description

 Table of contents 

Preface

1 INTRODUCTION

2 MODEL PHYSICS

2.1 General model formulation

2.2 Parameterizations

2.2.1 Turbulence closure

2.2.2 Microphysics

2.2.2.1 Gravitational settling

2.2.2.2 Precipitation (drizzle)

2.2.3 Soil-atmosphere exchanges

2.2.4 Soil model

2.2.5 Radiative fluxes

• 2.2.5.1 Longwave radiation
• 2.2.5.2 Shortwave radiation
  • a) Overview of the parameterization scheme
  • b) Implementation of the Fouquart and Bonnel scheme

3 MODEL NUMERICS

3.1 Grid

3.2 Boundary conditions

3.3 Numerical methods

3.4 Initialization

4 EXTERNAL PARAMETERS

4.1 Horizontal advection

4.2 Geostrophic wind

4.3 Vertical motion

4.4 Pressure tendencies

4.5 Horizontal advection of pressure

4.6 IR "high cloud flux"

REFERENCES

Appendix A (Model grid)

Appendix B (List of symbols)

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