Home page  
Home   Your Room   Login   Contact   Feedback   Site Map   Search:  
Discover this product  
About Us
Overview
Getting here
Committees
Products
Forecasts
Order Data
Order Software
Services
Computing
Archive
PrepIFS
Research
Modelling
Reanalysis
Seasonal
Publications
Newsletters
Manuals
Library
News&Events
Calendar
Employment
Open Tenders
   
Home > Research > Ifsdocs > PHYSICS >  
   

Chapter 6. Clouds and large-scale precipitation

IFS documentation Front Page


Table of contents



Chapter 1. Overview

Chapter 2. Radiation

Chapter 3. Turbulent diffusion and interactions with the surface

Chapter 4. Subgrid-scale orographic drag

Chapter 5. Convection

Chapter 6. Clouds and large-scale precipitation

Chapter 7. Land suface parametrization

Chapter 8. Methane oxidation

Chapter 9. Climatological data

REFERENCES


 
  Next Section
Previous Section


6.3 Code




The parametrization of cloud and large-scale precipitation processes is performed in the following routines:


CLDPP


This routine prepares the cloud variables for radiation calculations and calculates total, high, mid-level and low cloud cover for postprocessing.


CLOUDSC


This routine carries out all calculations necessary to solve Eq. (6.9) and Eq. (6.10). The calculations are carried out in the following order:
  •   initial setup including calculation of
  •  
  •   tropopause height for Eq. (6.22)
  •   mixed layer buoyancy integral as defined in Eq. (6.35)
  •   convective source terms including freezing if different mixed phase assumptions are used for convection and large-scale processes (Eq. (6.13) and Eq. (6.14))
  •   entrainment velocity due to longwave cooling (Eq. (6.36))
  •   generation of clouds at top of convective boundary layer (Eq. (6.17) and Eq. (6.18))
  •   erosion of clouds by turbulent mixing (Eq. (6.29) and Eq. (6.31))
  •   calculation of (see section 6.2.2)
  •   large-scale evaporation (Eq. (6.27))
  •   large-scale cloud formation (Eq. (6.21), Eq. (6.24), and Eq. (6.25))
  •   analytical integration of the equation for (Eq. (6.59))
  •   moist adjustment (see section 6.2.9)
  •   analytical integration of the equation for (Eq. (6.60)) and precipitation (Eq. (6.37) to Eq. (6.56) and Eq. (6.65) to Eq. (6.86)).
  •   melting of snow (Eq. (6.56))
  •   evaporation of precipitation (Eq. (6.54))
  •   final tendency calculations
  •   mixing due to cloud top entrainment (Eq. (6.91) and Eq. (6.92))
  •   flux calculations for diagnostics


Next Section
Previous Section



 

Top of page 05.04.2002
 
   Page Details         © ECMWF
shim shim shim