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Chapter 5. Convection
IFS documentation Front Page
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
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5.10 Structure of code
The parametrization of cumulus convection is performed in subroutines shown in Fig. 5.1 .
CUCALLN
Provides interface of routines for cumulus parametrization. It takes the input values through arguments from CALLPAR and returns updated tendencies of
and 
, as well as convective precipitation rates.CUMASTRN
Master routine for convection scheme.
CUININ
Initializes variables for convection scheme (including vertical interpolation to the half model levels).
CUBASEN
Calculates condensation level for surface air and sets updraught base variables.
CUASCN
Calculates ascent in updraughts. CUASCN is called twice, the second time after downdraughts have been calculated taking account of the CAPE adjustment closure for deep convection and downdraughts for mid-level and shallow convection Routines CUENTR and CUBASMCN are called from CUASCN.
CUENTR
Calculated entrainment and detrainment rates.
CUBASMCN
Calculates cloud base properties of mid-level convection.
CUDLFSN
Calculates the level of free sinking for downdraughts.
CUDDRAFN
Calculates the downdraught descent.
CUFLXN
Calculates final convective fluxes and surface precipitation rates taking into account of melting/freezing and the evaporation of falling precipitation.
CUDTDQN
Calculates the tendencies of
from convection.CUDUDV
Calculates the tendencies of
from convectionCUADJTQ
Calculates super/sub saturation and adjusts T and q accordingly.
EXTERNALS
Subroutine SATUR for calculating saturation mixing ratio.
PARAMETERS
Defined in subroutine SUCUM called from INIPHY.
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05.04.2002 |
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