Documentation of the Changes in INT2LM
Version 2.09

02.06.2021

Contents:

  1. Unification between COSMO and INT2LM utility modules
  2. Added new external parameters for urban parameterizatio
  3. Technical Changes and Bug Fixes
  4. Changes in the Namelists
  5. Changes of the Results

1. Unification between COSMO and INT2LM utility modules

(by Astrid Kerkweg)

Some latest modifications to COSMO utility modules have been ported to INT2LM:

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2. Added new external parameters for urban parameterization

(by Mikhail Varentsov, Ulrich Schättler)

Several external parameters have been added to describe additional urban parameters:

shortnameExplanation
URB_FR_BLDBuilding area fraction with respect to urban tile
URB_H2W Street canyon H/W ratio
URB_H_BLD Building height
URB_ALB_THUrban material thermal albedo (1 - emissivity)
URB_ALB_SOUrban material solar albedo
URB_HCAP Volumetric heat capacity of urban material
URB_HCON Heat conductivity of urban material

For every field there is a new namelist switch, whether this field should be read from the external parameter data set:

Group Name Meaning Default
/CONTRL/ lurb_fr_bld NEW if .TRUE., run with building area fraction .FALSE.
lurb_h2w NEW if .TRUE., run with street canyon H/W ratio .FALSE.
lurb_h_bld NEW if .TRUE., run with building height .FALSE.
lurb_alb_th NEW if .TRUE., run with thermal albedo .FALSE.
lurb_alb_so NEW if .TRUE., run with solar albedo .FALSE.
lurb_hcap NEW if .TRUE., run with heat capacity .FALSE.
lurb_hcon NEW if .TRUE., run with heat conductivity .FALSE.

If a namelist switch is set to .TRUE. the corresponding field will be read from the external parameter data set and written to the initial file for the COSMO-Model.

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3. Technical Changes and Bug Fixes

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4. Changes of the Namelists

The following namelist variables have been added in /CONTRL/

Group Name Meaning Default
/CONTRL/ lurb_fr_bld NEW if .TRUE., run with building area fraction .FALSE.
lurb_h2w NEW if .TRUE., run with street canyon H/W ratio .FALSE.
lurb_h_bld NEW if .TRUE., run with building height .FALSE.
lurb_alb_th NEW if .TRUE., run with thermal albedo .FALSE.
lurb_alb_so NEW if .TRUE., run with solar albedo .FALSE.
lurb_hcap NEW if .TRUE., run with heat capacity .FALSE.
lurb_hcon NEW if .TRUE., run with heat conductivity .FALSE.

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5. Changes of the Results

NONE

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