Changeset 544 for trunk/LMDZ.MARS/README

Timestamp:

Feb 27, 2012, 10:44:32 AM (13 years ago)

Author:

acolaitis

Message:

27/02/12 == AC

Continuation of thermals setting, comparisons with mesoscale results on Case C
Added possibility to call gcm (or 1d) with constant prescribed sensible heat flux, in the spirit of direct comparisons with LES

... This is directly comparable to the variable tke_heat_flux in namelist.input
... Requires the use of yamada4.F from terrestrial GCM (mixes more, seem more numerically stable)
... Usually requires high timesteps (>1000) to avoids crashes. Best approach is to compare
height of first model level z1 and teta_1 between LES and 1D, and increase the timesteps until results
between the two models are comparable (might require a slitghly different tke_heat_flux between the two models
due to difference in vertical diffusion schemes and subgrid effects)
... Syntax for use is to add "tke_heat_flux = ..." in callphys.def

Corrected some stuff with tke transport in thermals (which is anyway deactivated but one day maybe...)

File:

• trunk/LMDZ.MARS/README (modified) (1 diff)

trunk/LMDZ.MARS/README

@@ -1414 +1414 @@
 >> Code about 10% faster [tests carried out with mesoscale summer Tharsis run]
 >> Check with a GCM run that results similar
+
+== 27/02/12 == AC
+>> Continuation of thermals setting, comparisons with mesoscale results on Case C
+>> Added possibility to call gcm (or 1d) with constant prescribed sensible heat flux, in the spirit of direct comparisons with LES
+   ... This is directly comparable to the variable tke_heat_flux in namelist.input
+   ... Requires the use of yamada4.F from terrestrial GCM (mixes more, seem more numerically stable)
+   ... Usually requires high timesteps (>1000) to avoids crashes. Best approach is to compare
+   height of first model level z1 and teta_1 between LES and 1D, and increase the timesteps until results 
+   between the two models are comparable (might require a slitghly different tke_heat_flux between the two models
+   due to difference in vertical diffusion schemes and subgrid effects)
+   ... Syntax for use is to add "tke_heat_flux = ..." in callphys.def
+>> Corrected some stuff with tke transport in thermals (which is anyway deactivated but one day maybe...)