Changes between Version 277 and Version 278 of doc/app/initialization_parameters

Timestamp:

Apr 7, 2016 12:58:11 PM (9 years ago)

Author:

hoffmann

Comment:

--

doc/app/initialization_parameters

@@ -58 +58 @@
 }}}
 {{{#!td style="vertical-align:top"
-'' 'seifert_beheng' ''
-}}}
-{{{#!td
-Parameter to choose microphysics for bulk cloud physics (consequently, [#cloud_physics cloud_physics] = .TRUE.).\\\\ 
+'' 'saturation_adjust' ''
+}}}
+{{{#!td
+Parameter to choose microphysics for bulk cloud physics (which requires [#cloud_physics cloud_physics] = .TRUE.).\\\\ 
 The following values are allowed:\\\\
-'' 'seifert_beheng' ''\\\\
-      Two-moment cloud microphysics according to Seifert and Beheng (2006). Steering parameters: [#c_sedimentation c_sedimentation], [#drizzle drizzle], [#limiter_sedimentation limiter_sedimentation], [#nc_const nc_const], [#precipitation precipitation], [#turbulence turbulence], [#ventilation_effect ventilation_effect]\\\\
+'' 'saturation_adjust' ''\\\\
+      Simple saturation adjustment scheme (also known as 0%-or100% scheme), in which a grid volume is either saturated or subsaturated. Supersaturations are instantaneously condensed to liquid water. No precipitation is produced. If precipitation is important, use 'kessler or 'seifert_beheng'. \\\\
 '' 'kessler' ''\\\\
-      One-moment cloud microphysics according to Kessler (1969). Steering parameter: [#precipitation precipitation]\\\\
-Both schemes are based on a 0%-100%-scheme to diagnose the cloud water content and differ in the precipitation process. Therefore, it is not allowed to choose [#cloud_scheme cloud_scheme] = 'seifert_beheng' if precipitation is not allowed ([#precipitation precipitation] = .F.) in order to save computational resources.   
+      One-moment cloud microphysics according to Kessler (1969). It is also based on the saturation adjustment scheme to diagnose cloud water. However, it allows precipitation if the liquid cloud water exceeds a threshold value. This water is instantaneously removed from the model domain. Additionally,  liquid cloud water is allowed to sediment if [#cloud_water_sedimentation cloud_water_sedimentation] is set to true.
+ \\\\
+      Two-moment cloud microphysics according to Seifert and Beheng (2006). It is also based on the saturation adjustment scheme to diagnose cloud water. The cloud drop number concentration is set via [#nc_const nc_const]. Rain water and hence precipitation is treated with two additional prognostic equations for rain water content and rain drop concentration, including autoconversion, accretion, selfcollection, breakup, evaporation, and sedimentation. Ventilation effect on evaporation is steered by [#ventilation_effect ventilation_effect] and set to true per default. Sedimentation can be controlled via [#c_sedimentation c_sedimentation], [#limiter_sedimentation limiter_sedimentation]. Turbulence effects on accretion and autoconversion are steered via [#collision_turbulence collision_turbulence].
+
+Additionally,  liquid cloud water is allowed to sediment if [#cloud_water_sedimentation cloud_water_sedimentation] is set to true.\\\\
 }}}
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