Changes between Version 487 and Version 488 of doc/tec/changelog_2018

Timestamp:

Oct 27, 2015 8:21:05 AM (9 years ago)

Author:

maronga

Comment:

--

doc/tec/changelog_2018

@@ -34 +34 @@
 '''New:'''
 * new module {{{surface_layer_fluxes.f90}}} added (replaces {prandtl_fluxes.f90}). PALM now offers three methods to derive the surface fluxes that are steered via the {{{inipar}}} parameter {{{most_method}}}:
-
      * the "old" method ({{{most_method = 'circular'}}}, which is the fastest method, but inaccurate)
-
      * a new method based on the evaluation of the Richardson number to derive the Obukhov length by using a Newton iteration algorithm ({{{most_method = 'newton'}}} accurate, but relatively slow)
-
      * a new method (new default) based on the evaluation of the Richardson number to derive the Obukhov length using a lookup-table ({{{most_method = 'lookup'}}} accurate, faster than the Newton iteration method, but slightly slower than the old method). Please note that this method cannot be used when the surface roughness (in terms of roughness length) is not homogeneously distributed.
 
@@ -48 +45 @@
 * in the course of the implementation of the new surface flux calculations, the following parameters have been changed:
   * {{{rif}}} was removed
-
   * {{{rif_max}}} and {{{rif_min}}} have been renamed to {{{zeta_max}}} and {{{zeta_min}}} ({{{zeta = z_mo/L}}} with {{{z_mo}}} being the height of the constant flux layer, and {{{L}}} being the Obukhov length
-
   * limits for {{{zeta_max}}} and {{{zeta_min}}} have been changed to allow better representation of free convection and very stable conditions
+  * default values for {{{dissipation_1d}}} and {{{mixing_length_1d}}} were changed to {{{'detering'}}} and {{{'blackadar'}, respectively.
 
   * similarity functions for stable conditions has bee altered to allow for very stable conditions
-
-  * default values for {{{dissipation_1d}}} and {{{mixing_length_1d}}} were changed to {{{'detering'}}} and {{{'blackadar'}, respectively.
 
   * The output of the Obukhov length has been revised and is now evaluated as the horizontal average of the 2d field {{{ol(j,i)}}}.