Changes between Version 486 and Version 487 of doc/tec/changelog_2018

Timestamp:

Oct 27, 2015 8:19:25 AM (9 years ago)

Author:

maronga

Comment:

--

doc/tec/changelog_2018

@@ -35 +35 @@
 * 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 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)
+     * 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.
 
   * Output of radiative heating rates added in case of RRTMG is used as radiation scheme. The radiation tendency for potential temperature is now directly calculated using the heating rates from RRTMG.