Changes between Version 480 and Version 481 of doc/tec/changelog_2018

Timestamp:

Oct 26, 2015 4:28:57 PM (10 years ago)

Author:

maronga

Comment:

--

doc/tec/changelog_2018

@@ -11 +11 @@
 
 ||='''Date'''  =||='''Author'''  =||='''svn\\Revision'''  =||='''Last\\Release'''  =||='''Type''' =||='''Description''' =||
+|----------------
+{{{#!td style="vertical-align:top;width: 50px"
+26/10/15
+}}}
+{{{#!td style="vertical-align:top;width: 50px"
+BM
+}}}
+{{{#!td style="vertical-align:top;width: 75px"
+r1691
+}}}
+{{{#!td style="vertical-align:top"
+4.0
+}}}
+{{{#!td style="vertical-align:top"
+B,C,N
+}}}
+{{{#!td style="vertical-align:top"
+'''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 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)
+
+'''Changed:'''
+* 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
+
+  * similarity functions for stable conditions has bee altered to allow for very stable conditions
+
+
+'''Bugfix:'''
+  * Minor formatting corrections
+  * Calculation of trace gas profiles in RRTMG corrected
+  * Prognostic equations for skin temperature in land surface model corrected
+
+}}}
 |----------------
 {{{#!td style="vertical-align:top;width: 50px"