Changes between Version 2 and Version 3 of doc/tec/nudging

Timestamp:

Nov 1, 2013 1:47:13 PM (11 years ago)

Author:

heinze

Comment:

--

doc/tec/nudging

@@ -7 +7 @@
 Instead of taking nudging data from measurements it is also possible to use data from a larger scale model to drive PALM. Further information about nudging can be found in Neggers et al., 2012.\\
 
-With revision r1241 it is possible to use [../../app/inipar#nudging nudging]. The nudging method in PALM which is based on implementations in the [https://www.gitorious.org/dales DALES] and [https://gitorious.org/uclales UCLA-LES] model consists principally of the following steps for the prognostic variables
+Beginning with revision r1241 it is possible to use [../../app/inipar#nudging nudging]. The nudging method in PALM which is based on implementations in the [https://www.gitorious.org/dales DALES] and [https://gitorious.org/uclales UCLA-LES] model consists principally of the following steps for the prognostic variables
 {{{
 #!Latex
@@ -36 +36 @@
  is the nudging time scale
 
-
+The strength of the nudging strongly depends on the nudging time scale used. Usually, this time scale should be in the order of several hours. By varying the nudging time scale with height it is possible to apply the nudging not everywhere but for example only above the boundary layer. In case this is wanted, the time scale should be set to a very large number (~10^10^) inside the boundary layer. By this way, the nudging tendency will approach zero.
 
 === References ===