Changes between Version 53 and Version 54 of InitPdaf

Timestamp:

Feb 22, 2023, 3:56:28 PM (14 months ago)

Author:

lnerger

Comment:

--

InitPdaf

@@ -94 +94 @@
 The routine `init_pdaf` in the example also initializes several variables that are not used to call `PDAF_init`. These variables control some functionality of the user-supplied routines for the data assimilation system and are shared with these routines through the Fortran module `mod_assimilation`. These variables are for example:
  * `delt_obs`: An integer specifying the number of time steps between two analysis steps
- * `rms_obs`: Assumed observation error
+ * `rms_obs`: Assumed observation error (when PDAF-OMI is used the observation error is usually defined separately for each observation, see the [wiki:PDAF_OMI_Overview description of OMI])
  * `cradius`: Localization cut-off radius in grid points for the observation domain
  * `sradius`: support radius, if observation errors are weighted (i.e. `locweight>0`)
@@ -100 +100 @@
 It is useful to define variables like these at this central position. Of course, their definition has to be adapted to the particular model used. The example codes describe the options for `locweight`.
 
-The setting of `locweight` influence the weight function for the localization. If PDAF-OMI is used, the choices are standardized as follows
+The setting of `locweight` influences the weight function for the localization. If PDAF-OMI is used, the choices are standardized as follows
 
 ||= '''locweight''' =||= '''0''' =||= '''1''' =||= '''2''' =||= '''3''' =||= '''4''' =||
-||= '''function''' =|| unit weight || exponential |||||||| 5-th order polynomial ||
-||= '''regulation''' =||= - =||= - =||= - =||= regulation using[[BR]]mean variance =||= regulation using variance[[BR]]of single observation point =||
-||= '''cradius''' =||||||||||||= weight=0 if distance > cradius =||
-||= '''sradius''' =||= no impact =||= weight = exp(-d / sradius) =||||||||= weight = 0 if d >= sradius[[BR]] else[[BR]] weight = f(sradius, distance) =||
+||= '''function''' =|| unit weight ||  exponential  ||||||||  5-th order polynomial  ||
+||= '''regulation''' =||  -  ||  -  ||  -  ||  regulation using[[BR]]mean variance  ||  regulation using variance[[BR]]of single observation point  ||
+||= '''cradius''' =||||||||||||  weight=0 if distance > cradius  ||
+||= '''sradius''' =||  no impact  ||  weight = exp(-d / sradius)  ||||||||  weight = 0 if d >= sradius[[BR]] else[[BR]] weight = f(sradius, distance)  ||
+
+Here, 'regulation' refers to the regulated localization introduced in Nerger, L., Janjić, T., Schröter, J., Hiller, W. (2012). A regulated localization scheme for ensemble-based Kalman filters. Quarterly Journal of the Royal Meteorological Society, 138, 802-812. ​[https://doi.org/10.1002/qj.945 doi:10.1002/qj.945].