Changes between Version 40 and Version 41 of Lorenz_96_model


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Timestamp:
Feb 22, 2023, 3:59:40 PM (16 months ago)
Author:
lnerger
Comment:

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  • Lorenz_96_model

    v40 v41  
    187187|| use_obs_mask || whether to use incomplete observations (need to be .true. for any other settings on the observation density to be used) || .false. ||
    188188
    189 For the full set of options, please see init_pdaf.F90 in the lorenz96 directory. There, also the possible settings e.g. for `filtertype` or `locweight` are described.
    190 
    191 
     189
     190The localization is controlled by the variables `locweight`, `cradius`, nD `sradius`:
     191
     192||= '''locweight''' =||= '''0''' =||= '''1''' =||= '''2''' =||= '''3''' =||= '''4''' =||
     193||= function =|| unit weight ||  exponential  ||||||||  5-th order polynomial  ||
     194||= regulation =||  -  ||  -  ||  -  ||  regulation using[[BR]]mean variance  ||  regulation using variance[[BR]]of single observation point  ||
     195||= '''cradius''' =||||||||||||  weight=0 if distance > cradius  ||
     196||= '''sradius''' =||  no impact  ||  weight = exp(-d / sradius)  ||||||||  weight = 0 if d >= sradius[[BR]] else[[BR]] weight = f(sradius, distance)  ||
     197
     198Here, '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].
     199
     200For the full set of options, please see init_pdaf.F90 in the lorenz96 directory. There, also the possible settings e.g. for `filtertype` are described.
     201
     202