[Wrf-users] WRFDA negative height problem

Sean Crowell Sean.Crowell at noaa.gov
Tue Nov 29 12:38:28 MST 2011


I am attempting to run WRFDA, and I have generated a background error  
file, a set of observations, and a first guess from WRF using NAM data  
as initial and boundary conditions.  When I run da_wrfvar.exe, I get  
the following error message in my rsl.error.*:

   Ntasks in X            2, ntasks in Y            3
   *************************************
   Parent domain
   ids,ide,jds,jde            1         266           1         172
   ims,ime,jms,jme          127         271          -4          64
   ips,ipe,jps,jpe          134         266           1          57
   *************************************
  DYNAMICS OPTION: Eulerian Mass Coordinate
     alloc_space_field: domain            1,              852723024  
bytes allocat
  ed
  WRF TILE   1 IS    134 IE    265 JS      1 JE     57
  WRF NUMBER OF TILES =   1
  ---------------------------- FATAL ERROR -----------------------
  Fatal error in file: <A HREF="http://www.mmm.ucar.edu/people/wrfhelp/wrfvar/cod
  e/trunk/da_transfer_xatowrf.html">da_transfer_xatowrf.inc</a>   
LINE:     442
  Negative height found
     222    22 ht =      -1.19 terr =        7.11
  ----------------------------------------------------------------

Can you help me to understand what might be going wrong here?  I'm  
certain that I've set something wrong, but I don't know what.  I  
copied my WRF namelist over to my WRFDA namelist, so I know the  
settings should match.  For completeness, here's the rsl.out.* file:

***  VARIATIONAL ANALYSIS ***
   Ntasks in X            2, ntasks in Y            3
   *************************************
   Parent domain
   ids,ide,jds,jde            1         266           1         172
   ims,ime,jms,jme          127         271          -4          64
   ips,ipe,jps,jpe          134         266           1          57
   *************************************
  DYNAMICS OPTION: Eulerian Mass Coordinate
     alloc_space_field: domain            1,              852723024  
bytes allocat
  ed
  WRF TILE   1 IS    134 IE    265 JS      1 JE     57
  WRF NUMBER OF TILES =   1
Set up observations (ob)

Using ASCII format observation input

  scan obs ascii
  end scan obs ascii
Observation summary
    ob time  1
       sound                 79 global,      13 local
       synop                961 global,     114 local
       pilot                  0 global,       0 local
       satem                  0 global,       0 local
       geoamv                 0 global,       0 local
       polaramv               0 global,       0 local
       airep               1603 global,     369 local
       gpspw                  0 global,       0 local
       gpsrf                  0 global,       0 local
       metar                  0 global,       0 local
       ships                  0 global,       0 local
       ssmi_rv                0 global,       0 local
       ssmi_tb                0 global,       0 local
       ssmt1                  0 global,       0 local
       ssmt2                  0 global,       0 local
       qscat                  0 global,       0 local
       profiler               0 global,       0 local
       buoy                   0 global,       0 local
       bogus                  0 global,       0 local
       pseudo                 0 global,       0 local
       radar                  0 global,       0 local
       radiance               0 global,       0 local
       airs retrieval         0 global,       0 local
       sonde_sfc             79 global,      13 local
       mtgirs                 0 global,       0 local
       tamdar                 0 global,       0 local

Set up background errors for regional application for cv_options =   5

    Using the averaged regression coefficients for unbalanced part

    WRF-Var dry control variables are:psi, chi_u, t_u and ps_u
    Humidity control variable is rh

Vertical truncation for psi    =  13(  99.00%)

Vertical truncation for chi_u  =  16(  99.00%)

Vertical truncation for t_u    =  25(  99.00%)

Vertical truncation for rh     =  23(  99.00%)



      >>> Save the variances and scale-lengths in outer-loop 1

    Scaling: var, len, ds:   0.100000E+01   0.100000E+01   0.180000E+05
    Scaling: var, len, ds:   0.100000E+01   0.100000E+01   0.180000E+05
    Scaling: var, len, ds:   0.100000E+01   0.100000E+01   0.180000E+05
    Scaling: var, len, ds:   0.100000E+01   0.100000E+01   0.180000E+05
    Scaling: var, len, ds:   0.100000E+01   0.100000E+01   0.180000E+05
Calculate innovation vector(iv)

Minimize cost function using CG method

    jo_sound                   0.262194959846E+04
    jo%sound_u            0.149525238198E+04
    jo%sound_v            0.756634251656E+03
    jo%sound_t            0.253029644007E+03
    jo%sound_q            0.117033320818E+03
    jo_sonde_sfc          0.000000000000E+00
    jo%sonde_sfc_u        0.000000000000E+00
    jo%sonde_sfc_v        0.000000000000E+00
    jo%sonde_sfc_t        0.000000000000E+00
    jo%sonde_sfc_p        0.000000000000E+00
    jo%sonde_sfc_q        0.000000000000E+00
    jo_synop                   0.636955314734E+08
    jo%synop_u            0.491152971520E+03
    jo%synop_v            0.304559122743E+04
    jo%synop_t            0.829944173431E+07
    jo%synop_p            0.553925320036E+08
    jo%synop_q            0.209912537612E+02
    jo%total            0.637064792883E+08
    jo_sound              0.262194959846E+04
    jo_sonde_sfc          0.000000000000E+00
    jo_geoamv             0.000000000000E+00
    jo_polaramv           0.000000000000E+00
    jo_synop              0.636955314734E+08
    jo_satem              0.000000000000E+00
    jo_pilot              0.000000000000E+00
    jo_airep              0.832586532811E+04
    jo_metar              0.000000000000E+00
    jo_ships              0.000000000000E+00
    jo_gpspw              0.000000000000E+00
    jo_ssmi_tb            0.000000000000E+00
    jo_ssmi_rv            0.000000000000E+00
    jo_ssmt1              0.000000000000E+00
    jo_ssmt2              0.000000000000E+00
    jo_pseudo             0.000000000000E+00
    jo_qscat              0.000000000000E+00
    jo_profiler           0.000000000000E+00
    jo_buoy               0.000000000000E+00
    jo_radar              0.000000000000E+00
    jo_gpsref             0.000000000000E+00
    jo_bogus              0.000000000000E+00
    jo_radiance           0.000000000000E+00
    jo_airsr              0.000000000000E+00
    jo_mtgirs             0.000000000000E+00
    jo_tamdar             0.000000000000E+00
    jo_tamdar_sfc          0.000000000000E+00
Starting outer iteration :   1
Starting cost function:  4.25254199D+08, Gradient=  1.98261367D+05
For this outer iteration gradient target is:        1.98261367D+03
----------------------------------------------------------
Iter    Cost Function         Gradient             Step
   1      1.71179200D+08      8.41493011D+04      1.29275354D-02
   2      9.54624377D+07      4.47172535D+04      2.13855787D-02
   3      7.16577641D+07      3.08483006D+04      2.38090454D-02
   4      5.95942218D+07      1.72014545D+04      2.53537591D-02
   5      5.47628019D+07      1.56966639D+04      3.26568609D-02
   6      5.16598630D+07      9.96024256D+03      2.51876992D-02
   7      4.95550876D+07      8.22891171D+03      4.24322367D-02
   8      4.82312735D+07      6.35948495D+03      3.90995895D-02
   9      4.73919322D+07      5.09046293D+03      4.15073184D-02
  10      4.69090645D+07      4.20757477D+03      3.72686462D-02
  11      4.66196330D+07      3.79322360D+03      3.26973125D-02
  12      4.64207492D+07      2.83758913D+03      2.76447402D-02
  13      4.62677592D+07      2.03484654D+03      3.80009081D-02
  14      4.61558173D+07      1.48366366D+03      5.40703801D-02
----------------------------------------------------------

Inner iteration stopped after   14 iterations

    jo_sound                   0.686012931808E+06
    jo%sound_u            0.122287370327E+06
    jo%sound_v            0.149678539580E+05
    jo%sound_t            0.548725663831E+06
    jo%sound_q            0.320436913736E+02
    jo_sonde_sfc          0.000000000000E+00
    jo%sonde_sfc_u        0.000000000000E+00
    jo%sonde_sfc_v        0.000000000000E+00
    jo%sonde_sfc_t        0.000000000000E+00
    jo%sonde_sfc_p        0.000000000000E+00
    jo%sonde_sfc_q        0.000000000000E+00
    jo_synop                   0.209394523833E+07
    jo%synop_u            0.272392793587E+05
    jo%synop_v            0.115704332054E+05
    jo%synop_t            0.180881916304E+07
    jo%synop_p            0.246310098594E+06
    jo%synop_q            0.626412325805E+01
    jo%total            0.329586223340E+07
    jo_sound              0.686012931808E+06
    jo_sonde_sfc          0.000000000000E+00
    jo_geoamv             0.000000000000E+00
    jo_polaramv           0.000000000000E+00
    jo_synop              0.209394523833E+07
    jo_satem              0.000000000000E+00
    jo_pilot              0.000000000000E+00
    jo_airep              0.515904063267E+06
    jo_metar              0.000000000000E+00
    jo_ships              0.000000000000E+00
    jo_gpspw              0.000000000000E+00
    jo_ssmi_tb            0.000000000000E+00
    jo_ssmi_rv            0.000000000000E+00
    jo_ssmt1              0.000000000000E+00
    jo_ssmt2              0.000000000000E+00
    jo_pseudo             0.000000000000E+00
    jo_qscat              0.000000000000E+00
    jo_profiler           0.000000000000E+00
    jo_buoy               0.000000000000E+00
    jo_radar              0.000000000000E+00
    jo_gpsref             0.000000000000E+00
    jo_bogus              0.000000000000E+00
    jo_radiance           0.000000000000E+00
    jo_airsr              0.000000000000E+00
    jo_mtgirs             0.000000000000E+00
    jo_tamdar             0.000000000000E+00
    jo_tamdar_sfc          0.000000000000E+00
Final:  14 iter, J= 4.61558173D+07, g= 1.48366366D+03
----------------------------------------------------------
  ---------------------------- FATAL ERROR -----------------------
  Fatal error in file: <A HREF="http://www.mmm.ucar.edu/people/wrfhelp/wrfvar/cod
  e/trunk/da_transfer_xatowrf.html">da_transfer_xatowrf.inc</a>   
LINE:     442
  Negative height found
     222    22 ht =      -1.19 terr =        7.11
  ----------------------------------------------------------------
taskid: 1 hostname: 4351-crowell.winstorm.nssl
taskid: 1 hostname: 4351-crowell.winstorm.nssl



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