[Wrf-users] OBSGRID and MADIS MESONET data

[Trang Tran]

Hi Bart,

I am facing the exact trouble. I've tried many tips that I've learned
online, no success so far. If you have solved the problem, I would highly
appreciate if you could share your valuable experience.

FYI: I am using WRF V3.5, already applied the bug fix suggested on WRF user
page for that version, nudging with MADIS data. I am trying to rerun the
simulation with WRF V3.5.1 to see if the problem is solved. I did try
running that crashed simulation with serial run instead of not parallel run
as usual, the simulation got over the crash point at which the parallel run
hit, but it crashed at very last hour of the simulation, also with
"Segmentation fault" error.

Trang


2013/10/16 Bart Brashers <bbrashers at environcorp.com>

> Does anyone have a suggestion for OBSGRID's QC settings, for use the MADIS
> MESONET data?
>
> I'm investigating using MADIS data, as processed through OBSGRIDv3.4.0,
> for OBS nudging (obs_nudge_opt = 0, 0, 1,) in WRFv3.5.1.  MADIS data
> contains MESONET data as one of its streams - there's lots of data there,
> but of unknown quality.  Fortunately, OBSGRID's namelist has in &record4 a
> bunch of settings for Quality Control.
>
> One of my 5.5-day WRF runs (starting at 2011-07-05_12) crashes, and I've
> narrowed it down to the use of MESONET data.  There were no CFL errors, but
> 7 of the 64 threads crashed, e.g.
>
> ---------------------
> $ tail rsl.error.0013
> ****** CALL IN4DOB AT KTAU = 13428 AND XTIME =    2238.00:  NSTA =    6333
> ******
>  ++++++CALL ERROB AT KTAU = 13428 AND INEST =  3:  NSTA =  6333 ++++++
>
>  REPORTING OBS MASS-PT LOCS FOR NEST    3 AT XTIME=  2238.0 MINUTES
>  FREQ=  30, MAX=   10 LOCS, NEWLY READ OBS ONLY, -999 => OBS OFF PROC
>
>      OBS#     I       J       K     OBS LAT  OBS LON   XLAT(I,J)
>  XLONG(I,J)  TIME(hrs)  OBS STATION ID
>       6312  88.754 295.035   1.000   45.350 -111.734   -999.000   -999.000
>    38.27       ENNM8
>
> [compute-0-5:28270] *** Process received signal ***
> [compute-0-5:28270] Signal: Segmentation fault (11)
> [compute-0-5:28270] Signal code: Address not mapped (1)
> [compute-0-5:28270] Failing at address: 0xfffffffe0471ead0
> [compute-0-5:28270] *** End of error message ***
> ---------------------
>
> >From my namelist.oa:
>
> &record4
>  qc_test_error_max           = .TRUE.
>  qc_test_buddy               = .TRUE.
>  qc_test_vert_consistency    = .TRUE.
>  qc_test_convective_adj      = .TRUE.
>  max_error_t                 = 5
>  max_error_uv                = 13
>  max_error_z                 = 8
>  max_error_rh                = 25
>  max_error_p                 = 600
>  max_buddy_t                 = 8
>  max_buddy_uv                = 8
>  max_buddy_z                 = 8
>  max_buddy_rh                = 40
>  max_buddy_p                 = 800
>  buddy_weight                = 1.0
>  max_p_extend_t              = 1300
>  max_p_extend_w              = 1300
> /
>
> Any suggestions for how to diagnose this problem?  I've looked through the
> OBS_DOMAIN301 file, and as far as I can see there's nothing really bad
> around the time of the crash (2011-07-07_01) nor with the entry for station
> ENNM8.
>
> Bart Brashers
> bbrashers at environcorp.com
>
>
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