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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Sounds like you have 2 issues:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>1. OBSGRID.EXE is not writing output at the times you want<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>2. WRF-Chem is bombing when nudging<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I posted a bit on problem 1 – I was misinterpreting the DOCs (or the DOCs are misleading, depending on your viewpoint). See <a href="http://mailman.ucar.edu/pipermail/wrf-users/2011/002424.html">http://mailman.ucar.edu/pipermail/wrf-users/2011/002424.html</a>. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Basically, set &share::interval_seconds to match your input GRIB data interval (must match the interval you ran METGRID.EXE with). This is 21600 if your GRIB files come every 6 hours. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Then make sure your little_r format files contain data every &record7::intf4d (from your email, it looks sorta like you want to nudge every 3 hours). The main point is that OBSGRID.EXE will look for a new file every intf4d seconds, and will not look in a file that’s already been opened (from a previous interval).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I’m nearly certain that you must combine both your surface and upper-air data into the same file, but that’s pretty easy – you can just “cat” them together. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I suggest you fix problem 1 first, so you have non-empty OBS_DOMAIN1?? files for the in-between hours, before addressing the bombing of WRF.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=FR style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#003366'>Bart Brashers<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> wrf-users-bounces@ucar.edu [mailto:wrf-users-bounces@ucar.edu] <b>On Behalf Of </b>Chris Klich<br><b>Sent:</b> Sunday, October 30, 2011 12:31 PM<br><b>To:</b> wrf-users@ucar.edu<br><b>Subject:</b> [Wrf-users] Help with Obs Nudging Crash<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hi all, I have recently been trying to use obs-nudging with my WRF run. I am currently running WRF-Chem version 3.2.1 due to a long-term project and unable to upgrade to 3.3.<br><br>I currently have both upper air and surface data in little-r format (separate however). I convert these files into the proper naming format for OBSGRID, run obsgrid and move the files to the /run directory, concatenate all the OBS_DOMAIN files into OBS_DOMAIN101, and then run real.exe and wrf.exe. However, when OBSGRID runs, the output files are every 3 hours, while my met_em files and observation files are every 6. These 3 hour intermediate times (3, 9, 15, 21) are empty when the OBS_DOMAIN and plotobs and qc files are outputted, while the normal intervals of 0, 6, 12, 18 are several megabytes. Even in this case, I had tried concatenating all files to OBS_DOMAIN101 and running WRF. However, it seems the entire run finishes only when I use just upper air data specifically. When I run using just surface obs or concatenating surface to upper air, the run crashes, and it seems at a very random time. When using just surface it crashed after about 12:49 into the run, while running with the concatenated upper air/surface, it crashed after about 3 days, 12:49. I can't seem to figure out what is causing this. The end of my rsl.error.0000 file looks like:<br><br>Timing for main (dt=135.00): time 2008-05-20_12:45:13 on domain 1: 1.08750 elapsed seconds.<br>Timing for main (dt=135.00): time 2008-05-20_12:47:28 on domain 1: 1.05240 elapsed seconds.<br> OBS NUDGING: Reading new obs for time window TBACK = 12.125 TFORWD = 13.458<br> for grid = 1<br> OBS NUDGING: 1 previously read obs are now too old for the current window a<br> nd have been removed.<br> ****** CALL IN4DOB AT KTAU = 326 AND XTIME = 767.48: NSTA = 43 ****<br> **<br> ++++++CALL ERROB AT KTAU = 326 AND INEST = 1: NSTA = 43 ++++++<br> OBS NUDGING FOR IN,J,KTAU,XTIME,IVAR,IPL: 1 10 326 767.48 3 3 rindx= 5.<br> 3<br> OBS NUDGING FOR IN,J,KTAU,XTIME,IVAR,IPL: 1 10 326 767.48 4 4 rindx= 5.<br> 3<br> OBS NUDGING FOR IN,J,KTAU,XTIME,IVAR,IPL: 1 10 326 767.48 1 1 rindx= 5.<br> 3<br> OBS NUDGING FOR IN,J,KTAU,XTIME,IVAR,IPL: 1 10 326 767.48 2 2 rindx= 5.<br> 3<br>Timing for main (dt=135.00): time 2008-05-20_12:49:43 on domain 1: 1.07960 elapsed seconds.<br>forrtl: error (78): process killed (SIGTERM)<br>Image PC Routine Line Source <br>libc.so.6 00000033C34DD1E3 Unknown Unknown Unknown<br>libopen-pal.so.0 00002B47160653DD Unknown Unknown Unknown<br>libopen-pal.so.0 00002B471606213D Unknown Unknown Unknown<br>libopen-pal.so.0 00002B471605555C Unknown Unknown Unknown<br>libmpi.so.0 00002B4715B43AA8 Unknown Unknown Unknown<br>libmpi.so.0 00002B4715B721AC Unknown Unknown Unknown<br>wrf.exe 0000000001C64282 Unknown Unknown Unknown<br>wrf.exe 0000000000F373F4 Unknown Unknown Unknown<br>wrf.exe 00000000014F73B5 Unknown Unknown Unknown<br>wrf.exe 0000000000E8EC4F Unknown Unknown Unknown<br>wrf.exe 0000000000D8DB6D Unknown Unknown Unknown<br>wrf.exe 000000000052ECDF Unknown Unknown Unknown<br>wrf.exe 00000000004BC733 Unknown Unknown Unknown<br>wrf.exe 00000000004BC6E7 Unknown Unknown Unknown<br>wrf.exe 00000000004BC67C Unknown Unknown Unknown<br>libc.so.6 00000033C341EC9D Unknown Unknown Unknown<br>wrf.exe 00000000004BC579 Unknown Unknown Unknown<br><br><br><br>In addition, when I use upper air data, I get thousands and thousands of lines in my rsl.error.0000 file that read something like:<br><br>n= 9061 unknown ob of type FM-88 SATOB<br><br>Is this normal or is there an option I am missing where it will read these correctly?<br><br>Any help for either of these problems would be greatly appreciated as I need to figure this out ASAP.<br><br>I've also attached both namelist.input and namelist.oa for any help that may provide.<br><br>Thank you.<br><br>-- <br>Christopher Klich<br>Graduate Student<br>Florida State University<br>(908) 208-9743<o:p></o:p></p></div></div>
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