Dear Elif SERTEL,<br> You can use WRF2Grads software for converting your output to grads format.It will produce grads output in same interval as in your output file.<br><br><br>regards<br><br><div><span class="gmail_quote">
On 4/27/07, <b class="gmail_sendername"><a href="mailto:wrf-users-request@ucar.edu">wrf-users-request@ucar.edu</a></b> <<a href="mailto:wrf-users-request@ucar.edu">wrf-users-request@ucar.edu</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<br>Today's Topics:<br><br> 1. FW: Using Diffusion TKE equation at 1 km (Kemp, Eric M.)<br> 2. Minimum TKE with Mellor-Yamada-Janjic PBL (Kemp, Eric M.)<br> 3. about model output (Elif SERTEL)<br><br><br>----------------------------------------------------------------------
<br><br>Message: 1<br>Date: Thu, 26 Apr 2007 14:17:07 -0400<br>From: "Kemp, Eric M." <<a href="mailto:Eric.Kemp@ngc.com">Eric.Kemp@ngc.com</a>><br>Subject: [Wrf-users] FW: Using Diffusion TKE equation at 1 km
<br>To: <<a href="mailto:wrf-users@ucar.edu">wrf-users@ucar.edu</a>><br>Message-ID: <52B67E1F32707847B44B4B7B1238E363020D5504@xmbv3801><br>Content-Type: text/plain; charset="iso-8859-1"<br><br><br><br>
Dear wrf-users:<br><br>I am attempting to model TKE with the WRF-ARW model using a horizontal resolution of 1 km and fairly high vertical resolution (~25 m in lowest 2 km, ~250 m in next 8 km, then ~500 m). The IC and<br>
LBCs are provided by the NCEP NAM model. I am currently testing the TKE diffusion option (km_opt = 2) with<br>diffusion calculated in physical space (diff_opt=2) and the PBL scheme turned off (bl_pbl_physics = 0).<br>Unfortunately these runs are producing NANs in the output file for multiple variables. I have tested with both surface layer formulations (sf_sfclay_physics = 1 and 2), but I see no improvement. I have however had success when running with the Smagorinsky 2D deformation scheme (km_opt=4) and TKE provided by the MYJ PBL scheme (bl_pbl_physics=2). The time step is 3 and 1/3 seconds.
<br><br>My question: Can the diffusion TKE option be used at 1 km? Are there other settings that should be changed to use it?<br><br>Thanks,<br><br>Eric Kemp<br>Northrop Grumman Corporation/TASC<br><br>-------------- next part --------------
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</a><br><br>------------------------------<br><br>Message: 2<br>Date: Fri, 27 Apr 2007 11:52:44 -0400<br>From: "Kemp, Eric M." <<a href="mailto:Eric.Kemp@ngc.com">Eric.Kemp@ngc.com</a>><br>Subject: [Wrf-users] Minimum TKE with Mellor-Yamada-Janjic PBL
<br>To: <<a href="mailto:wrf-users@ucar.edu">wrf-users@ucar.edu</a>><br>Cc: "Alliss, Randall J." <<a href="mailto:Randall.Alliss@ngc.com">Randall.Alliss@ngc.com</a>>, "Felton, Billy D."
<br> <<a href="mailto:Billy.Felton@ngc.com">Billy.Felton@ngc.com</a>><br>Message-ID: <52B67E1F32707847B44B4B7B1238E363020D5509@xmbv3801><br>Content-Type: text/plain; charset="iso-8859-1"<br><br>
<br><br>Dear wrf-users:<br><br>My group is attempting to simulate TKE with the WRF-ARW model at 1 km resolution. We have noticed from both simulations and the source code that the minimum TKE permitted from the MYJ TKE scheme is
0.1 m^2 s^-2. We understand there needs to be non-zero TKE for the turbulence closure to work, but we would like to know how this current threshold was chosen. An earlier paper by Gerrity et al. (MWR, 1994) lists the TKE initial condition for the Eta model as
0.00001 m^2 s^-2. A number of this magnitude might be more realistic in the stable free atmosphere.<br><br>-Eric<br><br>Eric M. Kemp<br>Northrop Grumman Corporation/TASC<br>-------------- next part --------------<br>An HTML attachment was scrubbed...
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<br><br>Message: 3<br>Date: Fri, 27 Apr 2007 11:55:05 -0400 (EDT)<br>From: "Elif SERTEL" <<a href="mailto:esertel@envsci.rutgers.edu">esertel@envsci.rutgers.edu</a>><br>Subject: [Wrf-users] about model output
<br>To: <a href="mailto:wrf-users@ucar.edu">wrf-users@ucar.edu</a><br>Message-ID:<br> <<a href="mailto:3245.172.23.42.253.1177689305.squirrel@webmail.envsci.rutgers.edu">3245.172.23.42.253.1177689305.squirrel@webmail.envsci.rutgers.edu
</a>><br>Content-Type: text/plain;charset=iso-8859-1<br><br>Dear Users,<br><br>I have 6 hourly model output results obtained from WRF-NMM. I used<br>grib2ctl utility and convert my outputs into GrADS format. However after
<br>converting them, I am having 2 hours as time interval. How should I obtain<br>6 hour interval (like my model outputs) for my GrADS file?<br><br>Best wishes,<br>Elif.<br><br>--<br>Visitor Fulbright Researcher<br>Rutgers University
<br>Departmet of Environmental Sciences<br><a href="http://www.envsci.rutgers.edu/~esertel/">http://www.envsci.rutgers.edu/~esertel/</a><br><br>Res. and Teach. Assist. Elif SERTEL<br>Istanbul Technical University<br>Civil Engineering Faculty,
<br>Remote Sensing Division<br><a href="http://www.ins.itu.edu.tr/esertel/">http://www.ins.itu.edu.tr/esertel/</a><br><br><br><br><br>------------------------------<br><br>_______________________________________________<br>
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<br>*****************************************<br></blockquote></div><br><br clear="all"><br>-- <br>ANIL KUMAR ROHILLA<br>Meteorologist<br>Long Range Forecasting Section<br>NATIONAL CLIMATE CENTER<br>O/o ADGM(Research)<br>
India Meteorological Department<br>Shivaji Nagar<br> PUNE-411005.<br> INDIA<br>Mobile: 09422023277