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<div>Hi Tabish!</div>
<div> </div>
<div>As I understand you need only a small part from huge auxhist1_d01_*** basic output file.</div>
<div> </div>
<div>There are 2 ways. First you can edit Registry.EM leaving only variables and levels you need.</div>
<div>But in this case you will have to recompile WRF.</div>
<div> </div>
<div>Second method is much easier: you just create auxhist2_d02_*** additional</div>
<div>output files while running WRF only with the variables and levels you need in your studies.</div>
<div> </div>
<div>Don't forget to create informational files for auxhist2_d02_*** output files: "my_iofields_list_d01.txt".</div>
<div>You use any name for informational files but they should be ***.out extension and</div>
<div>in them you determine variables you need, like in my case:</div>
<div>"+:h:2:U10,V10,T2".</div>
<div>In my case you see I need only T2, U10 & V10.</div>
<div>.You can order any frequency of dumping the files you need if it not less WRF time step/</div>
<div> </div>
<div>Output auxhist2_*** files are the same netCDF structure output files to apply your post-processing</div>
<div>tools you use to do to basic big file.</div>
<div> </div>
<div>In namlist.input it looks like:</div>
<div>
<div>" auxhist2_interval = 3, 3, 3<br/>
io_form_auxhist2 = 2,<br/>
frames_per_auxhist2 = 1000, 1000, <br/>
iofields_filename = "my_iofields_list_d01.txt", "my_iofields_list_d02.txt",<br/>
ignore_iofields_warning = .true.,"</div>
<div>(inside " &time_control").</div>
<div>You can create not sure about 5 such auxhist files (2,3,4,5). Not sure how many output specific</div>
<div>you can create in WRF-chem. Maybe up to 24!?</div>
<div> </div>
<div>And big output file you just dump in 3, 6, 12 whatever houres and remove after the run is finished.</div>
<div> </div>
<div>Dr Mikhail Titov</div>
<div>(Research Professor)</div>
<div> </div>
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<div style="margin:0 0 10px 0;"><b>Sent:</b> Monday, July 25, 2016 at 12:17 AM<br/>
<b>From:</b> "Tabish Ansari" <tabishumaransari@gmail.com><br/>
<b>To:</b> "wrf-users@ucar.edu" <wrf-users@ucar.edu>, wrfhelp <wrfhelp@ucar.edu><br/>
<b>Subject:</b> [Wrf-users] Write only one vertical level in wrfout file</div>
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<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;">Hi</div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;"> </div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;">I am running wrfchem 3.7.1 simulations for my studies. Since I have to run very long duration simulations, it creates huge output files- most parts of which is not useful for my study.</div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;"> </div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;">I have set 31 vertical levels in my simulations however, I need only the lowermost (zeroth) layer of the model for my study. Is it possible to modify WRF code so that it writes out only the lowermost vertical level output- this way my output files will become 30 times smaller which will be very convenient for me.</div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;"> </div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;">I will really appreciate if someone can help me in this regard.</div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;"> </div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;"> </div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;">Thanks</div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;"> </div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;">Tabish</div>
<div class="gmail_default" style="font-family: trebuchet ms , sans-serif;"> </div>
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<div><font size="1"><span style="font-family: tahoma , sans-serif;">Tabish U Ansari</span></font></div>
<font size="1"><span style="font-family: tahoma , sans-serif;">PhD student, Lancaster Environment Center</span></font></div>
<font size="1"><span style="font-family: tahoma , sans-serif;">Lancaster Univeristy<br/>
<span>Bailrigg</span>, <span>Lancaster</span>,<br/>
<span>LA1 4YW</span>, <span>United Kingdom</span></span></font></div>
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