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<div style="margin-top:0;margin-bottom:0;">Hello NCL Support,</div>
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<div style="margin-top:0;margin-bottom:0;">We are trying to find a script that would "subtract" the calculated monthly averaged ozone (o3) concentrations in netcdf format, and then plot the gridded concentration difference on a NCL plot. The individual 1-hour
wrfout_d01* output files for July of a given year add up to 743 files, considering 24 files per day and 31 day for the month. The end result could be a visual representation of a gridded o3 average concentration subtraction from two different WRF-Chem mechanisms,
for that specific month. </div>
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Also attached you will find the current <font color="#006FC9"><b><i>w</i></b></font><font color="#006FC9"><b><i>r</i></b></font><font color="#006FC9"><b><i>f</i></b></font><font color="#006FC9"><b><i>_</i></b><i><b>hrly_to_monthly</b></i><b><i>.</i></b></font><font color="#006FC9"><b><i>n</i></b></font><font color="#006FC9"><b><i>c</i></b></font><font color="#006FC9"><b><i>l</i></b></font>
and <b><i><span style="color: rgb(0, 111, 201);">plot_avg_o3_month.ncl</span></i>
</b>scripts, which we currently use to post-process the 743 individual 1-hour wrfout_d01* files for o3 for the entire month of July. Also attached is a sample post-processed image belonging to the same month.<br>
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Would appreciate any comments or feedback with the above issue.<br>
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With kind regards,<br>
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<br>
Carlos J. Bucaram</span></font><br>
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