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Dimitris,</div>
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What do you mean by extracting my boundary conditions at the correct location?</div>
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cheers,</div>
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Andreas</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> MITgcm-support <mitgcm-support-bounces@mitgcm.org> on behalf of Dimitris Menemenlis <dmenemenlis@gmail.com><br>
<b>Sent:</b> Friday, 19 June 2020 1:12 PM<br>
<b>To:</b> MITgcm Support <mitgcm-support@mitgcm.org><br>
<b>Subject:</b> Re: [MITgcm-support] [EXTERNAL] topography with OBCS</font>
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<div class="" style="word-wrap:break-word; line-break:after-white-space">Hi Andreas, are you sure that you are extracting your boundary conditions at the correct location?
<div class="">You could be off by one grid cell, which could cause this problem. Dimitris</div>
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<blockquote type="cite" class="">
<div class="">On Jun 18, 2020, at 6:21 PM, Andreas Klocker <<a href="mailto:andreas.klocker@utas.edu.au" class="">andreas.klocker@utas.edu.au</a>> wrote:</div>
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Hi,</div>
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I am trying to set up a regional model configuration with OBCS. For some reason the model seems to introduce salinities where I actually have bathymetry (see attached figure; bathymetry left, salinities right). Salinities this low definitely do not exist in
the files containing the bounday conditions. Is it necessary to set the open boundary exactly to where I have ocean, or should the bathymetry file take care of this by telling the model there should be nothing happening in case of zero water depth?</div>
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Here's my data.obcs file:</div>
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</span></div>
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<span class=""># Open-boundaries<br class="">
</span>
<div class=""> &OBCS_PARM01<br class="">
</div>
<div class=""><br class="">
</div>
<div class=""> OB_Iwest = 600*1,<br class="">
</div>
<div class=""> OB_Ieast = 600*-1,<br class="">
</div>
<div class=""> OB_Jsouth = 2600*1,<br class="">
</div>
<div class=""> OB_Jnorth = 2600*-1,<br class="">
</div>
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</div>
<div class=""> useOBCSsponge = .TRUE.,<br class="">
</div>
<div class=""> useOBCSbalance = .TRUE.,<br class="">
</div>
<div class=""> useOBCSprescribe = .TRUE.,<br class="">
</div>
<div class=""><br class="">
</div>
<div class=""> useOrlanskiWest = .FALSE.,<br class="">
</div>
<div class=""> useOrlanskiEast = .FALSE.,<br class="">
</div>
<div class=""> useOrlanskiSouth = .FALSE.,<br class="">
</div>
<div class=""> useOrlanskiNorth = .FALSE.,<br class="">
</div>
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</div>
<div class=""> OBWuFile = 'OWU',<br class="">
</div>
<div class=""> OBWvFile = 'OWV',<br class="">
</div>
<div class=""> OBWtFile = 'OWT',<br class="">
</div>
<div class=""> OBWsFile = 'OWS',<br class="">
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<div class=""> OBEuFile = 'OEU',<br class="">
</div>
<div class=""> OBEvFile = 'OEV',<br class="">
</div>
<div class=""> OBEtFile = 'OET',<br class="">
</div>
<div class=""> OBEsFile = 'OES',<br class="">
</div>
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</div>
<div class=""> OBSuFile = 'OSU',<br class="">
</div>
<div class=""> OBSvFile = 'OSV',<br class="">
</div>
<div class=""> OBStFile = 'OST',<br class="">
</div>
<div class=""> OBSsFile = 'OSS',<br class="">
</div>
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<div class=""> OBNuFile = 'ONU',<br class="">
</div>
<div class=""> OBNvFile = 'ONV',<br class="">
</div>
<div class=""> OBNtFile = 'ONT',<br class="">
</div>
<div class=""> OBNsFile = 'ONS',<br class="">
</div>
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</div>
<div class=""># OBCS_monitorFreq= 86400.,<br class="">
</div>
<div class=""># OBCS_monSelect = 1,<br class="">
</div>
<div class=""> &<br class="">
</div>
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</div>
<div class=""># Orlanski parameters<br class="">
</div>
<div class=""> &OBCS_PARM02<br class="">
</div>
<div class=""># Cmax=0.45,<br class="">
</div>
<div class=""># cVelTimeScale=1000.,<br class="">
</div>
<div class=""> &<br class="">
</div>
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</div>
<div class=""> &OBCS_PARM03<br class="">
</div>
<div class=""> Urelaxobcsinner=864000.,<br class="">
</div>
<div class=""> Urelaxobcsbound=86400.,<br class="">
</div>
<div class=""> Vrelaxobcsinner=864000.,<br class="">
</div>
<div class=""> Vrelaxobcsbound=86400.,<br class="">
</div>
<div class=""> spongeThickness=40.,<br class="">
</div>
<div class=""> &<br class="">
</div>
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Thanks in advance!</div>
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Andreas</div>
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