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<p dir="auto">On 3 Aug 2017, at 10:50, rahele shafiee wrote:</p>
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<div style="white-space:normal"><blockquote style="border-left:2px solid #5855D5; color:#5855D5; margin:0 0 5px; padding-left:5px"><p dir="auto">Hello to everyone<br>
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I would like to give my model the tidal amplitude and phase inthe open boundaries. How do I introduce these numbers to my model?<br>
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Can I give surface elevation (ETA) tothe model instead of the amplitude and phase monthly?</p>
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<p dir="auto">Hi Rahele,</p>
<p dir="auto">The way to add open boundary forcing in the MITgcm is with <code>pkg/obcs</code> or <code>pkg/rbcs</code> (maybe others?)</p>
<p dir="auto"><code>pkg/obcs</code> has forcing of tidal velocities normal to the open boundary, implemnted in <code>pkg/obcs/obcs_add_tides.F</code>. You can get this to work by specifying in <code>data.obcs</code> appropriate names for <code>OBNAmFile</code> and <code>OBNphFile</code>. Look at <code>pkg/obcs/obcs_readparms.F</code> for all the possible parameters you can read into the <code>pkg/obcs</code>, and read the source code to <code>pkg/obcs/obcs_add_tides.F</code> to see how it works. </p>
<p dir="auto">As implemented, <code>pkg/obcs/obcs_add_tides.F</code> doesn’t modify the sea surface height at the boundary. However, <code>pkg/obcs</code> does allow seasurface height to be specified at the boundary (i.e. see <code>OBNetaFile</code>, etc). So it seems a somewhat trivial task to write <code>obcs_add_tideheights.F</code> and have new parameters <code>OBNamEtaFile</code> etc that control the sea-surface height if you prefer that to specifying via the <code>OBNetaFile</code>. </p>
<p dir="auto">I think this is all possible w/ <code>pkg/obcs</code>, though I admit I’m not sure if <code>rbcs</code> can force the sea surface. I think not, though I could be misremembering. </p>
<p dir="auto">I hope that gets you started. </p>
<p dir="auto">Cheers, Jody</p>
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<div style="white-space:normal"><blockquote style="border-left:2px solid #5855D5; color:#5855D5; margin:0 0 5px; padding-left:5px"><p dir="auto">Cheers Rahele<br>
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