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Hi MITgcm commuity,</div>
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Hope you all well.</div>
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I built an idealized 3D internal tide model based on <a data-auth="NotApplicable" title="https://github.com/MITgcm/MITgcm/blob/master/verification/internal_wave" class="x_OWAAutoLink" id="OWA5ab2e968-ce3e-abf1-fa12-80da36710fce" href="https://github.com/MITgcm/MITgcm/blob/master/verification/internal_wave">
internal_wave experiment</a> to calculate the energy flux F=<u'p'>(<a data-auth="NotApplicable" title="https://doi.org/10.1175/JTECH1784.1" class="x_OWAAutoLink" id="OWA6d98e42f-c8f5-1af0-a161-7c8a9a3c21fe" href="https://doi.org/10.1175/JTECH1784.1">Nash et
al., 2005</a>). Periodic 1-mode internal tides propagate to the right and interact with a simple topography. The model works but I got stuck at the energy flux balance part. Sometimes when I chose a small area within the topography to calculate the net energy
flux across its boundary, the result is positive, which means there are rather dissipation but genaration of enerny. So I wanna ask if someone has experience with this. </div>
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<span style="font-size: 12pt;">Basically, I use <i>RHOAnoma</i>+<i>rhoConst</i> to get original density
<i>rho</i>, cause the paper gets density anomaly from </span><span style="font-size: 16px; background-color: rgb(255, 255, 255);"><i>rho(z,t)-rho_mean(z),
</i>where<i> rho_mean(z) </i>is the time mean vertical density profile (I guess I could also just use the
<i>Rhoref(z) </i>as the reference profile?). The question is the C-grids, should I calculate these values on T-points or U-V points so the energy could be more balenced? Or maybe some other factors I didn't realize? </span></div>
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<span style="background-color: rgb(255, 255, 255);">By the way, the non-hydrostatic pressure is quite small, so I ignored it.</span></div>
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<span style="background-color: rgb(255, 255, 255);">Thanks for any suggestions.</span></div>
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<span style="background-color: rgb(255, 255, 255);">Kind regards,</span></div>
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<span style="background-color: rgb(255, 255, 255);">Sean</span></div>
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University of East Anglia</div>
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