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Hello, everyone</div>
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Recently I try to get the disspation of internal tide from MITgcm output, I have set the coefficients for constant viscosity, diffusion, and bottom friction. I want to know that, in this way, can I use the equations(15-18) of You et al. (2023) to do the job?</div>
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<img style="max-width: 100%; width: 408.947px; height: 42px;" class="w-1194 h-122" id="imageSelected1" width="408" height="42" size="17300" contenttype="image/png" data-outlook-trace="F:1|T:1" src="cid:11fddd70-bb73-4fc8-a7ac-eade39c97c0c"><br>
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<img style="max-width: 100%; width: 559.912px; height: 171px;" class="w-1622 h-496" id="imageSelected0" width="559" height="171" size="101901" contenttype="image/png" data-outlook-trace="F:1|T:1" src="cid:9631aa7a-893b-4d27-8daa-788aa288b2cc"><br>
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In my experience (<span style="display: inline !important; background-color: rgb(255, 255, 255);" class="ContentPasted6">in the only M2 internal tide<span style="display: inline !important; background-color: rgb(255, 255, 255);"><span> </span>model</span></span>),
the uncertainty of dissipation caused by diffusion (Equ.17) is the greatest. When the density perturbation (rho') is calculated by rho-mean(rho), this term (sum of Equ.(16-18) ~20GW) is absolutely dominant and is obviously larger than that estimated by Equ.8
(rhs ~6GW). When the density <span style="display: inline !important; background-color: rgb(255, 255, 255);">
perturbation (rho')</span> is calculated by harmonic analysis, the result (<span style="display: inline !important; background-color: rgb(255, 255, 255);" class="ContentPasted7">sum of Equ.(16-18)<span class="ContentPasted7"> </span></span>~3GW) is smaller
than that estimated by <span style="display: inline !important; background-color: rgb(255, 255, 255);" class="ContentPasted2">
Equ.8</span>. I'm not sure that if the choice of parameterization scheme may lead to differences in the calculation of dissipation, so I would like to ask, in a model with only M2 internal tide, how can I use the given
<span style="display: inline !important; background-color: rgb(255, 255, 255);" class="ContentPasted3">
constant </span>parameters (viscosity, diffusion and bottom friction) to directly obtain the
<span style="display: inline !important; background-color: rgb(255, 255, 255);">disspation</span> generated by the internal tide?<br>
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Here is my "<span style="display: inline !important; background-color: rgb(255, 255, 255);" class="ContentPasted0">data" file setting:</span></div>
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# ====================
<div class="ContentPasted4"># | Model parameters |</div>
<div class="ContentPasted4"># ====================</div>
<div class="ContentPasted4">#</div>
<div class="ContentPasted4"># Continuous equation parameters</div>
<div class="ContentPasted4"> &PARM01</div>
<div class="ContentPasted4"> TrefFile='Tannualref', </div>
<div class="ContentPasted4"> sRef= 50*34.5,</div>
<div class="ContentPasted4"> viscAh=5.0,</div>
<div class="ContentPasted4"> viscAz=1.5E-4,</div>
<div class="ContentPasted4"> diffKhT=5.0,</div>
<div class="ContentPasted4"> diffKhS=5.0,</div>
<div class="ContentPasted4"> diffKzT=1.5E-5,</div>
<div class="ContentPasted4"> diffKzS=1.5E-5,</div>
<div class="ContentPasted4"> no_slip_sides=.FALSE.,</div>
<div class="ContentPasted4"> no_slip_bottom=.TRUE.,</div>
<div class="ContentPasted4"> bottomDragQuadratic=2.5E-3,</div>
<div class="ContentPasted4"> eosType='LINEAR',</div>
<div class="ContentPasted4"> staggerTimeStep=.TRUE.,</div>
<div class="ContentPasted4"> tAlpha=2.E-4,</div>
<div class="ContentPasted4"> sBeta =0E-4,</div>
<div class="ContentPasted4"> gravity=9.81,</div>
<div class="ContentPasted4"> implicitFreeSurface=.TRUE.,</div>
<div class="ContentPasted4"> exactConserv=.TRUE.</div>
<div class="ContentPasted4"> nonHydrostatic=.FALSE.,</div>
<div class="ContentPasted4"> useCoriolis=.TRUE.,</div>
<div class="ContentPasted4"> hFacMin=0.2,</div>
<div class="ContentPasted4"> hFacInf=0.2,</div>
<div class="ContentPasted4"> hFacSup=1.8,</div>
<div class="ContentPasted4"> tempStepping=.TRUE.,</div>
<div class="ContentPasted4"> saltStepping=.FALSE.,</div>
<div class="ContentPasted4">#- not safe to use globalFiles in multi-processors runs</div>
<div class="ContentPasted4">#globalFiles=.TRUE.,</div>
<div class="ContentPasted4"> readBinaryPrec=64,</div>
<div class="ContentPasted4"> writeBinaryPrec=32,</div>
<div class="ContentPasted4"> writeStatePrec=32,</div>
<div class="ContentPasted4"> useSingleCpuIO=.TRUE.,</div>
<div class="ContentPasted4"> &</div>
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Any reply or suggestion will be greatly appreciated.<br>
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-Mike</div>
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