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<div><span></span><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">Dear MITgcm,<br><br> First of all I want to wish everyone a happy new year. </span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> And here is my question. </span><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">I am trying to model nonliear internal waves with two open boundaries </span><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">without free surface (rigid lid) in 2D </span></div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">in </span><span style="background-color: rgba(0, 0, 0, 0);">nonHydrostatic<span style="font-size: 10.5pt; line-height: 1.5;">. </span></span><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">In the model setup, I input the b</span><span style="font-size: 10.5pt; line-height: 1.5; background-color: transparent;">arotropic tide at west and east boundaries over the bottom topography, and want the </span></div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">barotropic tide can </span><span style="font-size: 10.5pt; line-height: 1.5; background-color: transparent;">evolve into nonlinear internal wave(internal solitary wave). dx is set to 50m and dz is set to 5m. dt is 5s. However, </span></div><div><span style="font-size: 10.5pt; line-height: 1.5; background-color: transparent;">the T of the model output is filled with </span><span style="font-size: 10.5pt; line-height: 1.5; orphans: 2; widows: 2; background-color: transparent;">noises </span><span style="font-size: 10.5pt; line-height: 1.5; orphans: 2; widows: 2; background-color: transparent;">and I can not identify the wave signal(its lenght scale is about several hundred meters). </span></div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">I've tried to set various dx, dz and dt steps, but </span><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">without positive </span><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">result. And I also tried the </span><span style="font-size: 10.5pt; line-height: 1.5; background-color: transparent;">Laplacian viscosity coefficient changing </span></div><div><span style="font-size: 10.5pt; line-height: 1.5; background-color: transparent;">from 1e-5 to 1e-1, some very small noise have been </span><span style="font-size: 10.5pt; line-height: 1.5; background-color: transparent;">removed, but </span><span style="font-size: 10.5pt; line-height: 1.5; background-color: transparent;">there are still some large noises. </span></div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);"> </span><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">I put the pictures with contour T plot of the 72 h 's modeling result and the 'data' set in attached. The red line in T.jpg is the bottom </span><span style="font-size: 10.5pt; line-height: 1.5; background-color: transparent;">topography.</span></div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);"> </span><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">Could you tell me how should I modify my model setup for </span><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">clearing the model? </span></div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);"> Best regards.</span></div><hr style="WIDTH: 210px; HEIGHT: 1px" color="#b5c4df" size="1" align="left">
<div><span><div style="MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"><div>JIATONG</div></div></span></div>
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