<div dir="ltr"><div class="gmail_quote"><br><div dir="ltr"><div><div style="overflow:auto"><div style="max-height:10000px"><div dir="ltr"><div><div style="overflow:auto"><div style="max-height:10000px"><div dir="ltr"><p style="text-align:center;clear:both"><a href="https://lh3.googleusercontent.com/-ZPFNPh16sR0/Wt39FrXUP-I/AAAAAAAAAaw/3wQunGe20lUopmV_ggfPaDwE9cVAgVzxgCLcBGAs/s1600/image001.jpg" style="margin-left:1em;margin-right:1em" target="_blank"><img src="https://lh3.googleusercontent.com/-ZPFNPh16sR0/Wt39FrXUP-I/AAAAAAAAAaw/3wQunGe20lUopmV_ggfPaDwE9cVAgVzxgCLcBGAs/s1600/image001.jpg" border="0"></a></p><br>
<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">DATE:</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> </span><span style="font-size:13.5pt;font-family:"Verdana",sans-serif;color:black"> </span><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif">Friday, May 4, 2018</span></b></p>
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<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">TITLE:</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> </span><b><font size="4"><span style="font-family:verdana,sans-serif"><span class="m_-5154335673531162454event-description"><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif"><span style="color:black">Hydrostatic and Nonhydrostatic Pressure in Ocean Models</span></span></b></span></span></font><span style="font-size:20.0pt;font-family:"Verdana",sans-serif"></span></b></p>
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<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">TIME:</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> </span><span style="font-size:13.5pt;font-family:"Verdana",sans-serif;color:black"> </span><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif">3<span style="color:black">:30PM</span></span></b></p>
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<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">LOCATION:</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <b> </b></span><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif">GMCS 314</span></b></p>
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<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">SPEAKER:</span><span style="font-size:13.5pt;font-family:"Verdana",sans-serif;color:black"> </span><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif">Paul Choboter, Ph.D.</span></b><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif">,
Mathematics Department, California Polytechnic State University<br></span></b></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif;color:black">ABSTRACT:</span></p><font size="4"><span class="m_-5154335673531162454event-description">In fluids, spatial variations in pressure generate forces that can accelerate the fluid. The dominant pressure gradient in the ocean is the increase in pressure as you move down into deeper water. However, this pressure gradient largely causes no acceleration because the vertical pressure gradient is in near-perfect balance with the force of gravity. The assumption that the vertical pressure gradient is in perfect balance with gravity is called the hydrostatic approximation. This approximation, known to be quite accurate at large scales, is common in ocean modeling. Relaxing the hydrostatic approximation to account for nonhydrostatic pressure gradients in ocean models turns out to be a significant numerical challenge because you need to compute the relatively small difference between two large terms. In this talk, the details of the hydrostatic approximation are explained, and the techniques of relaxing that approximation are discussed.</span></font><h2><br></h2><h2><span></span><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;font-weight:normal"><span></span></span><span><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;font-weight:normal"></span></span></h2>
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<h2><span style="font-size:11.0pt;font-family:"Verdana",sans-serif;color:black;font-weight:normal">HOST:</span><span style="font-family:"Verdana",sans-serif;color:#1f497d"> </span><span><span style="font-size:12.0pt;font-family:"Verdana",sans-serif;font-weight:normal">Jose Castillo</span></span><span></span></h2>
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<p class="MsoNormal"><span style="font-size:9.5pt;font-family:"Verdana",sans-serif;color:black">Dr. Jose
E. Castillo<br>
Director/Professor<br>
Computational Science Research Center<br>
<a href="https://maps.google.com/?q=5500+Campanile+Drive+%0D%0ASan+Diego&entry=gmail&source=g">5500 Campanile Drive</a><br>
San Diego State University<br>
San Diego, CA 92182-1245<br>
(619) 59407205/3430, FAX </span><a><span style="font-size:9.5pt;font-family:"Verdana",sans-serif">(619)
594-2459</span></a></p><span class="HOEnZb"><font color="#888888">
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