<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div style="font-family: Tahoma, Geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof ContentPasted0">
<span style="font-size: 14pt;"><b><i>"Numerical Exploration of the Ocean Circulation on Icy Moons"</i></b></span>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0"><span style="font-size: 14pt;"><b>John Marshall</b></span></div>
<div class="ContentPasted0">Professor of Ocean and Climate Science,</div>
<div class="ContentPasted0">Massachusetts Institute of Technology (MIT), Cambridge, MA</div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">NOTE: Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic.
<b>All are welcome to attend. </b></div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0"><i style=""><b>Note: </b>Zoom access is for non-departmental participants only. </i></div>
<div class="ContentPasted0"><b>https://fsu.zoom.us/j/94273595552 </b></div>
<div class="ContentPasted0">Meeting # <b>942 7359 5552 </b></div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">🎦 Colloquium recordings will be made available here,
<a href="https://www.sc.fsu.edu/colloquium" id="OWAe1075e0f-163c-89ad-9268-4cfe102ea17f" class="OWAAutoLink">
https://www.sc.fsu.edu/colloquium</a> </div>
<div class="ContentPasted0"><b>Wednesday, Oct 18</b>, 2023, Schedule: </div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">* <b>3:00</b> to 3:30 PM Eastern Time (US and Canada)
</div>
<div class="ContentPasted0">☕ <b>Nespresso & Teatime</b> - 417 DSL Commons </div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">* <b>3:30</b> to 4:30 PM Eastern Time (US and Canada)
</div>
<div class="ContentPasted0">🕟 <b>Colloquium</b> - 499 DSL Seminar Room </div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0"><b>Abstract: </b></div>
<div class="ContentPasted0">Subsurface oceans on the icy moons of our Solar System, such as Enceladus and Europa, are receiving increasing attention in the search for extraterrestrial life. It is thus important to understand the dynamics of these oceans and
identify circulation pathways and timescales. Here, we use numerical simulations to explore likely ocean circulations if the primary energy source is geothermal heating from below. Codes developed in Julia and deployed on GPUs are used.</div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">We describe the phenomenology of the resulting circulation patterns as the assumed rotation rate and ocean depth is varied. Key non- dimensional numbers are identified, and used to organize our study, informing speculations about
the nature of the circulation of real icy moons. Based on best estimates of controlling non-dimensional parameters, we argue that the ocean circulations on Europa and Enceladus are likely to be very strongly influenced by rotation and manifest multiple alternating
bands of zonal currents flowing in opposite direction, with distinctly different tropical and extratropical regimes. The likely nature of the small-scale turbulence and convection excited by bottom heating, which energizes the zonal jets, is also described.</div>
<div><br class="ContentPasted0">
</div>
<div class="ContentPasted0">Additional colloquium details can be found here, </div>
<a href="https://www.sc.fsu.edu/news-and-events/colloquium/1753-gfdi-colloquium-with-john-marshall-2023-10-18" id="OWAa1521796-bf29-e937-813f-5519c361172b" class="OWAAutoLink">https://www.sc.fsu.edu/news-and-events/colloquium/1753-gfdi-colloquium-with-john-marshall-2023-10-18</a>
<br>
</div>
</body>
</html>