{"id":3982,"date":"2016-08-21T22:20:41","date_gmt":"2016-08-22T02:20:41","guid":{"rendered":"http:\/\/mseas.mit.edu\/?p=3982"},"modified":"2022-11-21T21:11:03","modified_gmt":"2022-11-22T02:11:03","slug":"internal-tides-near-steep-topographies","status":"publish","type":"post","link":"https:\/\/mseas.mit.edu\/?p=3982","title":{"rendered":"Internal Tides Near Steep Topographies"},"content":{"rendered":"The primary contributions of this thesis include the first stages of development of a 2D, finitevolume,\nnon-hydrostatic, sigma-coordinate code and beginning to apply the Dynamically Orthogonal\nfield equations to study the sensitivity of internal tides to perturbations in the density field. First, we\nensure that the 2D Finite Volume (2DFV) code that we use can accurately capture non-hydrostatic\ninternal tides since these dynamics have not yet been carefully evaluated for accuracy in this framework.\nWe find that, for low-aspect ratio topographies, the -coordinate mesh in the 2DFV code\nproduces numerical artifacts near the bathymetry. To ameliorate these staircasing effects, and to\ndevelop the framework towards a moving mesh with free-surface dynamics, we have begun to implement\na non-hydrostatic sigma-coordinate framework which significantly improves the representation\nof the internal tides for low-aspect ratio topographies. Finally we investigate the applicability of\nstochastic density perturbations in an internal tide field. We utilize the Dynamically Orthogonal\nfield equations for this investigation because they achieve substantial model order reduction over\nensemble Monte-Carlo methods.","protected":false},"excerpt":{"rendered":"<p>The primary contributions of this thesis include the first stages of development of a 2D, finitevolume, non-hydrostatic, sigma-coordinate code and beginning to apply the Dynamically Orthogonal field equations to study the sensitivity of internal tides to perturbations in the density field. First, we ensure that the 2D Finite Volume (2DFV) code that we use can [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42,5,44],"tags":[221,222,229],"class_list":["post-3982","post","type-post","status-publish","format-standard","hentry","category-meche-theses","category-publications","category-masters-theses","tag-fleat","tag-ioda","tag-shelf-it"],"_links":{"self":[{"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/posts\/3982","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3982"}],"version-history":[{"count":3,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/posts\/3982\/revisions"}],"predecessor-version":[{"id":4006,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/posts\/3982\/revisions\/4006"}],"wp:attachment":[{"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3982"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3982"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}