{"id":57799,"date":"2023-06-06T14:28:51","date_gmt":"2023-06-06T12:28:51","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=57799"},"modified":"2024-06-21T17:12:45","modified_gmt":"2024-06-21T15:12:45","slug":"seminaire-de-likun-zhang-ocean-exploration-energetics-acoustic-effects-and-imaging-of-internal-waves","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/actualites\/seminaire-de-likun-zhang-ocean-exploration-energetics-acoustic-effects-and-imaging-of-internal-waves.html","title":{"rendered":"Likun ZHANG's seminar: Ocean Exploration: Energetics, Acoustic effects and Imaging of Internal waves"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-rg485j-274d10b33bbef8c1c0100a02b06e45d9\">\n.flex_column.av-rg485j-274d10b33bbef8c1c0100a02b06e45d9{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-rg485j-274d10b33bbef8c1c0100a02b06e45d9 av_one_full  avia-builder-el-0  el_before_av_one_full  avia-builder-el-first  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-lik9bomu-14a8e7d23aa7ccd55b21abbdbb76d303'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2 style=\"text-align: center;\">Seminar<\/h2>\n<blockquote>\n<p style=\"text-align: center;\"><strong>Vendredi 9 juin 2023 de 11h30 \u00e0 12h30 \u2013 Amphi. du LCI<\/strong><\/p>\n<\/blockquote>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-rtc1s7-e13195d2514f71e5fc3520b2eb5b5a6e\">\n.flex_column.av-rtc1s7-e13195d2514f71e5fc3520b2eb5b5a6e{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-rtc1s7-e13195d2514f71e5fc3520b2eb5b5a6e av_one_full  avia-builder-el-2  el_after_av_one_full  avia-builder-el-last  first flex_column_div av-zero-column-padding  column-top-margin'     ><section  class='av_textblock_section av-lik9imxm-e8757c4e23d264559a7f7498253f2731'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h4 style=\"font-weight: 400; text-align: center;\">Ocean Exploration: Energetics, Acoustic Effects, and Imaging of Internal Waves<\/h4>\n<hr \/>\n<p><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/06\/seminaire_ocean_acoustique.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-57802 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/06\/seminaire_ocean_acoustique.jpg\" alt=\"\" width=\"1000\" height=\"441\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/06\/seminaire_ocean_acoustique.jpg 1000w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/06\/seminaire_ocean_acoustique-300x132.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/06\/seminaire_ocean_acoustique-768x339.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/06\/seminaire_ocean_acoustique-18x8.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/06\/seminaire_ocean_acoustique-705x311.jpg 705w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/p>\n<h4>Likun Zhang<\/h4>\n<p><em>National Center for Physical Acoustics and Department of Physics and Astronomy<\/em><br \/>\n<em>University of Mississippi, USA<\/em><\/p>\n<p>Ocean exploration plays a vital role in climate studies. In particular, oceanic internal waves are waves in the ocean interior that transfer heats and lead to ocean mixing. These waves also affect the fidelity of acoustic signals used in communication and imaging in the oceans. With the aid of knowledge in fluid dynamics and acoustics, we take the approaches of simulations, laboratory measurements, and field data analysis to investigate dynamics and energetics of oceanic internal waves and their effects on underwater sound propagation. The investigations also improve our ability of using acoustic signals to image ocean dynamics. This talk will report our simulations on generation of internal waves by tidal flow over submarine topography such as ridges and seamounts, our laboratory experiments on sound propagation through internal waves produced by a wave generator placed in a density-stratified fluid, and our analysis of acoustic signals in existing marine seismic dataset to study the temporal evolution of internal wave fields in high-resolution acoustic images.<\/p>\n<\/div><\/section><\/div><\/p>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":66006,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-57799","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/57799","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=57799"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/57799\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/66006"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=57799"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=57799"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=57799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}