{"id":6611,"date":"2020-09-10T09:19:43","date_gmt":"2020-09-10T07:19:43","guid":{"rendered":"https:\/\/www.mio.osupytheas.fr\/fr\/test-vvp-en-rade-de-marseille\/"},"modified":"2020-09-10T09:19:43","modified_gmt":"2020-09-10T07:19:43","slug":"vvp-test-in-marseille-harbour","status":"publish","type":"post","link":"https:\/\/www.mio.osupytheas.fr\/en\/test-vvp-en-rade-de-marseille\/","title":{"rendered":"VVP test in Marseille harbour"},"content":{"rendered":"<div id=\"basic-page-content\" class=\"page-content\">    <div class=\"content\">    <div class=\"container\">      <div class=\"row\">        <div class=\"col-xs-12\">                      <div class=\"container clearfix\">              <div class=\"row\">                <div class=\"col-xs-12\">                                  <\/div>              <\/div>            <\/div>                                <div class=\"body\">              <div class=\"field field-name-body field-type-text-with-summary field-label-hidden\"><div class=\"field-items\"><div class=\"field-item even\" property=\"content:encoded\"><p class=\"rtejustify\">The study of vertical velocities is essential for a better understanding of the fine-scale dynamics of the ocean and their impact on biogeochemistry. However, measuring vertical velocities in situ is a real challenge, due to their low intensity (a few mm.s-1) and the ephemeral nature of fine-scale structures (1-10 days).<\/p><p class=\"rtejustify\">With this in mind, MIO scientists, as part of the <a href=\"https:\/\/www.mio.osupytheas.fr\/en\/ocean-dynamics\/bioswot-satellites-study-plankton\" target=\"_blank\" rel=\"noopener\">BIOSWOT-AdAC project<\/a> (PI: F. D'Ovidio, A. Doglioli and G. Gregori - CNES-funded project) are currently developing a new oceanographic device, the VVP (Vertical Velocity Profiler), the aim of which is to take direct in situ measurements of these vertical velocities. It is equipped with salinity, temperature and pressure sensors that process the data to calculate the vertical velocity based on the principle of Archimedes' buoyancy. Any deviation from its theoretical speed of fall is related to the vertical velocities, whether ascending or descending. The oceanographers (J-L. Fuda, S. Barrillon, D. Malengros, M. Lafont, R. Tzortzis) boarded the research vessel Astro\u00efdes on Wednesday 9 September 2020 to carry out the first sea trials of the VVP in the harbour of Marseille. A satellite beacon emits a signal to enable the onboard team to track the profiler when it returns to the surface after several dives. The VVP completed its first autonomous dives without any problems. New tests are soon planned further offshore. Stay tuned!<\/p><p class=\"rtejustify\">We would like to warmly thank the Service Atmosph\u00e8re Mer (SAM), and in particular Michel Lafont, Nagib Bhairy and Deny Malengros, for their significant contribution to the creation of this prototype.<\/p><p class=\"rtejustify\">\u00a0<\/p><p class=\"rtecenter\"><img fetchpriority=\"high\" decoding=\"async\" alt=\"\" src=\"\/wp-content\/uploads\/ancien-site\/images\/img_20200909_0847327bis.jpg\" style=\"width: 1000px; height: 1500px;\" width=\"1000\" height=\"1500\"><\/p><p class=\"rtecenter\"><em>Figure 1: Oceanographers improvise themselves as divers, to keep a close eye on the VVP test in Marseille harbour.<\/em><\/p><\/div><\/div><\/div>            <\/div>                            <\/div>      <\/div>    <\/div>  <\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>L\u2019\u00e9tude des vitesses verticales, appara\u00eet comme essentielle pour mieux comprendre la dynamique define \u00e9chelle de l\u2019oc\u00e9an, et l\u2019impact sur la biog\u00e9ochimie. Cependant la mesure in situ des vitesses verticales est [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4489,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6611","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/6611","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/comments?post=6611"}],"version-history":[{"count":0,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/6611\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media\/4489"}],"wp:attachment":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media?parent=6611"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/categories?post=6611"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/tags?post=6611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}