{"id":29309,"date":"2026-07-28T10:11:26","date_gmt":"2026-07-28T08:11:26","guid":{"rendered":"https:\/\/www.mio.osupytheas.fr\/?p=29309"},"modified":"2026-07-28T10:17:37","modified_gmt":"2026-07-28T08:17:37","slug":"mission-whirls","status":"publish","type":"post","link":"https:\/\/www.mio.osupytheas.fr\/en\/mission-whirls\/","title":{"rendered":"WHIRLS Mission"},"content":{"rendered":"
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The WHIRLS mission off the coast of South Africa is coming to an end. It involves two research vessels: the Marion Dufresne (MD) on the one hand, and the South African icebreaker Agulhas 2 on the other.<\/p>

For a month and a half, we mainly sampled a dipole (a cyclonic and an anticyclonic vortex) separated by a front. This is a hydrological structure generated by the Aiguilles Current as it flows south of South Africa, which has significant consequences for the transport of physical and biogeochemical properties in the Atlantic.<\/p>

In particular, the MD carried out hydrological measurements using the new MVP recently acquired by Sabrina Speich. Various strategies were implemented on board the Agulhas 2, including high-frequency transects involving only surface continuous sampling, short-duration stations sampled at high frequency day and night, and longer-duration stations (two transects of nine stations) where flux measurements were also taken.<\/p>

Together with Karine Leblanc, we mainly contributed to the measurements of carbon and silica stocks and fluxes, whilst also taking numerous samples to study phytoplankton diversity: in particular, Karine discovered two new diatom assemblages containing Tintinidae species not yet recorded.<\/p>

Today, weather permitting, we should be cross-checking the measurement results obtained using the CTD-rosette from the two vessels, which have come together for this purpose, but it is not certain that the forecast 40-knot winds will allow us to do so!<\/p>

Contact<\/strong> : Thierry Moutin<\/a><\/p>

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La mission WHIRLS au large de l’Afrique du Sud se termine. Elle implique 2 navires oc\u00e9anographiques, le Marion Dufresne (MD) d’une part et d’autre part le brise glace Agulhas 2 […]<\/p>\n","protected":false},"author":319,"featured_media":29310,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[17,1,27],"tags":[],"class_list":["post-29309","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-la-une","category-actualites","category-mediation-scientifique"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/29309","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\/319"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/comments?post=29309"}],"version-history":[{"count":7,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/29309\/revisions"}],"predecessor-version":[{"id":29318,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/29309\/revisions\/29318"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media\/29310"}],"wp:attachment":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media?parent=29309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/categories?post=29309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/tags?post=29309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}