{"id":1251,"date":"2022-06-12T09:36:18","date_gmt":"2022-06-12T09:36:18","guid":{"rendered":"https:\/\/www.oceanblogs.org\/capeverde\/?p=1251"},"modified":"2022-06-30T12:19:54","modified_gmt":"2022-06-30T12:19:54","slug":"m182-the-moses-eddy-hunt-begins","status":"publish","type":"post","link":"https:\/\/www.oceanblogs.org\/capeverde\/2022\/06\/12\/m182-the-moses-eddy-hunt-begins\/","title":{"rendered":"#M182 The MOSES Eddy Hunt Begins"},"content":{"rendered":"\n<p>As part of the Helmholtz Earth system observation program MOSES, researchers from the GEOMAR Helmholtz Centre for Ocean Research Kiel departed on the third expedition to investigate oceanic eddies between Cape Verde and Mauritania.<\/p>\n\n\n\n<p>The second week of M182 marks the start of the eddy hunting phase. \u201cEddies are circular currents that can either upwell or downwell nutrients in midst of the oligotrophic ocean\u201d, explains Quentin Devresse a doctoral researcher supervised by Prof. Dr. Anja Engel in the BMBF-funded project REEBUS. Eddies are a widespread feature in the ocean, but finding one is still quite difficult. The first step to finding an eddy is to look at the sea level height anomaly detected by satellites, which shows elevations and depressions of the ocean surface. For example, think of a grass meadow: the meadow may look flat from a far, but a closer look will present tiny hills and troughs. After using the sea level anomaly to identify the general vicinity of an eddy, \u201cwe are going to use the sensors mounted to the CTD to characterize the upper 1500 meter of the water column\u201d, says Prof. Dr. Jens Greinert, the chief scientist of M182. The CTD is an instrument that provides important information on the physical, chemical, and partially biological properties of the water column. \u201cAdditionally, an acoustic doppler current profiler helps to identify the direction of the ocean current in the upper 800m using the doppler effect between the four send out acoustic signals\u201d, Greinert continues.<\/p>\n\n\n\n<p>The scientists onboard RV Meteor started identifying a potential eddy on 9<sup>th<\/sup> of July 2022. Since the 10<sup>th<\/sup> of July 00:13 UTC, the team of Prof. Dr. Anja Engel has deployed more than 20 CTDs every 8 nautical miles to characterize the upper 1500 meter of an eddy that has a diameter of 130 kilometers.<\/p>\n\n\n\n<p>Follow the expedition on our Instagram channel @oceanstories.ebus and find the weekly report on www.ldf.uni-hamburg.de\/en\/meteor\/wochenberichte<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.oceanblogs.org\/capeverde\/wp-content\/uploads\/sites\/6\/2022\/06\/20220611_eddy_M182.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"348\" height=\"743\" src=\"https:\/\/www.oceanblogs.org\/capeverde\/wp-content\/uploads\/sites\/6\/2022\/06\/20220611_eddy_M182.gif\" alt=\"\" class=\"wp-image-1253\" \/><\/a><figcaption>Picture: Animation of sea level height anomaly. Source: GEOMAR\/ Animation der Meeresspiegelanomalie<\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">#M182 Die Wirbeljagt Beginnt<\/h1>\n\n\n\n<p>Im Rahmen des Helmholtz-Erdsystembeobachtungsprogramms MOSES sind Forscher des GEOMAR Helmholtz-Zentrums f\u00fcr Ozeanforschung Kiel zur dritten Expedition aufgebrochen, um Ozeanwirbel (English \u201eeddy\u201c) zwischen den Kapverdischen Inseln und Mauretanien zu untersuchen.<\/p>\n\n\n\n<p>In der zweiten Woche von M182 begann die Phase der Wirbeljagd. &#8220;Ozeanwirbel sind kreisf\u00f6rmige Str\u00f6mungen, die inmitten des oligotrophen Ozeans entweder N\u00e4hrstoffe auf- oder abbef\u00f6rdern k\u00f6nnen&#8221;, erkl\u00e4rt Quentin Devresse, Doktorand bei Prof. Dr. Anja Engel im BMBF-gef\u00f6rderten Projekt REEBUS. Wirbel sind im Ozean weit verbreitet, aber sie zu finden ist immer noch recht schwierig. Der erste Schritt, um einen Ozeanwirbel zu finden, ist ein Blick auf die von Satelliten erfasste Anomalie des Meeresspiegelanomalie zu werfen. Darauf sind die Erhebungen und Vertiefungen des Ozeans zu erkennen. Stellen Sie sich zum Beispiel eine Wiese vor: Von weitem mag die Wiese flach aussehen, aber bei n\u00e4herem Hinsehen erkennt man kleine H\u00fcgel und Mulden. Nachdem die Anomalien festgestellt worden sind, um den Bereich eines Ozeanwirbels zu identifizieren, &#8220;werden wir die Sensoren der CTD nutzen, um die oberen 1500 Meter der Wassers\u00e4ule zu charakterisieren&#8221;, sagt Prof. Dr. Jens Greinert, der Fahrtleiter von M182. Die CTD ist ein Instrument, das wichtige Informationen \u00fcber die physikalischen, chemischen und teilweise biologischen Eigenschaften der Wassers\u00e4ule liefert. &#8220;Zus\u00e4tzlich hilft ein akustischer Doppler-Str\u00f6mungsprofiler dabei, die Richtung der Meeresstr\u00f6mung in den oberen 800 Metern durch den Dopplereffekt zwischen den vier ausgesandten akustischen Signalen zu bestimmen&#8221;, so Greinert weiter.<\/p>\n\n\n\n<p>Die Wissenschaftler an Bord von der FS Meteor begannen am 9. Juli 2022 mit der Identifizierung eines m\u00f6glichen Ozeanwirbels. Seit dem 10. Juli 00:13 UTC hat das Team von Prof. Dr. Anja Engel mehr als 20 CTDs alle 8 Seemeilen aussetzt und ausgewertet, um einen m\u00f6glichen Ozeanwirbels mit einem Durchmesser von 130 Kilometern zu charakterisieren.<\/p>\n\n\n\n<p>Verfolgt die Expedition auf unserem Instagram-Kanal @oceanstories.ebus und findet den detaillierten Wochenbericht auf https:\/\/www.ldf.uni-hamburg.de\/meteor\/wochenberichte.html<\/p>\n\n\n\n<p>This blog was prepared by Anabel von Jackowski from GEOMAR Helmholtz Centre for Ocean Research Kiel.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As part of the Helmholtz Earth system observation program MOSES, researchers from the GEOMAR Helmholtz Centre for Ocean Research Kiel departed on the third expedition to investigate oceanic eddies between Cape Verde and Mauritania. The second week of M182 marks the start of the eddy hunting phase. \u201cEddies are circular currents that can either upwell [&hellip;]<\/p>\n","protected":false},"author":233,"featured_media":1252,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-1251","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ozeanbeobachtung"],"geo":null,"_links":{"self":[{"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/posts\/1251","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/users\/233"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/comments?post=1251"}],"version-history":[{"count":3,"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/posts\/1251\/revisions"}],"predecessor-version":[{"id":1269,"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/posts\/1251\/revisions\/1269"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/media\/1252"}],"wp:attachment":[{"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/media?parent=1251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/categories?post=1251"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oceanblogs.org\/capeverde\/wp-json\/wp\/v2\/tags?post=1251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}