{"id":57,"date":"2022-08-19T22:00:00","date_gmt":"2022-08-19T21:00:00","guid":{"rendered":"https:\/\/www.oceanblogs.org\/meteor184\/?p=57"},"modified":"2022-09-01T17:49:37","modified_gmt":"2022-09-01T16:49:37","slug":"surface-to-the-ocean-floor-survey-with-the-ctd-rosette","status":"publish","type":"post","link":"https:\/\/www.oceanblogs.org\/meteor184\/2022\/08\/19\/surface-to-the-ocean-floor-survey-with-the-ctd-rosette\/","title":{"rendered":"Surface to the Ocean Floor Survey with the CTD-Rosette"},"content":{"rendered":"\n

By Anne-Sophie Fortin <\/p>\n\n\n\n

\"Conductivity
Left: The CTD-Rosette is on the deck, ready to dive to the ocean floor. Right: Paula and Elizabeth are sampling seawater from the Niskin bottles. The temperature of the seawater sampled is very cold for our hands (it can be as low as -1o<\/sup>C).<\/figcaption><\/figure>\n\n\n\n

As we move along the 53o<\/sup>N Array, we are performing \u201cCTD casts\u201d which consist of lowering a CTD-Rosette to the ocean floor and pulling it back up on deck. A CTD is an instrument that precisely measures the Conductivity and Temperature at every Depth. We can then compute the salinity from the conductivity and the temperature. A Rosette samples seawater at selected depths in so-called \u201cNiskin bottles\u201d. From an analysis of the seawater, we can determine the concentration of nutrients, salt, dissolved oxygen, and dissolved inorganic carbon.<\/p>\n\n\n\n

The CTD casts also serve to calibrate the moored instruments of the 53o<\/sup>N Array<\/a>. To do so, we attach the instrument to the CTD-Rosette in between their recovery<\/a> and deployment<\/a>. The pair of datasets that are generated by the instruments belonging to the 53o<\/sup>N Array and the CTD is then used for the instrument calibrations.<\/p>\n\n\n\n

Koordinaten: 53.195, -50.627167<\/p>\n","protected":false},"excerpt":{"rendered":"

By Anne-Sophie Fortin As we move along the 53oN Array, we are performing \u201cCTD casts\u201d which consist of lowering a CTD-Rosette to the ocean floor and pulling it back up on deck. A CTD is an instrument that precisely measures the Conductivity and Temperature at every Depth. We can then compute the salinity from the […]<\/p>\n","protected":false},"author":238,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,3],"tags":[4],"class_list":["post-57","post","type-post","status-publish","format-standard","hentry","category-at-sea","category-auf-see","tag-ctd"],"_links":{"self":[{"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/posts\/57","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/users\/238"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/comments?post=57"}],"version-history":[{"count":5,"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/posts\/57\/revisions"}],"predecessor-version":[{"id":113,"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/posts\/57\/revisions\/113"}],"wp:attachment":[{"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/media?parent=57"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/categories?post=57"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oceanblogs.org\/meteor184\/wp-json\/wp\/v2\/tags?post=57"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}