{"id":1599,"date":"2022-06-14T06:00:20","date_gmt":"2022-06-14T06:00:20","guid":{"rendered":"https:\/\/sites.rutgers.edu\/pufins-at-sea\/?p=1599"},"modified":"2022-06-14T14:42:25","modified_gmt":"2022-06-14T14:42:25","slug":"water-sampling-with-a-ctd","status":"publish","type":"post","link":"https:\/\/sites.rutgers.edu\/pufins-at-sea\/water-sampling-with-a-ctd\/","title":{"rendered":"Water Sampling with a CTD"},"content":{"rendered":"

C<\/span>onductivity T<\/span>emperature D<\/span>epth<\/h1>\n

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C, T, and D, rosette, Niskin bottles: I needed a vocabulary lesson before I could write about the large device the team has been putting into the oc<\/span>ean to collect water samples at each of our stations.<\/span><\/p>\n

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\"\"c\u00a0<\/span><\/p>\n

The CTD; conductivi<\/span>ty, temperature, and depth device pictured above is a round steel framed rosette, housing 24 Niskin bottles and a several sensors. The CTD readers are found at the bottom, below the Niskin bottle.\u00a0 The C for Conductivity is often just said to represent salinity. <\/span>There are also oxygen sensors that tell us how much dissolved oxygen is present. <\/span>The Niskin bottles are named after the scientist Shale Niskin who worked to advance sea water collection techniques and <\/span>patented <\/span>the design in 1966.\u00a0<\/span>This particular CTD runs profiles of the water column (surface to bottom) and along the way, collects water samples (at specific predetermined depths) using the rosette of Niskin bottles.\u00a0<\/span><\/p>\n

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Day shift preparing CTD<\/figcaption><\/figure>\n