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                                          <gco:CharacterString>Global Change Master Directory (GCMD) Keywords</gco:CharacterString>
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                              <gco:Date>2021-01-06</gco:Date>
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CTD profiles were measured with a Valeport SWiFT CTDplus, rated to 500 m, with an inbuilt optical sensor calibrated for turbidity measurements.  Manufacturer-cited accuracy was &amp;plusmn; 0.01 mS/cm for conductivity, +/- 0.01 degrees Celsius for temperature, and +/- 0.01 percent for pressure. Valeport Ocean software package was to manipulate, view and download the data from the CTD. Measurement were obtained every 0.1 m depth increment. The CTD was factory-calibrated in June 2023. The CTD operated in continuous mode and was deployed on the legs of the drop camera frame or by using a hand-spooled winch from a small boat at 20 sites around Rothera Point, with the objective of characterising water conditions across the survey area at three different time points during the 2023/24 austral summer. The available data are from the DOWN-casts only.
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CTD + turbidity (Valeport SWiFT)
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The CTD was calibrated by Valeport.</gco:CharacterString>
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