Highsea III – 2004-2007

Expedition in February 2006 with the brig Roald Amundsen

Research question: Does the Taylor acid formation at sea mountains also occur during the winter?

Sea mountains are individual “mountains” that rise several thousand meters from a flat deep sea area. These mountains reach up to just below the surface and stand in ocean currents. Due to various factors a circular flow occurs – at least during the summer. These circuit currents are of great importance for the life around the sea mountains. Nutrients accumulate; there is more plankton and therefore also more fish. It is questionable whether these circuit currents are also present in the winter, and if they are as strong as the currents in the summer.

What did the students do?
They took measurements with the CTD (confer to the description of the Highsea II expedition). There was no electronic winch available for the CTD on this expedition. Therefore, the students lowered and retrieved the probe from the water by hand. They used an apparutus with a weight of more than 100 kg and a measuring depth of 1400 m. This was long-lasting hard work. The data was then analyzed directly on board for the first time and “cuts” were marked.

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