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Samples were taken for inorganic nutrients, iron and trace metals, bioluminescence and microscope analysis. Additionally, Line G, part of the SAMS observation network of the Scottish continental shelf was completed. The 2010 occupation, RRS Discovery Cruise 351, was completed successfully with 48 CTD stations worked between the Iceland and Scotland shelf edges. The section monitors the characteristics of the warm water inflow into the Nordic Seas and thence to the Arctic, and observes part of the returning cold water outflow with measurements of the Iceland-Scotland Overflow and the overflow of the Wyville-Thomson Ridge into the Rockall Trough.

The data form a 35 year time-series of the oceanic conditions west of the British Isles.

In 1996 the line was extended to Iceland and occupied approximately annually. The original Ellett Line across the Rockall Trough was first occupied in 1975 when measurements were attempted four times a year.

The Extended Ellett Line is a full-depth hydrographic section between Iceland, 60°N 20°W, Rockall and Scotland.

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