http://moocs.southampton.ac.uk/oceans/2015/08/31/what-do-the-oceans-mean-to-me/ Exploring our Oceans Mon, 04 Jan 2021 05:40:08 +0000 hourly 1 https://wordpress.org/?v=5.0.14 http://moocs.southampton.ac.uk/oceans/2015/08/31/what-do-the-oceans-mean-to-me/#comment-238189 Wed, 30 Sep 2015 15:59:37 +0000 http://moocs.southampton.ac.uk/oceans/?p=1424#comment-238189 Some of the technology used looks fascinating, and the scientific knowledge gained from this can only help, once it is all collected together.

]]> http://moocs.southampton.ac.uk/oceans/2015/08/31/what-do-the-oceans-mean-to-me/#comment-230443 Mon, 31 Aug 2015 15:06:30 +0000 http://moocs.southampton.ac.uk/oceans/?p=1424#comment-230443 Hello, we use multicorers at a range of depths, well over 4000m. Multicorers take a number of small cores, up to 60cm long to capture the sediment water interface, but we use a piston corer for longer cores. This is a tube up to 40m long, with a varying weight at the top (1.5-5T). It has a small trigger corer attached, which descends ahead of the piston corer. There is about 10m of slack attached to to the trigger weight, which releases and allows the piston to sink faster into the sediment. The length of core retrieve really depends on the nature of the material cored,any sand or pebble layers normally stop the corer, and can sometimes break it. We have cores stored at NOC that have been retrieved over the last 40 years from depths up to 6500m.

]]> http://moocs.southampton.ac.uk/oceans/2015/08/31/what-do-the-oceans-mean-to-me/#comment-230440 Mon, 31 Aug 2015 14:35:31 +0000 http://moocs.southampton.ac.uk/oceans/?p=1424#comment-230440 Presumably this multicorer is for use in fairly shallow water (like an augur?)? What is used at greater depths?

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