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Unformatted text preview: Geol 107 L14 9/26/2011 1 Thermohaline Circulation THC conveyor belt cartoon IPCC version Wally Broecker, LDEO 2006 Crafoord Prize in Geosciences Thermohaline Circulation (T H) The pattern of density driven deep ocean current movement Results in (large scale) vertical mixing of the ocean Thermohaline Circulation how it works Increases in water density cause water to sink until it reaches water of comparable density Water in deep oceans gets there because it is most dense (coolest and/or most salty) Deep ocean currents move the cold, saline waters around the world http://www.youtube.com/watch?v=nA q9LXLXISk T H vs Surface Circulation Flow of deep water does not look like the wind driven surface driven surface currents Geol 107 L14 9/26/2011 2 How fast does T H circulation go? Ocean circulation is measured in Sverdrups = 1x10 6 m 3 /sec Oceanic thermohaline circulation involves 20 30 Sv....
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- Spring '11