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SUMMARY:The role of convective chimneys in the Greenland Sea - Peter Wadha
 ms\, DAMTP
DTSTART:20080926T104500Z
DTEND:20080926T114500Z
UID:TALK13780@talks.cam.ac.uk
CONTACT:Dr C. P.  Caulfield
DESCRIPTION:Long-lived convective chimneys were discovered in the Greenlan
 d Sea in 1997 and during a subsequent EU-funded research programme called 
 CONVECTION were tracked in winter and summer cruises\; one chimney was obs
 erved for three years. It is found that they are rotating cylinders of dia
 meter 20 km\, with (in winter) uniform water from the surface to 2500 m. I
 n summer they become subsurface features as they are capped by low-salinit
 y surface water. Their properties were first discussed by Peter Killworth 
 but many mysteries remain\, including formation mechanism\, survival time 
 and volume of overturned water. Properties will be reviewed along with rec
 ent results from physical modelling.
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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