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SUMMARY:Turbulent plumes in the Southern Ocean - Paul Holland (BAS)
DTSTART:20110215T130000Z
DTEND:20110215T140000Z
UID:TALK29269@talks.cam.ac.uk
CONTACT:Doris Allen
DESCRIPTION:The talk will discuss results from reduced-equation modelling 
 of two cases of buoyancy-driven plumes important to the Southern Ocean.  T
 he first case is of dense shelf waters spilling over the continental shelf
  break and descending into the abyss to form Antarctic Bottom Water (AABW)
 .  Recent observations have highlighted the important effects of tides on 
 such plumes\, and a reduced model suggests that it is the effect of tides 
 on the supply of shelf waters\, rather than variable mixing of the plume a
 s it descends\, that is most important in modulating the formation of AABW
 .  The second case is of buoyant meltwater plumes rising up the base of gl
 acial ice shelves.  The meltwater freezes as it rises\, and recent observa
 tions and reduced modelling show that this process may be responsible for 
 stabilising rifts and crevasses in Larsen C Ice Shelf\, strengthening it a
 gainst the climate-change-driven collapse that has befallen its neighbours
 .\n 
LOCATION:CMS\, MR15
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