BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Past Abrupt Climate Change and Freshwater Forcing: What do we know
 ? - Alan Condron\, University of Massachusetts
DTSTART:20131022T153000Z
DTEND:20131022T163000Z
UID:TALK44924@talks.cam.ac.uk
CONTACT:Natalie Roberts
DESCRIPTION:Many periods of Abrupt Climate change during the last deglacia
 tion begin with a catastrophic meltwater flood to the North Atlantic (e.g.
  Younger Dryas\, 8.2-kyr-event). Yet\, there appears to be no obvious conn
 ection between the volume of meltwater released to the ocean and the sever
 ity or duration of the cooling that followed. Here I present results from 
 a series of very high-resolution numerical ocean model simulations to show
  that the geographical source of the meltwater plays a key role in the ove
 rall response of the AMOC to freshwater forcing. I will initially look at 
 an ‘8.2-kyr’ simulation and show - somewhat contrary to the 'classic' 
 idea that meltwater covered the subpolar North Atlantic with freshwater - 
 that meltwater might have been transported to the subtropical North Atlant
 ic. In a second experiment I use the same high-resolution model to try and
  figure out whether an Arctic (Mackenzie River) or Eastern (St. Lawrence R
 iver) freshwater route to the ocean triggered the Younger Dryas cold episo
 de ~13\,000 years ago. I conclude by discussing some of the 'pros' and 'co
 ns' of using high-resolution models to study these events\, and also discu
 ss my ongoing research looking at the transport of icebergs into the subtr
 opics during Heinrich Events. \n\nFor more information see:\nhttp://www.pn
 as.org/content/109/49/19928.full.pdf+html 
LOCATION:Harker 1 seminar room\, Department of Earth Sciences
END:VEVENT
END:VCALENDAR