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SUMMARY:Ash\, Ice\, Mud: Tephras and Rapid Climate Changes - Professor Siw
 an Davies\, Geography\, Swansea University
DTSTART:20141023T151500Z
DTEND:20141023T170000Z
UID:TALK54167@talks.cam.ac.uk
CONTACT:Ave Lauren
DESCRIPTION:Little has challenged our understanding of climate change more
  so than the abruptness with which large-scale shifts in temperature occur
 red during the last glacial period. Atmospheric temperature jumps occurrin
 g within decades over Greenland were closely matched by rapid changes in N
 orth Atlantic sea surface temperatures and major re-organisation of the de
 ep ocean circulation. Although these climatic instabilities are well-docum
 ented in various proxy records\, the causal mechanisms of such short-lived
  oscillations remain poorly understood\, largely due to the dating uncerta
 inties that prevent the integration of different archives. This talk explo
 res how microscopic traces of volcanic events can be used to precisely cor
 relate the Greenland ice-cores with North Atlantic marine records. These t
 ime-lines are used to constrain the lead/lag responses between the atmosph
 eric and oceanic systems during the last glacial period. 
LOCATION:Small Lecture Theatre\, Department of Geography\, Downing Site
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