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SUMMARY:Ice cores\, climate and interglacials - Prof. Eric Wolff\, BAS
DTSTART:20121105T170000Z
DTEND:20121105T180000Z
UID:TALK39403@talks.cam.ac.uk
CONTACT:Lois Salem
DESCRIPTION:The polar ice sheets hold one of Earth’s great sedimentary r
 ecords.  By drilling ice cores from Greenland and Antarctica\, we can obta
 in ice that fell as snow\, extending back so far 800\,000 years in Antarct
 ica and over 120\,000 years in Greenland.  Ice cores contain information a
 bout climate and numerous other environmental parameters\; crucially the a
 ir bubbles trapped in the ice give access to the past composition of the a
 tmosphere\, including the greenhouse gas concentrations.  In this talk I w
 ill first discuss the strengths and weaknesses of ice cores\, and then dem
 onstrate how ice cores are collected.  I will then present a few examples 
 of the knowledge we have gained from ice cores – about greenhouse gases\
 , about glacial/interglacial cycles\, and about rapid climate changes most
  likely induced by changes in ocean heat transport.  A particular focus of
  the talk will be on interglacials: warm periods within the later part of 
 the Quaternary.  Are there rules that govern the timing of glacial termina
 tions and inceptions\, and the strength of interglacials such as the prese
 nt one?  Finally I will discuss prospects for obtaining even older ice in 
 the future.
LOCATION:Harker Room 1\, Department of Earth Sciences
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