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SUMMARY:Reconstructing CO2 change on 100 to 100 million year timescales - 
 James Rae\, University of St. Andrews
DTSTART:20220127T150000Z
DTEND:20220127T160000Z
UID:TALK162790@talks.cam.ac.uk
CONTACT:Oscar Branson
DESCRIPTION:CO2 change amplified the ice ages of the Quaternary\, drove gl
 obal cooling through the Cenozoic\, and may have contributed to mass extin
 ctions.  However our records of how – and why – CO2 changed through Ea
 rth’s history are still relatively uncertain and incomplete.  In this se
 minar I present recent progress in CO2 reconstruction using boron isotopes
 .  The appeal of this method lies in its grounding in simple acid-base equ
 ilibria\, but there are a range of interesting challenges in its applicati
 on to the geological record.  Here I will outline our current understandin
 g of the boron isotope proxy and show examples of its application to the i
 ce ages\, Cenozoic cooling\, climate sensitivity\, and changes in ocean ch
 emistry associated with mass extinctions. 
LOCATION:Department of Earth Sciences\, Tilley Lecture Theatre
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