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SUMMARY:Exploring the key drivers of Quaternary hydroclimate change in Afr
 ica with models and palaeodata - Joy Singarayer - University of Reading
DTSTART:20180517T163000Z
DTEND:20180517T173000Z
UID:TALK100567@talks.cam.ac.uk
CONTACT:Heather L. Ford
DESCRIPTION:Historical and Quaternary palaeoenvironmental archives from no
 rthern and southern Africa indicate phases of extreme wet/dry conditions o
 f much greater amplitude than the variability seen in recent years. These 
 phases were accompanied by massive changes to lakes\, wetlands\, and veget
 ation. Such variability of hydroclimate has also been strongly linked to a
 ncient human adaptation and migration. However\, the spatial pattern of pr
 ecipitation variability and its dominant driving forces are still debated.
  Prevailing hypotheses variously infer (1) insolation-controlled asymmetry
  of wet phases between hemispheres\, (2) symmetric contraction and expansi
 on of the tropical rainbelt\, and (3) independent control on moisture avai
 lable in Southern Africa via sea surface temperatures in the Indian Ocean.
  Here\, I will explore these hypotheses using results from climate-model s
 imulations covering the last glacial cycle (120 kyr) to investigate the lo
 ng-term behaviour of the African rainbelt\, and test these simulations aga
 inst existing empirical palaeohydrological records. I will also discuss th
 e potential impact of feedbacks between lakes/wetlands and climate for reg
 ional climate change.\n
LOCATION:Bawden Room\, West Court\, Jesus College
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