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SUMMARY:Meltwater\, meteorites\, and volcanoes: the elusive cause of the Y
 ounger Dryas Event - James Baldini\, Durham University
DTSTART:20251126T173000Z
DTEND:20251126T190000Z
UID:TALK237574@talks.cam.ac.uk
CONTACT:Emily Kraus
DESCRIPTION:Near the end of the last deglaciation\, as increasing Northern
  Hemisphere insolation was driving gradual warming\, the northern hemisphe
 re experienced a pronounced 1\,300-year cold reversal known as the Younger
  Dryas Event. This period corresponds approximately with Greenland Stadial
 -1\, the final stadial before the onset of the Holocene. Despite over a ce
 ntury of research\, the origin of the Younger Dryas Event remains unresolv
 ed. The leading hypothesis\, proposed in the 1980s\, suggests that a meltw
 ater pulse disrupted North Atlantic oceanic circulation\, triggering wides
 pread cooling. In 2007\, an alternative theory emerged\, proposing that a 
 bolide either impacted or exploded above the Laurentide Ice Sheet\, initia
 ting not only the Younger Dryas Event but also numerous other global chang
 es\, including the extinction of North American Pleistocene megafauna and 
 the rise of agriculture in the Middle East. More recently\, volcanic activ
 ity has gained attention as a plausible trigger. This talk will explore th
 ese competing hypotheses\, ranging from the conventional to the extraordin
 ary\, by evaluating the supporting evidence\, strengths\, and limitations 
 of each\, including insights from recent studies.
LOCATION:Latimer Room\, Clare College
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