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SUMMARY:Dynamics of fire and ice: wildfire weather and ice-sediment intera
 ctions - Kasturi Shah\, DAMTP\, University of Cambridge
DTSTART:20251117T130000Z
DTEND:20251117T140000Z
UID:TALK236773@talks.cam.ac.uk
CONTACT:Bethan Wynne-Cattanach
DESCRIPTION:This talk focuses on examples of coupled particle-fluid intera
 ctions on our planet that can produce dramatic emergent behaviour of socie
 tal and climate importance. The most extreme wildfires are increasing in i
 ntensity and frequency and create their own weather. Here\, progress towar
 ds understanding the self-organisation of wildfire smoke from the surface 
 to the stratosphere will be presented. Topics include aerosol-filled vorti
 ces\, self-reinforcing instabilities associated with wildfire smoke\, and 
 physics of wildfire-driven plumes. The last part of the talk is on fast-fl
 owing ice on Earth that typically occurs over beds with thin layers of def
 ormable sediment\, such as ice streams and surging glaciers. Mechanisms by
  which ice can 'surge' forward quasi-episodically with order-of-magnitude 
 accelerations in ice velocity are debated. Using a physically consistent m
 odel for the ice-sediment interface\, a stability theory for surge behavio
 ur will be presented. The talk will conclude with an outlook on the dynami
 cs of wildfire and ice. 
LOCATION:MR3\, CMS
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