BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Ising model for melt ponds on Arctic sea ice - Yiping Ma (Northumb
 ria University)
DTSTART:20170914T133000Z
DTEND:20170914T140000Z
UID:TALK79211@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:<span>Perhaps the most iconic feature of melting Arctic sea ic
 e is the formation of distinctive\, complex ponds on its surface during la
 te spring. The evolution of melt ponds and their geometrical characteristi
 cs determines the albedo of sea ice\, a key parameter in climate modeling.
  However\, a theoretical understanding of this evolution\, and predictions
  of geometrical features\, have remained elusive. To address this fundamen
 tal problem in polar climate science\, here we introduce a two dimensional
  random field Ising model for melt ponds. The ponds are identified as meta
 stable states of the system\, where the binary spin variable corresponds t
 o the presence of melt water or ice on the sea ice surface. With only a mi
 nimal set of physical parameters\, the model predictions agree very closel
 y with observed power law scaling of the pond size distribution and critic
 al length scale where melt ponds undergo a transition in fractal geometry.
 <br><br>This is joint work with&nbsp\;</span>Ivan Sudakov\, Courtenay Stro
 ng\, and&nbsp\;Kenneth M. Golden.
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR