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SUMMARY:Surface roughness: a key to understanding Arctic sea ice from micr
 o to macro scales - Jack Landy\, University of Bristol
DTSTART:20171129T110000Z
DTEND:20171129T120000Z
UID:TALK82791@talks.cam.ac.uk
CONTACT:Dr Peter Davis
DESCRIPTION:Sea ice in the Arctic has been declining at an alarming rate o
 ver the past 15-20 years. To understand the mechanisms driving this declin
 e we must first understand how the properties of sea ice vary across the f
 ull range of scales\, from the microscopic to the macroscopic\, which make
  up the Arctic’s ice cover. In this seminar I will demonstrate why surfa
 ce roughness is key for understanding various processes affecting sea ice 
 across these different scales. At the micro-scale (mm-cm)\, roughness cont
 rols the scattering of microwave radiation as it interacts with the ice co
 ver. At the meso-scale (m)\, variations in the roughness of the ice topogr
 aphy drive differential rates of sea ice melt between locations and years.
  Finally\, at the macro-scale (km)\, surface roughness can be used to pred
 ict the pattern of melt across the Arctic basin many months in advance. My
  research has principally involved using geodetic techniques\, including L
 ight Detection and Ranging (LiDAR) and satellite altimetry\, to study sea 
 ice roughness at each of these scales. Here I will present the interesting
  findings from this research and introduce a selection of ongoing projects
  between the University of Bristol and Canadian research institutions targ
 eting sea ice surface roughness\, including an Environment Canada/NOAA led
  validation campaign for Operation IceBridge and Cryosat-2.
LOCATION:British Antarctic Survey\, Innovation Centre\, Seminar Room 1
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