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SUMMARY:Mapping Slush and Ponded Meltwater across Antarctic Ice Shelves us
 ing Supervised Classification - Rebecca Dell\, University of Cambridge
DTSTART:20220111T140000Z
DTEND:20220111T150000Z
UID:TALK167450@talks.cam.ac.uk
CONTACT:Dr Alex Bradley
DESCRIPTION:75% of the Antarctic coastline is bordered by Antarctic ice sh
 elves\, which often buttress inland grounded ice\, therefore buffering con
 tributions to global mean sea level rise. Ice shelf mass balance and stabi
 lity is partially affected by surface melting\, which can drive the format
 ion of extensive surface meltwater systems\, and potentially cause ice she
 lf collapse by hydrofracture. Surface meltwater systems are comprised of s
 lush (saturated firn) and ponded meltwater. It is important that the onset
 \, extent\, duration\, and composition of the surface meltwater systems ac
 ross all Antarctic ice shelves is monitored closely\, so we can better und
 erstand and predict each ice shelf’s potential vulnerability to hydrofra
 cture-driven collapse.\n\nWhilst mapping relatively deep\, ponded meltwate
 r can be achieved using simple threshold-based methods\, few studies have 
 previously mapped slush\, owing to its spectral similarities to other surf
 ace facies such as blue ice\, snow\, and ponded meltwater. Here\, we prese
 nt and apply a supervised classifier capable of automatically mapping and 
 distinguishing between slush and ponded meltwater on all Antarctic ice she
 lves using the Landsat 8 record. Initial results will be presented during 
 this talk.
LOCATION:Online (contact organiser for Zoom link)
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