BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Melting and mixing at the submarine termini of tidewater glaciers 
 - Rebecca Jackson\, Rutgers University
DTSTART:20201007T130000Z
DTEND:20201007T140000Z
UID:TALK150721@talks.cam.ac.uk
CONTACT:Dr Irena Vankova
DESCRIPTION:Around the globe\, glaciers and ice sheets are shrinking and c
 ontributing to sea level rise. Ocean warming has been implicated as a driv
 er of glacier retreat\, with submarine melting as the presumed link. Howev
 er\, at the termini of tidewater glaciers\, we lack observations of submar
 ine melting or the oceanic processes that control melt. Instead\, many stu
 dies rely on untested theory and parameterizations to estimate submarine m
 elt rates. These frameworks often hinge on buoyant plumes\, whose small-sc
 ale dynamics can modulate both the ocean’s impact on the glacier via sub
 marine melting and the glacier’s impact on the ocean via buoyancy forcin
 g. In this talk\, I will present data collected near the terminus of LeCon
 te Glacier\, Alaska to probe the standard theory for plume-driven melt. In
  the first half\, I will present surveys from autonomous kayaks that revea
 l ubiquitous meltwater intrusions along the terminus and suggest a mechani
 sm to explain melt rates that are significantly higher than standard theor
 y predicts. In the second half\, the bulk fluxes of submarine melt and sub
 glacial discharge are evaluated across a wide range of conditions in six f
 ield campaigns to test the theoretical relationship between these two sour
 ces of freshwater. Modifications to the standard melt parameterizations ar
 e explored\, in an effort to work towards an updated representation of mel
 t in ocean-glacier models.
LOCATION:British Antarctic Survey\, Zoom
END:VEVENT
END:VCALENDAR