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SUMMARY:Glaciers\, icebergs and silicon: Preliminary findings from ICY-LAB
  research expeditions to SW Greenland - Kate Hendry\, University of Bristo
 l
DTSTART:20171113T110000Z
DTEND:20171113T120000Z
UID:TALK82811@talks.cam.ac.uk
CONTACT:Dr Peter Davis
DESCRIPTION:The supply and distribution of dissolved silicon (Si) in the o
 ceans is a key factor in the growth of marine diatoms\, which precipitate 
 biogenic silica (or opal\, hydrated SiO2). Rivers and groundwater have lon
 g been considered the major inputs of dissolved Si\, which is released dur
 ing the weathering of silicate rocks. Glaciers are known sources of both d
 issolved and particulate phases of Si\, but the impact on oceanic systems 
 needs further quantification to produce a more robust global budget. The a
 im of the ICY-LAB project is to investigate the role of high-latitude proc
 esses on the Si marine cycle\, using isotope geochemistry to constrain the
  impact of different key processes. I will be presenting some new findings
  from terrestrial field campaigns\, and some preliminary findings from oce
 anic expedition DY081 (RRS Discovery\, July-August 2017) to the Southwest 
 continental shelf region of Greenland. Our findings improve the understand
 ing of the Si cycling between terrestrial sediments\, shelf processes and 
 seawater in glaciated regions\, which represents an important but understu
 died component of internal cycling as well as a key input into the oceanic
  Si budget.
LOCATION:British Antarctic Survey\, Innovation Centre\, Seminar Room 1
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