Glaciers, icebergs and silicon: Preliminary findings from ICY-LAB research expeditions to SW Greenland

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• Kate Hendry, University of Bristol
• Monday 13 November 2017, 11:00-12:00
• British Antarctic Survey, Innovation Centre, Seminar Room 1.

If you have a question about this talk, please contact Dr Peter Davis.

If external to BAS, please email the organiser in advance to gain access to the building

The supply and distribution of dissolved silicon (Si) in the oceans is a key factor in the growth of marine diatoms, which precipitate biogenic silica (or opal, hydrated SiO2). Rivers and groundwater have long been considered the major inputs of dissolved Si, which is released during the weathering of silicate rocks. Glaciers are known sources of both dissolved and particulate phases of Si, but the impact on oceanic systems needs further quantification to produce a more robust global budget. The aim of the ICY -LAB project is to investigate the role of high-latitude processes 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 oceanic expedition DY081 (RRS Discovery, July-August 2017) to the Southwest continental shelf region of Greenland. Our findings improve the understanding of the Si cycling between terrestrial sediments, shelf processes and seawater in glaciated regions, which represents an important but understudied component of internal cycling as well as a key input into the oceanic Si budget.

This talk is part of the British Antarctic Survey - Polar Oceans seminar series series.

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