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ILSC Monthly Seminar: February 16, 2012


January: Michael Taylor
February: Marna Yandeau-Nelson
March: Paul Lockman
April: Martin Gruebele


January: David D. Thomas
February: Elizabeth Austin-Minor
March: Juliette Lecomte
April: David Millar
May: Lukas Tamm
September: David Millar
September: Dongping Zhong
October: Jonathan V. Rocheleau
November: Yevgenya Grinblat
December: Michael Graner


January: Clay Carter
February (a): Anne Kenworthy
February (b): Jennifer Liang
March: Joe Johnson
April: Marco Ciufolini
May: Gary Pielak
October: Matthew Andrews
December: Andrew Skildum


November: Rui Wang
October: Marshall Hampton

Using Bomb Radiocarbon as a Biogeochemical Tracer in a Large-Lake Ecosystem

Speaker: Dr. Elizabeth Austin-Minor; Department of Chemistry and Biochemistry, Large Lakes Observatory, University of Minnesota Duluth

Time/Place: Thursday, Feb. 16th at 3:00 pm, 130 SMed

Abstract: Above-ground nuclear testing in the 1950s and 1960s added a distinctly measurable spike of radiocarbon to the earth’s atmospheric carbon dioxide. Since then, the atmospheric radiocarbon label has been equilibrating with carbon pools in plants, animals, soils, rivers, streams, lakes, and oceans. We can look for the bomb spike within these carbon pools to understand exchanges within the earth’s ecosystems. In this talk, I will describe my recent work in Lake Superior tracing the bomb spike of radiocarbon within dissolved and particulate organic matter in surface and deep waters, lake sediments, and plankton biomass.

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