APS Colloquium, “Ocean Science and Synchrotrons, a Multi-Modal Adventure “, Brandy Toner, University of Minnesota-Twin Cities, Wednesday, Dec 4, 3pm, Bldg 402, Auditorium
Abstract : Hydrothermal venting occurs in every ocean basin on the planet. The physical and chemical gradients created by the mixing of ocean water with vent ﬂuids creates dynamic changes in the chemistry of many biogeochemically important elements. Whether vents are net sources or sinks of elements in ocean budgets depends in large part on particle formation, reactivity, and transport properties. Hydrothermal vent particles have been shown to host microbial communities, and exhibit complex size distributions, aggregation behavior, and composition. In this talk, I will describe how a suite of complementary synchrotron radiation instruments in the soft-, tender-, and hard x-ray regimes with nano- and micro-meter focusing capabilities are changing our understanding of deep ocean biogeochemistry.