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Tuesday 11 October 2011, 16:30-17:30
Extreme change in sulfide concentrations near the Bosporus Inlet (Black Sea) during the Little Ice Age tracked using molybdenum isotopes
- đ¤ Speaker: Gail Arnold, MPI Bremen
- đ Date & Time: Tuesday 11 October 2011, 16:30 - 17:30
- đ Venue: Harker 1 seminar room, Department of Earth Sciences
Abstract
Molybdenum isotope data indicate that in the region of the Bosporus inlet the chemocline rose more than 65 m, reaching concentrations over 100 micromolar sulfide in the bottom water approximately 300 ybp. This historical shoaling of the chemocline and extreme change in bottom water sulfide concentration exceeds the modern changes that have been observed directly and attributed to anthropogenic influences on the Black Sea chemistry/hydrology. Our preliminary findings demonstrate the potential of the Mo isotope proxy to reconstruct historical, basin-wide changes in water-column redox structure and sulfide concentrations in the Black Sea and other marine basins by analogy.
Series This talk is part of the Department of Earth Sciences Seminars (downtown) series.
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