[Eoas-seminar] EOAS Colloquium 1/13

[eoas-seminar at lists.fsu.edu]

Dear EOAS,



The first EOAS Colloquium speaker will be next Friday, 13 January 2023 at

3 pm in EOA 1050



Host: Angie Knapp - please email to meet with Dr. Conway on Thurs Jan 12 or Fri Jan 13



Dr. Tim Conway, USF

"New insights for oceanic iron biogeochemistry from iron isotopes: 10+ years of the GEOTRACES Program"



Abstract:

The micronutrient element iron plays a major role in setting the patterns and distribution of primary production and carbon cycling across the global oceans. As such, understanding the sources, sinks, and internal cycling processes that drive the oceanic distribution of iron is key to unlocking the role of iron in the global ocean and climate system, whether today, in the geologic past, or in the 'anthropogenic' future. In the last decade, stimulated largely by the International GEOTRACES Program, dissolved iron isotope analyses of seawater (and source

materials) have emerged as a transformative tool for diagnosing iron sources to the ocean, and tracking iron through the ocean. In this talk, I will present an overview of the explosion of new oceanic dissolved iron concentration and isotope data, as well as several case studies that show how iron isotopes have revolutionized our understanding of boundary sources such as atmospheric dust, underwater volcanoes and vents, and marine sediments, and, remarkably, how they also show iron can be carried thousands of kilometers through the ocean.

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