[Eoas-seminar] Reminder TODAY - Fwd: EOAS Colloquium 1/13

[eoas-seminar at lists.fsu.edu]

Dear EOAS,

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

3 pm in EOA 1050

Host: Angie Knapp - please email to meet with Dr. Conway

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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