[Eoas-seminar] EOAS Colloquium Fri Jan 13 at 3pm

[eoas-seminar at lists.fsu.edu]

Dear EOAS,

The first EOAS Colloquium speaker of the Spring semester 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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