This $197,103 Project Grant award from the National Science Foundation's Geosciences Program (CFDA 47.050) supports collaborative research by scientists from the U.S. and U.K. to better understand the linkages between the oceanic cycles of iron and carbon. The project will integrate field data from the Bermuda Atlantic Time-series Study and the Eastern North Atlantic with targeted experimental studies and ocean biogeochemical modeling. Specifically, the research will examine the "colloidal shunt" mechanism, whereby dissolved iron forms aggregates with organic carbon to create particulate matter that sinks out of the upper water column. The findings aim to elucidate how this process may respond to climate-driven changes in ocean oxygenation and provide a conduit for the vertical export of both particulate iron and organic carbon. No sub-awards are planned under this grant, which has an award date of April 1, 2025 and an ultimate completion date of March 31, 2028.
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