Extracted from the NSF award abstract:
Iron is an essential micronutrient for marine phytoplankton, which plays a key role in the global carbon cycle and marine ecosystems, and there is a need to better understand the sources and sinks of this essential micronutrient in the oceans. Iron isotopes are a recently developed tracer of iron biogeochemical cycling, and new iron isotope results indicate that iron-binding ligands may play a critical role in the isotopic fractionation of dissolved iron. At present, however, the quantitative importance of iron dissolution or biological iron uptake in the isotopic fractionation of dissolved iron in the oceans is not well-known. In this study, researchers from the University of South Carolina and the Bermuda Institute of Ocean Sciences will collect and analyze samples from the Bermuda Atlantic Time-series Station (BATS) in order to; 1) measure the rate and isotope fractionation of iron dissolution from natural aerosols and oxic sediments in the presence of natural iron-binding ligands, and; 2) examine how phytoplankton fractionate iron isotopes during biological uptake. Results from this study will advance the development of iron isotopes as a tool for tracing iron biogeochemical cycling in the oceans.
Dataset | Latest Version Date | Current State |
---|---|---|
Experimental determination of Fe isotope effect for reduction from Fe(III) to Fe(II) | 2019-05-09 | Data not available |
Particulate iron (pFe) isotope concentrations from the GEOTRACES EPZT cruise (R/V Thomas G. Thompson TN303) in the Eastern Tropical Pacific from October to December 2013 | 2016-12-09 | Final no updates expected |
Principal Investigator: Kristen Nicolle Buck
University of South Florida (USF)
Principal Investigator: Seth G. John
University of Southern California (USC)
Contact: Kristen Nicolle Buck
University of South Florida (USF)
Contact: Seth G. John
University of Southern California (USC)