This National Science Foundation (NSF) Project Grant award, funded under the Geosciences program (CFDA 47.050), will support a two-year time-series study of size-fractionated aerosol samples collected near Bermuda in the North Atlantic Ocean. The $571,384 award to the University of Delaware aims to: 1) analyze temporal variations in the size distribution of aerosol trace elements like iron, 2) quantify lower and upper estimates of potentially bioavailable iron, 3) investigate the chemical controls on aerosol iron solubility, and 4) model deposition velocities to constrain the supply rates of total and soluble trace elements to North Atlantic surface waters. The results will improve understanding of atmospheric trace element delivery and solubility, leading to better representation in global biogeochemical models. No subawards are planned under this grant.
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