| NSF Org: |
OCE Division Of Ocean Sciences |
| Recipient: |
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| Initial Amendment Date: | January 2, 2014 |
| Latest Amendment Date: | January 2, 2014 |
| Award Number: | 1357224 |
| Award Instrument: | Standard Grant |
| Program Manager: |
Henrietta Edmonds
hedmonds@nsf.gov (703)292-7427 OCE Division Of Ocean Sciences GEO Directorate for Geosciences |
| Start Date: | March 1, 2014 |
| End Date: | February 28, 2017 (Estimated) |
| Total Intended Award Amount: | $386,335.00 |
| Total Awarded Amount to Date: | $386,335.00 |
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| Recipient Sponsored Research Office: |
77 MASSACHUSETTS AVE CAMBRIDGE MA US 02139-4301 (617)253-1000 |
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| Primary Place of Performance: |
77 Mass. Ave., Bldg E25-619 Cambridge MA US 02139-4307 |
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Performance Congressional District: |
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| Unique Entity Identifier (UEI): |
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| NSF Program(s): | Chemical Oceanography |
| Primary Program Source: |
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| Award Agency Code: | 4900 |
| Fund Agency Code: | 4900 |
| Assistance Listing Number(s): | 47.050 |
ABSTRACT
Lead is a trace metal that has historically been emitted into the atmosphere through human activities such as coal burning and the use of leaded gasoline followed by deposition into the ocean. Once introduced into the marine environment, lead is dispersed via currents and removed by biota and other sinking particles. This century-scale growth of lead emissions followed by a decline upon the phase-out of leaded gasoline is one of the great global geochemical experiments. In this study, researchers at the Massachusetts Institute of Technology will analyze archived seawater samples to improve our knowledge on the spatial and temporal variability of lead concentrations and lead isotope ratios. This data will yield new insights into the sources and transport of lead and other metals, document the time-evolving human footprint on the ocean, and assist with validating models.
Broader Impacts: The study will improve our understanding of factors influencing lead chemistry in the ocean and provide educational opportunities for graduate and post-doctoral students in the biogeochemistry of this element.
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