sargasso sea

 DSCF9503 FiltrationPN DSCF9277 P1010497

My work in the Sargasso Sea can be broadly divided into:

1. Flow cytometry-N isotope studies

2. Geochemical studies

Please click on the links above for more information

Relevant publications:

Fawcett, S.E., Johnson, K.S., Riser, S.C., Van Oostende, N., Sigman, D.M. Nutrient-poor, slowly sinking organic matter in the Sargasso Sea — A hypothesis and supporting evidence. In review, Limnology and Oceanography.

Altieri, K.E., Fawcett, S.E., Peters, A.J., Sigman, D.M., Hastings, M.G. Marine biogenic source of atmospheric organic nitrogen in the subtropical North Atlantic. PNAS 113: 925-930 (2016). Altieri PNAS 2016

Fawcett, S.E., Ward, B.B., Lomas, M.W., Sigman, D.M. Vertical decoupling of nitrate assimilation and nitrification in the Sargasso Sea. Deep-Sea Research I 103: 64-72 (2015). Fawcett DSR 2015

Treibergs, L.A., Fawcett, S.E., Lomas, M.W., Sigman, D.M. Nitrogen isotopic response of prokaryotic and eukaryotic phytoplankton to nitrate availability in Sargasso Sea surface waters. Limnology and Oceanography 59: 972-985 (2014). Treibergs L&O 2014

Fawcett, S.E., Lomas, M.W., Ward, B.B., Sigman, D.M. The counterintuitive effect of summer-to-fall mixed layer deepening on eukaryotic new production in the Sargasso Sea. Global Biogeochemical Cycles 28: 86-102 (2014). Fawcett GBC 2014

Newell, S.E., Fawcett, S.E., Ward, B.B. Depth distribution of ammonia oxidation rates and ammonia-oxidizer community composition in the Sargasso Sea. Limnology and Oceanography 58: 1491-1500 (2013). Newell L&O 2013

Fawcett, S.E., Lomas, M.W., Casey, J.R., Ward, B.B., Sigman, D.M. Assimilation of upwelled nitrate by small eukaryotes in the Sargasso Sea. Nature Geoscience 4: 717-722 (2011). Fawcett NatGeo 2011 (See also: news article)