Granger, R., S.M. Smart, A.D. Foreman, A. Auderset, E.C. Campbell, T.A. Marshall, G.H. Haug, D.M. Sigman, A. Martínez-García, and S.E. Fawcett. 2024. “Tracking Agulhas Leakage in the South Atlantic Using Modern Planktic Foraminifera Nitrogen Isotopes”. Geochemistry, Geophysics, Geosystems 25. John Wiley and Sons Inc. doi:10.1029/2023GC011190.

Marshall, T.A., L.M. Beal, D.M. Sigman, and S.E. Fawcett. 2023. “Instabilities Across the Agulhas Current Enhance Upward Nitrate Supply in the Southwest Subtropical Indian Ocean”. AGU Advances 4. John Wiley and Sons Inc. doi:10.1029/2023AV000973.

Marshall, T.A., D.M. Sigman, L.M. Beal, A.D. Foreman, A. Martínez-García, S. Blain, E.C. Campbell, et al. (2023) 2023. “The Agulhas Current Transports Signals of Local and Remote Indian Ocean Nitrogen Cycling”. Journal of Geophysical Research: Oceans 37 (2). doi:10.1029/2022JC019413.

Fripiat, F., D.M. Sigman, A. Martínez-García, D. Marconi, X.E. Ai, A. Auderset, S.E. Fawcett, S. Moretti, A.S. Studer, and G.H. Haug. (2023) 2023. “The Impact of Incomplete Nutrient Consumption in the Southern Ocean on Global Mean Ocean Nitrate δ15N”. Global Biogeochemical Cycles. doi:10.1029/2022GB007442.

Marshall, T.A., J. Granger, K.L. Casciotti, K. Dähnke, K.-C. Emeis, D. Marconi, M.R. McIlvin, et al. 2022. “The Angola Gyre Is a Hotspot of Dinitrogen Fixation in the South Atlantic Ocean”. Communications Earth and Environment 3. doi:10.1038/s43247-022-00474-x.

Fawcett, S.E., M.W. Lomas, J.R. Casey, B.B. Ward, and D.M. Sigman. 2011. “Assimilation of Upwelled Nitrate by Small Eukaryotes in the Sargasso Sea”. Nature Geoscience 4: 717-22. doi:10.1038/ngeo1265.

Smart, S.M., S.E. Fawcett, S.J. Thomalla, M.A. Weigand, C.J.C. Reason, and D.M. Sigman. 2015. “Isotopic Evidence for Nitrification in the Antarctic Winter Mixed Layer”. Global Biogeochemical Cycles 29. Blackwell Publishing Ltd: 427-45. doi:10.1002/2014GB005013.

Treibergs, L.A., S.E. Fawcett, M.W. Lomas, and D.M. Sigman. 2014. “Nitrogen Isotopic Response of Prokaryotic and Eukaryotic Phytoplankton to Nitrate Availability in Sargasso Sea Surface Waters”. Limnology and Oceanography 59. American Society of Limnology and Oceanography Inc.: 972-85. doi:10.4319/lo.2014.59.3.0972.

Fripiat, F., D.M. Sigman, S.E. Fawcett, P.A. Rafter, M.A. Weigand, and J.-L. Tison. 2014. “New Insights into Sea Ice Nitrogen Biogeochemical Dynamics from the Nitrogen Isotopes”. Global Biogeochemical Cycles 28. American Geophysical Union: 115-30. doi:10.1002/2013GB004729.

Fawcett, S.E., M.W. Lomas, B.B. Ward, and D.M. Sigman. 2014. “The Counterintuitive Effect of Summer-to-Fall Mixed Layer Deepening on Eukaryotic New Production in the Sargasso Sea”. Global Biogeochemical Cycles 28. American Geophysical Union: 86-102. doi:10.1002/2013GB004579.

Altieri, K.E., S.E. Fawcett, A.J. Peters, D.M. Sigman, and M.G. Hastings. 2016. “Marine Biogenic Source of Atmospheric Organic Nitrogen in the Subtropical North Atlantic”. Proceedings of the National Academy of Sciences of the United States of America 113. National Academy of Sciences: 925-30. doi:10.1073/pnas.1516847113.

Fawcett, S.E., B.B. Ward, M.W. Lomas, and D.M. Sigman. 2015. “Vertical Decoupling of Nitrate Assimilation and Nitrification in the Sargasso Sea”. Deep-Sea Research Part I: Oceanographic Research Papers 103. Elsevier Ltd: 64-72. doi:10.1016/j.dsr.2015.05.004.

Fripiat, F., A. Martínez-García, D. Marconi, S.E. Fawcett, S.H. Kopf, V.H. Luu, P.A. Rafter, R. Zhang, D.M. Sigman, and G.H. Haug. 2021. “Nitrogen Isotopic Constraints on Nutrient Transport to the Upper Ocean”. Nature Geoscience 14. Nature Research: 855-61. doi:10.1038/s41561-021-00836-8.

Smart, S.M., S.E. Fawcett, H.A. Ren, R. Schiebel, E.M. Tompkins, A. Martínez-García, L. Stirnimann, A. Roychoudhury, G.H. Haug, and D.M. Sigman. 2020. “The Nitrogen Isotopic Composition of Tissue and Shell-Bound Organic Matter of Planktic Foraminifera in Southern Ocean Surface Waters”. Geochemistry, Geophysics, Geosystems 21. Blackwell Publishing Ltd. doi:10.1029/2019GC008440.

Fripiat, F., A. Martínez-García, S.E. Fawcett, P.C. Kemeny, A.S. Studer, S.M. Smart, F. Rubach, S. Oleynik, D.M. Sigman, and G.H. Haug. 2019. “The Isotope Effect of Nitrate Assimilation in the Antarctic Zone: Improved Estimates and Paleoceanographic Implications”. Geochimica Et Cosmochimica Acta 247. Elsevier Ltd: 261-79. doi:10.1016/j.gca.2018.12.003.

Kemeny, P.C., E.R. Kast, M.P. Hain, S.E. Fawcett, F. Fripiat, A.S. Studer, A. Martínez-García, G.H. Haug, and D.M. Sigman. 2018. “A Seasonal Model of Nitrogen Isotopes in the Ice Age Antarctic Zone: Support for Weakening of the Southern Ocean Upper Overturning Cell”. Paleoceanography and Paleoclimatology 33. John Wiley and Sons Inc.: 1453-71. doi:10.1029/2018PA003478.

Fawcett, S.E., K.S. Johnson, S.C. Riser, N. Van Oostende, and D.M. Sigman. 2018. “Low-Nutrient Organic Matter in the Sargasso Sea Thermocline: A Hypothesis for Its Role, Identity, and Carbon Cycle Implications”. Marine Chemistry 207. Elsevier B.V.: 108-23. doi:10.1016/j.marchem.2018.10.008.

Smart, S.M., H.A. Ren, S.E. Fawcett, R. Schiebel, M. Conte, P.A. Rafter, K.K. Ellis, et al. 2018. “Ground-Truthing the Planktic Foraminifer-Bound Nitrogen Isotope Paleo-Proxy in the Sargasso Sea”. Geochimica Et Cosmochimica Acta 235. Elsevier Ltd: 463-82. doi:10.1016/j.gca.2018.05.023.

Peng, X., S.E. Fawcett, N. Van Oostende, M.J. Wolf, D. Marconi, D.M. Sigman, and B.B. Ward. 2018. “Nitrogen Uptake and Nitrification in the Subarctic North Atlantic Ocean”. Limnology and Oceanography 63. Wiley Blackwell: 1462-87. doi:10.1002/lno.10784.

Marconi, D., D.M. Sigman, K.L. Casciotti, E.C. Campbell, A. Weigand, S.E. Fawcett, A.N. Knapp, P.A. Rafter, B.B. Ward, and G.H. Haug. 2017. “Tropical Dominance of N2 Fixation in the North Atlantic Ocean”. Global Biogeochemical Cycles 31. Blackwell Publishing Ltd: 1608-23. doi:10.1002/2016GB005613.

Van Oostende, N., S.E. Fawcett, D. Marconi, J.A. Lueders-Dumont, A.J.M. Sabadel, E.M.S. Woodward, B.F. Jönsson, D.M. Sigman, and B.B. Ward. 2017. “Variation of Summer phytoplankton community Composition and Its Relationship to Nitrate and Regenerated Nitrogen Assimilation across the North Atlantic Ocean”. Deep-Sea Research Part I: Oceanographic Research Papers 121. Elsevier Ltd: 79-94. doi:10.1016/j.dsr.2016.12.012.

Kemeny, P.C., M.A. Weigand, R. Zhang, B.R. Carter, K.L. Karsh, S.E. Fawcett, and D.M. Sigman. 2016. “Enzyme-Level Interconversion of Nitrate and Nitrite in the Fall Mixed Layer of the Antarctic Ocean”. Global Biogeochemical Cycles 30. Blackwell Publishing Ltd: 1069-85. doi:10.1002/2015GB005350.