publications

Fassbender, A.J., Palevsky, H.I., Martz, T.R., Ingalls, A.E., Gledhill, M., Fawcett, S.E., Brandes, J., Aluwihare, L. Perspectives on Chemical Oceanography in a changing environment: Participants of the COME ABOARD Meeting examine the field in the context of 40 years of DISCO. In review, Marine Chemistry.

Fawcett, S.E., Johnson, K.S., Riser, S.C., Van Oostende, N., Sigman, D.M. Remineralization of low-nutrient organic matter in the Sargasso Sea thermocline and implications for the upper ocean carbon budget. In review, Global Biogeochemical Cycles.

Marconi, D., Sigman, D.M., Casciotti, K.L., Campbell, E.C., Weigand, M.A., Fawcett, S.E., Knapp, A.N., Ward, B.B., Haug, G.H. Tropical dominance of N2 fixation in the North Atlantic Ocean. Accepted, Global Biogeochemical Cycles.

Ansorge, I.J., Skelton, P., Bekker, A., Butterworth, D., Cilliers, P., Cooper, J., Cowan, D., Dorrington, R., Fawcett, S.E., et al. Exploring South Africa’s southern frontier: A 20-year vision for Polar Research through the South African National Antarctic Programme. South African Journal of Science, 113 (5/6) doi.org/10.17159/sajs.2017/a0205 (2017). Ansorge SAJS 2017

Van Oostende, N., Fawcett, S.E., Marconi, D., Lueders-Dumont, J., Sabadel, A.J.M., Woodward, E.M.S., Jönsson, B.F., Sigman, D.M., Ward, B.B. Variation of summer phytoplankton community composition and its relationship to nitrate and ammonium assimilation across the North Atlantic Ocean. Deep Sea Research I, 121: 79-94 (2017). Van Oostende DSRI 2017

Ansorge, I.J., Brundrit, G., Brundrit, J. Dorrington, R., Fawcett, S., Gammon, D., Henry, T., Holstein, B., d’Hotman, J., Meiklejohn, I., Pinto, I., du Plessis, M., Roman, R., Saunders, C., Shabangu, F., de Vos, M., Walker, D., Louw., G. “SEAmester” – South Africa’s first class afloat. South African Journal of Science 112 (9/10) doi.org/10.17159/sajs.2016/a0171 (2016). Ansorge SAJS 2016. (See also: Editor’s choice in SAJS).

Halo, I., Dorrington, R., Bornman, T., De Villiers, S., Fawcett, S. South Africa in the Antarctic Circumnavigation Expedition (ACE): A multi-institutional and interdisciplinary scientific project. South African Journal of Science 112 (9/10) doi. org/10.17159/sajs.2016/a0173 (2016). Halo SAJS 2016. (See also: Editor’s choice in SAJS).

Knapp, A.N., Fawcett, S.E., Martínez-Garcia, A., Leblond, N., Moutin, T., Bonnet, S. Nitrogen isotopic evidence for a shift from nitrate- to diazotroph-fueled export production in VAHINE mesocosm experiments. Biogeosciences  13: 4645-4657 (2016). Knapp BGD 2015.

Kemeny, P.K., Weigand, M.A., Zhang, R., Carter, B.R., Karsh, K.L., Fawcett, S.E., Sigman, D.M. Enzyme-level interconversion of nitrate and nitrite in the fall mixed layer of the Antarctic Ocean. Global Biogeochemical Cycles 30: 1069-1085 (2016). Kemeny GBC 2016. (See also: Research spotlight in EOS).

Bonnet, S., Berthelot, H., Turk K., Cornet-Barthaux, V., Fawcett, S., Berman-Frank, I., Barani, A., Dekeazemacker, J., Benavides, M., Charrière, B., Capone, D. Diazotroph derived nitrogen supports diatom growth in the South West Pacific: A quantitative study using nanoSIMS. Limnology and Oceanography 61: 1549-1562 (2016). Bonnet L&O 2016

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. (See also: news article).

Bonnet, S., Berthelot, H., Turk-Kubo, K., Fawcett, S.E., Rahav, E., l’Helguen, S., Berman-Frank, I. Dynamics of N2 fixation and fate of diazotroph-derived nitrogen in a low nutrient low chlorophyll ecosystem: results from the VAHINE mesocosm experiment (New Caledonia). Biogeosciences 13: 2653-2673 (2016). Bonnet BGD 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

Smart, S.M., Fawcett, S.E., Thomalla, S.J., Weigand, M.A., Reason, C.J.C., Sigman, D.M. Isotopic evidence for nitrification in the Antarctic winter mixed layer. Global Biogeochemical Cycles 29: 427-445 (2015). Smart GBC 2015

Van Oostende, N., Dunne, J.P., Fawcett, S.E., Ward, B.B. Phytoplankton succession and acclimation explains nitrate uptake following an upwelling event. Journal of Marine Systems 148: 14-25 (2015). Van Oostende JMarSys 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

Fripiat, F., Sigman, D.M., Fawcett, S.E., Rafter, P., Weigand, M., Tison, J.-L. New insights on sea ice nitrogen biogeochemical dynamics and paleoceanography implications from nitrogen isotopes. Global Biogeochemical Cycles 28: 115-130 (2014). Fripiat 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)

Fawcett, S.E., Ward, B.B. Phytoplankton succession and nitrogen utilization during the development of an upwelling bloom. Marine Ecology Progress Series 428: 13-31 (2011). Fawcett Ward MEPS 2011