Ai, X.E., L.M. Thöle, A. Auderset, M. Schmitt, S. Moretti, A.S. Studer, E. Michel, et al. 2024. “The Southward Migration of the Antarctic Circumpolar Current Enhanced Oceanic Degassing of Carbon Dioxide During the Last Two Deglaciations”. Communications Earth and Environment 5. Nature Publishing Group. doi:10.1038/s43247-024-01216-x.

Moretti, S., N.N. Duprey, A.D. Foreman, A. Arns, S. Brömme, J. Jung, X.E. Ai, et al. 2024. “Analytical Improvements and Assessment of Long-Term Performance of the oxidation–denitrifier Method”. Rapid Communications in Mass Spectrometry 38. John Wiley and Sons Ltd. doi:10.1002/rcm.9650.

Comans, C.M., S.M. Smart, E.R. Kast, Y. Lu, T. Lüdecke, J.N. Leichliter, D.M. Sigman, T. Ikejiri, and A. Martínez-García. 2024. “Enameloid-Bound δ15N Reveals Large Trophic Separation Among Late Cretaceous Sharks in the Northern Gulf of Mexico”. Geobiology 22. John Wiley and Sons Inc. doi:10.1111/gbi.12585.

Sigman, D.M., and M.P. Hain. 2024. “Ocean Oxygen, Preformed Nutrients, and the Cause of the Lower Carbon Dioxide Concentration in the Atmosphere of the Last Glacial Maximum”. Paleoceanography and Paleoclimatology 39. John Wiley and Sons Inc. doi:10.1029/2023PA004775.

Choisnard, N., N.N. Duprey, T. Wald, M. Thibault, F. Houlbrèque, A.D. Foreman, P. Cuet, et al. 2024. “Tracing the Fate of Seabird-Derived Nitrogen in a Coral Reef Using Nitrate and Coral Skeleton Nitrogen Isotopes”. Limnology and Oceanography. John Wiley and Sons Inc. doi:10.1002/lno.12485.

Marshall, T.A., L. 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.

Straub, M., A. Auderset, L. de Leval, N. Piazzon, D. Maison, M.-C. Vozenin, J. Ollivier, B. Petit, D.M. Sigman, and A. Martínez-García. 2023. “Nitrogen Isotopic Composition As a Gauge of Tumor Cell Anabolism-to-Catabolism Ratio”. Scientific Reports 13. Nature Research. doi:10.1038/s41598-023-45597-z.

Hess, A. V., A. Auderset, Y. Rosenthal, K. G. Miller, X. Zhou, D.M. Sigman, and A. Martínez-García. (2023) 2023. “A Well-Oxygenated Eastern Tropical Pacific During the Warm Miocene”. Nature. doi:10.1038/s41586-023-06104-6.

Leichliter, J.N., T. Lüdecke, A.D. Foreman, N. Bourgon, N.N. Duprey, H. Vonhof, V. Souksavatdy, et al. 2023. “Tooth Enamel Nitrogen Isotope Composition Records Trophic Position: A Tool for Reconstructing Food Webs”. Communications Biology 6. doi:10.1038/s42003-023-04744-y.

Marshall, T. A., D. M. Sigman, L. M. Beal, A. Foreman, A. Martínez-García, S. Blain, E. 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.

Farmer, Jesse, Tamara Pico, Ona Underwood, Rebecca Cleveland Stout, Julie Granger, Thomas M. Cronin, François Fripiat, Alfredo Martínez-García, Gerald Haug, and Daniel Sigman. (2022) 2023. “The Bering Strait Was Flooded 10,000 Years before the Last Glacial Maximum”. PNAS 120 (1). doi:10.1073/pnas.2206742119.

Lüdecke, Tina, Jennifer N. Leichliter, Vera Aldeias, Marion K. Bamford, Dora Biro, David R. Braun, Cristian Capelli, et al. 2022. “Carbon, Nitrogen, and Oxygen Stable Isotopes in Modern Tooth Enamel: A Case Study from Gorongosa National Park, Central Mozambique”. Frontiers in Ecology and Evolution 10. doi:10.3389/fevo.2022.958032.

Wang, X.T., Y. Wang, A. Auderset, D.M. Sigman, H. Ren, A. Martínez-García, G.H. Haug, et al. 2022. “Oceanic Nutrient Rise and the Late Miocene Inception of Pacific Oxygen-Deficient Zones”. Proceedings of the National Academy of Sciences of the United States of America 119. doi:10.1073/pnas.2204986119.

Martínez-García, A., J. Jung, X.E. Ai, D.M. Sigman, A. Auderset, N.N. Duprey, A. Foreman, et al. 2022. “Laboratory Assessment of the Impact of Chemical Oxidation, Mineral Dissolution, and Heating on the Nitrogen Isotopic Composition of Fossil-Bound Organic Matter”. Geochemistry, Geophysics, Geosystems 23. doi:10.1029/2022GC010396.

Marshall, T., 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.

Auderset, A., S. Moretti, B. Taphorn, P.-R. Ebner, E. Kast, X.T. Wang, R. Schiebel, D.M. Sigman, G.H. Haug, and A. Martínez-García. 2022. “Enhanced Ocean Oxygenation During Cenozoic Warm Periods”. Nature 609: 77-82. doi:10.1038/s41586-022-05017-0.

Kast, E.R., M.L. Griffiths, S.L. Kim, Z.C. Rao, K. Shimada, M.A. Becker, H.M. Maisch, et al. (2022) 2022. “Cenozoic Megatooth Sharks Occupied Extremely High Trophic Positions”. Science Advances 8 (25). doi:10.1126/sciadv.abl6529.

Lueders-Dumont, J.A., A.G. Forden, E.R. Kast, J.A. Mohan, B.D. Walther, D.M. Sigman, and B.B. Ward. 2022. “Controls on the Nitrogen Isotopic Composition of Fish Otolith Organic Matter: Lessons from a Controlled Diet Switch Experiment”. Geochimica Et Cosmochimica Acta 316. Elsevier Ltd: 69-86. doi:10.1016/j.gca.2021.09.030.

Zhang, Eric, Daniel Sigman, and Gerard Wysocki. 2021. “In-Line Optical Subtraction Using a Differential Faraday Rotation Spectrometer for 15NO 14NO Isotopic Analysis”. doi:10.48550/ARXIV.2103.12196.

Farmer, J.R., D.M. Sigman, J. Granger, O.M. Underwood, F. Fripiat, T.M. Cronin, A. Martínez-García, and G.H. Haug. 2021. “Arctic Ocean Stratification Set by Sea Level and Freshwater Inputs since the Last Ice Age”. Nature Geoscience 14. Nature Research: 684-89. doi:10.1038/s41561-021-00789-y.

Swart, K.A., S. Oleynik, A. Martínez-García, G.H. Haug, and D.M. Sigman. 2021. “Correlation Between the Carbon Isotopic Composition of Planktonic Foraminifera-Bound Organic Matter and Surface Water PCO2 across the Equatorial Pacific”. Geochimica Et Cosmochimica Acta 306. Elsevier Ltd: 281-303. doi:10.1016/j.gca.2021.03.007.

Studer, A.S., F. Mekik, H. Ren, M.P. Hain, S. Oleynik, A. Martínez-García, G.H. Haug, and D.M. Sigman. 2021. “Ice Age-Holocene Similarity of Foraminifera-Bound Nitrogen Isotope Ratios in the Eastern Equatorial Pacific”. Paleoceanography and Paleoclimatology 36. John Wiley and Sons Inc. doi:10.1029/2020PA004063.

Leichliter, J.N., T. Lüdecke, A.D. Foreman, N.N. Duprey, D.E. Winkler, E.R. Kast, H. Vonhof, et al. 2021. “Nitrogen Isotopes in Tooth Enamel Record Diet and Trophic Level Enrichment: Results from a Controlled Feeding Experiment”. Chemical Geology 563. Elsevier B.V. doi:10.1016/j.chemgeo.2020.120047.

Sigman, D.M., F. Fripiat, A.S. Studer, P.C. Kemeny, A. Martínez-García, M.P. Hain, X. Ai, X. Wang, H. Ren, and G.H. Haug. 2021. “The Southern Ocean During the Ice Ages: A Review of the Antarctic Surface Isolation Hypothesis, With Comparison to the North Pacific”. Quaternary Science Reviews 254. Elsevier Ltd. doi:10.1016/j.quascirev.2020.106732.

Straub, M., D.M. Sigman, A. Auderset, J. Ollivier, B. Petit, B. Hinnenberg, F. Rubach, S. Oleynik, M.-C. Vozenin, and A. Martínez-García. 2021. “Distinct Nitrogen Isotopic Compositions of Healthy and Cancerous Tissue in Mice Brain and head&Neck Micro-Biopsies”. BMC Cancer 21. BioMed Central Ltd. doi:10.1186/s12885-021-08489-x.

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.

Ai, X.E., A.S. Studer, D.M. Sigman, A. Martínez-García, F. Fripiat, L.M. Thöle, E. Michel, et al. 2020. “Southern Ocean Upwelling, Earth S Obliquity, and Glacial-Interglacial Atmospheric CO2 Change”. Science 370. American Association for the Advancement of Science: 1348-52. doi:10.1126/science.abd2115.

Zhang, R., X.T. Wang, H. Ren, J. Huang, M. Chen, and D.M. Sigman. 2020. “Dissolved Organic Nitrogen Cycling in the South China Sea From an Isotopic Perspective”. Global Biogeochemical Cycles 34. Blackwell Publishing Ltd. doi:10.1029/2020GB006551.

Zhang, X., B.B. Ward, and D.M. Sigman. 2020. “Erratum: Global Nitrogen Cycle: Critical Enzymes, Organisms, and Processes for Nitrogen Budgets and Dynamics (Chemical Reviews (2020) 120:12 (5308-5351) DOI: 10.1021 acs.Chemrev.9b00613)”. Chemical Reviews 120. American Chemical Society: 9834. doi:10.1021/acs.chemrev.0c00743.

Zhang, X., B.B. Ward, and D.M. Sigman. 2020. “Global Nitrogen Cycle: Critical Enzymes, Organisms, and Processes for Nitrogen Budgets and Dynamics”. Chemical Reviews 120. American Chemical Society: 5308-51. doi:10.1021/acs.chemrev.9b00613.

Duprey, N.N., T.X. Wang, T. Kim, J.D. Cybulski, H.B. Vonhof, P.J. Crutzen, G.H. Haug, D.M. Sigman, A. Martínez-García, and D.M. Baker. 2020. “Megacity Development and the Demise of Coastal Coral Communities: Evidence from Coral Skeleton δ15N Records in the Pearl River Estuary”. Global Change Biology 26. Blackwell Publishing Ltd: 1338-53. doi:10.1111/gcb.14923.

Smart, S.M., S.E. Fawcett, H. 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.

Sims, Z.C., A.L. Cohen, V.H. Luu, X.T. Wang, and D.M. Sigman. 2020. “Uptake of Groundwater Nitrogen by a Near-Shore Coral Reef Community on Bermuda”. Coral Reefs 39. Springer: 215-28. doi:10.1007/s00338-019-01879-5.

Lueders-Dumont, J.A., D.M. Sigman, B.J. Johnson, O.P. Jensen, S. Oleynik, and B.B. Ward. 2020. “Comparison of the Isotopic Composition of Fish Otolith-Bound Organic N With Host Tissue”. Canadian Journal of Fisheries and Aquatic Sciences 77. Canadian Science Publishing: 264-75. doi:10.1139/cjfas-2018-0360.

Kast, E.R., D.A. Stolper, A. Auderset, J.A. Higgins, H. Ren, X.T. Wang, A. Martínez-García, G.H. Haug, and D.M. Sigman. 2019. “Nitrogen Isotope Evidence for Expanded Ocean Suboxia in the Early Cenozoic”. Science 364. American Association for the Advancement of Science: 386-89. doi:10.1126/science.aau5784.

Hasenfratz, A.P., S.L. Jaccard, A. Martínez-García, D.M. Sigman, D.A. Hodell, D. Vance, S.M. Bernasconi, H.F. Kleiven, F.A. Haumann, and G.H. Haug. 2019. “The Residence Time of Southern Ocean Surface Waters and the 100,000-Year Ice Age Cycle”. Science 363. American Association for the Advancement of Science: 1080-84. doi:10.1126/science.aat7067.

McRose, D.L., A. Lee, S.H. Kopf, O. Baars, A.M.L. Kraepiel, D.M. Sigman, F.M.M. Morel, and X. Zhang. 2019. “Effect of Iron Limitation on the Isotopic Composition of Cellular and Released Fixed Nitrogen in Azotobacter Vinelandii”. Geochimica Et Cosmochimica Acta 244. Elsevier Ltd: 12-23. doi:10.1016/j.gca.2018.09.023.

Sigman, D.M., and F. Fripiat. 2019. Nitrogen Isotopes in the Ocean. Encyclopedia of Ocean Sciences. Elsevier. doi:10.1016/B978-0-12-409548-9.11605-7.

Auderset, A., A. Martínez-García, R. Tiedemann, A.P. Hasenfratz, T.I. Eglinton, R. Schiebel, D.M. Sigman, and G.H. Haug. 2019. “Gulf Stream Intensification After the Early Pliocene Shoaling of the Central American Seaway”. Earth and Planetary Science Letters 520. Elsevier B.V.: 268-78. doi:10.1016/j.epsl.2019.05.022.

Marconi, D., M.A. Weigand, and D.M. Sigman. 2019. “Nitrate Isotopic Gradients in the North Atlantic Ocean and the Nitrogen Isotopic Composition of Sinking Organic Matter”. Deep-Sea Research Part I: Oceanographic Research Papers 145. Elsevier Ltd: 109-24. doi:10.1016/j.dsr.2019.01.010.

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.

Schlitzer, R., R.F. Anderson, E.M. Dodas, M. Lohan, W. Geibert, A. Tagliabue, A. Bowie, and et al. 2018. “The GEOTRACES Intermediate Data Product 2017”. Chemical Geology 493. Elsevier B.V.: 210-23. doi:10.1016/j.chemgeo.2018.05.040.

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.

Schiebel, R., S.M. Smart, A. Jentzen, L. Jonkers, R. Morard, J. Meilland, E. Michel, et al. 2018. “Advances in Planktonic Foraminifer Research: New Perspectives for Paleoceanography”. Revue De Micropaleontologie 61. Elsevier Masson SAS: 113-38. doi:10.1016/j.revmic.2018.10.001.

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.

Wang, X.T., A.L. Cohen, V. Luu, H. Ren, Z. Su, G.H. Haug, and D.M. Sigman. 2018. “Natural Forcing of the North Atlantic Nitrogen Cycle in the Anthropocene”. Proceedings of the National Academy of Sciences of the United States of America 115. National Academy of Sciences: 10606-11. doi:10.1073/pnas.1801049115.

Studer, A.S., D.M. Sigman, A. Martínez-García, L.M. Thöle, E. Michel, S.L. Jaccard, J.A. Lippold, et al. 2018. “Increased Nutrient Supply to the Southern Ocean During the Holocene and Its Implications for the Pre-Industrial Atmospheric CO2 Rise”. Nature Geoscience 11. Nature Publishing Group: 756-60. doi:10.1038/s41561-018-0191-8.

Smart, S.M., H. 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.

Granger, J., D.M. Sigman, J. Gagnon, J.-E. Tremblay, and A. Mucci. 2018. “On the Properties of the Arctic Halocline and Deep Water Masses of the Canada Basin from Nitrate Isotope Ratios”. Journal of Geophysical Research: Oceans 123. Blackwell Publishing Ltd: 5443-58. doi:10.1029/2018JC014110.