Robert Letscher

Office: Earth Sciences, 142 Morse Hall, Durham, NH 03824
A headshot of Robert Letscher, an assistant professor in the Ocean Process Analysis Laboratory.

Assistant Professor of Chemical Oceanography
Earth Sciences &
Ocean Process Analysis Laboratory


  • Ph.D., University of Miami
  • B.S., University of Miami

Research Interests

  • Biogeochemistry
  • Ocean Modeling
  • Oceanography

Courses Taught

  • ESCI 501: Introduction to Oceanography
  • ESCI 747/847: Aqueous Geochemistry
  • ESCI 752/852: Chemical Oceanography
  • INCO 590: Rsrch Exp/Earth Sciences
  • INCO 790: Adv Rsrch Exp/Earth Science

Selected Publications

Howe, S., Miranda, C., Hayes, C. T., Letscher, R. T., & Knapp, A. N. (2020). The Dual Isotopic Composition of Nitrate in the Gulf of Mexico and Florida Straits. Journal of Geophysical Research: Oceans, 125(9). doi:10.1029/2020jc016047

Letscher, R. T., & Moore, J. K. (2017). Modest net autotrophy in the oligotrophic ocean. Global Biogeochemical Cycles, 31(4), 699-708. doi:10.1002/2016gb005503

Bourbonnais, A., Letscher, R. T., Bange, H. W., Échevin, V., Larkum, J., Mohn, J., . . . Altabet, M. A. (2017). N2O production and consumption from stable isotopic and concentration data in the Peruvian coastal upwelling system. Global Biogeochemical Cycles, 31(4), 678-698. doi:10.1002/2016gb005567

Letscher, R. T., Primeau, F., & Moore, J. K. (2016). Nutrient budgets in the subtropical ocean gyres dominated by lateral transport. Nature Geoscience, 9(11), 815-819. doi:10.1038/ngeo2812

Romera-Castillo, C., Letscher, R. T., & Hansell, D. A. (2016). New nutrients exert fundamental control on dissolved organic carbon accumulation in the surface Atlantic Ocean. Proceedings of the National Academy of Sciences, 113(38), 10497-10502. doi:10.1073/pnas.1605344113

Letscher, R. T., & Moore, J. K. (2015). Preferential remineralization of dissolved organic phosphorus and non-Redfield DOM dynamics in the global ocean: Impacts on marine productivity, nitrogen fixation, and carbon export. Global Biogeochemical Cycles, 29(3), 325-340. doi:10.1002/2014gb004904

Letscher, R. T., Hansell, D. A., Carlson, C. A., Lumpkin, R., & Knapp, A. N. (2013). Dissolved organic nitrogen in the global surface ocean: Distribution and fate. Global Biogeochemical Cycles, 27(1), 141-153. doi:10.1029/2012gb004449

Letscher, R. T., Hansell, D. A., Kadko, D., & Bates, N. R. (2013). Dissolved organic nitrogen dynamics in the Arctic Ocean. Marine Chemistry, 148, 1-9. doi:10.1016/j.marchem.2012.10.002

Letscher, R. T., Hansell, D. A., & Kadko, D. (2011). Rapid removal of terrigenous dissolved organic carbon over the Eurasian shelves of the Arctic Ocean. Marine Chemistry, 123(1-4), 78-87. doi:10.1016/j.marchem.2010.10.002

Letscher, R. T., Moore, J. K., Teng, Y. -C., & Primeau, F. (n.d.). Variable C : N : P stoichiometry of dissolved organic matter cycling in the Community Earth System Model. Biogeosciences, 12(1), 209-221. doi:10.5194/bg-12-209-2015

Most Cited Publications