Allyson Tessin
Biography
My research bridges the fields of oceanography, biogeochemistry, and sedimentary geology, with the goal of understanding the relationship between the marine carbon cycle and climate change. More specifically, I investigate how changes in ocean deoxygenation, land to sea delivery of carbon and nutrients, and benthic-pelagic biogeochemical coupling control changes in the production and preservation of organic carbon. My interdisciplinary approach combines seagoing science, geological fieldwork, and multi-proxy geochemical analyses to advance my overall goal of understanding and predicting the impact of anthropogenic climate change on marine biogeochemical cycles by combining modern process-focused studies with reconstructions of past marine biogeochemical cycling from the sedimentary record.
Education
Expertise
Publications
- Faust, J.C., Tessin, A., Fisher, B.J. et al. Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments. Nat Commun 12, 275 (2021). https://doi.org/10.1038/s41467-020-20550-0
- Tessin, A., A. Chappaz, I. Hendy, and N. Sheldon, 2019, Molybdenum speciation as a paleoredox proxy: a case study from Late Cretaceous Western Interior Seaway black shales, Geology
- Tessin, A., C. Schroder-Adams, N. Sheldon, I. Hendy, and K. Elderbak, 2019, Local versus seaway-wide trends in deoxygenation in the Late Cretaceous Western Interior Seaway. In press at GSA Bulletin
- Tessin, A., T. Bianchi, I. Hendy, N. Sheldon, J. Hutchings, and E. Arnold, 2017, Organic matter source and thermal maturity within the Late Cretaceous Niobrara Formation, US Western Interior, Marine and Petroleum Geology, 86
- Tessin, A., N. Sheldon, I. Hendy, and A. Chappaz, 2016, Iron limitation in the Western Interior Seaway during the Late Cretaceous OAE 3 and its role in phosphorus recycling and enhanced organic matter preservation, Earth and Planetary Science Letters, 449
- Tessin, A., I. Hendy, N. Sheldon, and B. Sageman, 2015, Redox controlled preservation of organic matter during “OAE 3” within the Western Interior Seaway, Paleoceanography
- Lund, D. C., A. C. Tessin, J. L. Hoffman, and A. Schmittner, 2015, Southwest Atlantic watermass evolution during the last deglaciation, Paleoceanography
- Tessin, A. C. and D. C. Lund, 2013, Isotopically depleted carbon in the mid-depth South Atlantic during the last deglaciation, Paleoceanography, 28
