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
M.S. University of Michigan
B. Phil. University of Pittsburgh
B.A. University of Pittsburgh
Expertise
paleoceanography
Arctic change
Publications
- Hayes, C., Costa, K.M., Anderson, R.F.,....Tessin, A., et al. 2021.Global Ocean Sediment Composition and Burial Flux in the Deep Sea, Global Biogeochemical Cycles.
- Freitas, F.S., Arndt, S., Hendry, K.R., Faust, J.C., Tessin, A.C., Marz, C. 2022. Organic Matter Transformation Drives pH and Carbonate Chemistry in Arctic Marine Sediments, Global Biogeochemical Cycles
- Ward, J., Hendry, K., Arndt, S., Faust, J.,... Tessin, A. et al. 2022. Stable Silicon Isotopes Uncover a Mineralogical Control on the Benthic Silicon Cycle in the Arctic Barents Sea, Geochimica et Cosmochimica Acta
- Ward, J., Hendry, K., Arndt, S., Faust, J., Freitas, F., Henley, S., Krause, J., Marz, C., Ng, H., Pickering, R., Tessin, A. et al. 2022. Benthic Silicon Cycling in the Arctic Barents Sea: a Reaction-Transport Model Study, Biogeosciences
- Marz, C., Freitas, F.S., Godbold, J.A., Henley, S.F., Tessin, A.C., et al. 2022 Biogeochemical consequences of a changing Arctic shelf seafloor ecosystem, Ambio
- 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
- Horner, S.H., Little, T.M., ...Tessin, A., et al. 2021. Bioactive trace metals and their isotopes as paleoproductivity proxies: An assessment using GEOTRACES-era data, Global Biogeochemical Cycles
