Dr Mark Stevenson's Outputs (3)

Non-avian dinosaur eggshell calcite can contain ancient, endogenous amino acids (2023)
Journal Article
Saitta, E. T., Vinther, J., Crisp, M. K., Abbott, G. D., Wheeler, L., Presslee, S., …Penkman, K. E. (2024). Non-avian dinosaur eggshell calcite can contain ancient, endogenous amino acids. Geochimica et Cosmochimica Acta, 365, 1-20. https://doi.org/10.1016/j.gca.2023.11.016

Proteins are the most stable of the macromolecules that carry genetic information over long periods of time. Closed systems are more likely to retain endogenous proteins or their degradation products. Amino acid racemisation data in experimental and... Read More about Non-avian dinosaur eggshell calcite can contain ancient, endogenous amino acids.

Unprecedented sea-ice minima enhances algal production deposited at the Arctic seafloor (2023)
Journal Article
Stevenson, M. A., Airs, R. L., & Abbott, G. D. (2023). Unprecedented sea-ice minima enhances algal production deposited at the Arctic seafloor. Environmental Research Letters, 18(11), Article 114046. https://doi.org/10.1088/1748-9326/ad044a

Sea-ice in the Arctic is declining, with 2018 a particularly low year for ice extent, driven by anomalously warm atmospheric circulation in winter 2017/18. This is consistent with a multi-decadal trend to an earlier ice-free Barents Sea as climate ch... Read More about Unprecedented sea-ice minima enhances algal production deposited at the Arctic seafloor.

Biomarker proxies for reconstructing Quaternary climate and environmental change (2023)
Journal Article
McClymont, E. L., Mackay, H., Stevenson, M. A., Damm-Johnsen, T., Honan, E. M., Penny, C. E., & Cole, Y. A. (2023). Biomarker proxies for reconstructing Quaternary climate and environmental change. Journal of Quaternary Science, 38(7), 991-1024. https://doi.org/10.1002/jqs.3559

To reconstruct past environmental changes, a range of indirect or proxy approaches can be applied to Quaternary archives. Here, we review the complementary and novel insights which have been provided by the analysis of chemical fossils (biomarkers).... Read More about Biomarker proxies for reconstructing Quaternary climate and environmental change.