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Contact ChristinaRiesselman

Office Marine Science: 310 Castle Street, room 150, Geology: room GN1
Tel Marine Science +64 3 479 5732, Geology +64 3 479 7505
Emailchristina.riesselman@otago.ac.nz

Academic qualifications

BA (University of Nebraska-Lincoln)
PhD (Stanford University)

Research interests

  • Cenozoic paleoceanography and paleoclimate
  • Antarctic climate evolution
  • Micropaleontology (diatoms)
  • Geochemical proxies of paleoenvironmental change

I am a paleoceanographer with a focus on Southern Ocean response to changing climate. My research uses stable isotope geochemistry and diatom micropaleontology in marine sediments to examine the evolution of the Antarctic cryosphere through the Cenozoic. In support of these aims, I also participate in collaborative investigations into the modern controls on phytoplankton community structure. This modern-process research underscores the role of biogenic marine sedimentation as a uniquely sensitive recorder of past conditions, both geochemically and from an assemblage-based perspective.

I am also a member of the Coastal People: Southern Skies collaboration that connects communities with world-leading, cross-discipline research to rebuild coastal ecosystems.
Coastal People: Southern Skies

Riesselman1
Examining the sediment-water interface aboard the RVIB Nathanial B. Palmer. Photo credit: R Stevens.

Courses

Postgraduate students

Jacob Anderson - Thesis Title (PhD): Determining Antarctica's terrestrial climate history from microbial populations in permafrost

Publications

Duke, G., Frazer, J., Taylor-Silva, B., & Riesselman, C. (2024). Two new clavate Fragilariopsis and one new Rouxia diatom species with biostratigraphic and paleoenvironmental applications for the Pliocene-Pleistocene, East Antarctica. Journal of Micropalaeontology, 43(1), 139-163. doi: 10.5194/jm-43-139-2024 Journal - Research Article

Das, S. K., Mahanta, N., Sahoo, B., Singh, R. K., Alvarez Zarikian, C. A., Tiwari, M., … Riesselman, C. R., … Zhao, X. (2024). Late Miocene to Early Pliocene paleoceanographic evolution of the Central South Pacific: A deep-sea benthic foraminiferal perspective. Palaeogeography, Palaeoclimatology, Palaeoecology, 647, 112252. doi: 10.1016/j.palaeo.2024.112252 Journal - Research Article

Truax, O. J., Riesselman, C. R., Wilson, G. S., Stevens, C. L., Parker, R. L., Lee, J. I., … Dagg, B., & Yoo, K.-C. (2024). Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity. Quaternary Science Reviews, 332, 108635. doi: 10.1016/j.quascirev.2024.108635 Journal - Research Article

Torricella, F., Truax, O., Morelli, D., Battaglia, F., Corradi, N., Crosta, X., … Riesselman, C., … Colizza, E. (2024). Multi-proxy paleoenvironmental reconstruction of Robertson Bay, East Antarctica, since the last glacial period. Quaternary Science Reviews, 332, 108629. doi: 10.1016/j.quascirev.2024.108629 Journal - Research Article

Lamy, F., Winckler, G., Arz, H. W., Farmer, J. R., Gottschalk, J., Lembke-Jene, L., … Moy, C. M., … Riesselman, C. R., … Zhao, X. (2024). Five million years of Antarctic Circumpolar Current strength variability. Nature, 627, 789-796. doi: 10.1038/s41586-024-07143-3 Journal - Research Article

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