Portrait of Jonathan Raberg
Postdoctoral Scholar
• Paleoclimatology • Organic geochemistry • Quaternary research • Spectroscopy


I'm interested in using organic geochemical proxies, especially brGDGTs, to study the paleoclimate/paleoecology of Baffin Island and Iceland and constrain predictions for future Arctic warming and climate change. 


  • PhD, Geological Sciences: University of Colorado Boulder, 2021
  • MS, Chemistry: University of California, Berkeley, 2015
  • BA, Chemistry: Carleton College, 2012


Selected publications

Raberg, J., Flores, E., Crump, S., de Wet, G., Dildar, N., Miller, G., Geirsdóttir, Á., and Sepúlveda, J., 2022: Intact polar brGDGTs in Arctic lake catchments: Implications for lipid sources and paleoclimate applications. Journal of Geophysical Research, Biogeosciences, 127(10). DOI: 10.1029/2022JG006969.

Crump, C., Fréchette, B., Power, M., Cutler, S., de Wet, G., Raynolds, M. K., Raberg, J., Briner, J. P., Thomas, E. K., Sepúlveda, J., Shapiro, B., Bunce, M., and Miller, G. H., 2021: Ancient plant DNA reveals High Arctic greening during the Last Interglacial. Proceedings of the National Academy of Sciences, 118(13): e2019069118. DOI: 10.1073/pnas.2019069118

Raberg, J., Harning, D., Crump, S., de Wet, G., Blumm, A., Kopf, S., Geirsdóttir, Á., Miller, G. H., and Sepúlveda, J., 2021: Revised fractional abundances and warm-season temperatures substantially improve brGDGT calibrations in lake sediments. Biogeosciences, 18(12): 3579-3603. DOI: 10.5194/bg-18-3579-2021

Raberg, J., Vatamanu, J., Harris, S. J., van Oversteeg, C. H. M., Ramos, A., Borodin, O., and Cuk, T. 2019: Probing electric double-layer composition via in situ vibrational spectroscopy and molecular simulations. Journal of Physical Chemistry Letters, 10(12): 3381-3389. DOI: 10.1021/acs.jpclett.9b00879