Jannik Martens

I am an earth and environmental scientist with interests in climate change and carbon cycling. My experience and area of expertise include marine geology, paleoclimate research, isotope geochemistry and molecular analysis of organic matter.

Fields of Interest

My scientific interests are in the field of global carbon cycling, climate-carbon couplings and paleoceanography, with specific focus on the Arctic region.


  • 2021 Ph.D. (Environmental Science) Stockholm University, Sweden
  • 2016 M.Sc. (Quaternary Science) University of Cologne, Germany
  • 2014 B.Sc. (Physical Geography) University of Cologne, Germany

Nybom, I., Horlitz, G., Gilbert, D., Berrojalbiz, N., Martens, J., Arp, H.P., and Sobek, A. (2021), Effects of Organic Carbon Origin on Hydrophobic Organic Contaminant Fate in the Baltic Sea. Environmental Science & Technology, 55, 19, 13061-13071. https://doi.org/10.1021/acs.est.1c04601

Martens, J., Romankevich, E., Semiletov, I., Wild, B., van Dongen, B., Tesi, T., Shakhova, N., Dudarev, O. V, Kosmach, D., Vetrov, A., Lobkovsky, L., Belyaev, N., Macdonald, R., Pieńkowski, A. J., Haghipour, N., Dahle, S., Carroll, M. L., Åström, E. K., Grebmeier, M., Cooper, L. W., Possnert, G. and Gustafsson, Ö. (2021). CASSCADE - The Circum-Arctic Shelf Sediment CArbon DatabasE. Earth System Science Data, 13, 2561–2572. https://doi.org/10.5194/essd-13-2561-2021

Martens, J., Wild, B., Muschitiello, F., O’Regan, M., Jakobsson, M., Semiletov, I., Dudarev, O. V. and Gustafsson, Ö. (2020). Remobilization of dormant carbon from Siberian-Arctic permafrost during three past warming events. Science Advances, 6 (42). https://doi.org/10.1126/sciadv.abb6546

Muschitiello, F., O'Regan, M., Martens, J., West, G., Gustafsson, Ö., and Jakobsson, M. (2020). A new 30 000-year chronology for rapidly deposited sediments on the Lomonosov Ridge using bulk radiocarbon dating and probabilistic stratigraphic alignment. Geochronology, 2, 81–91. https://doi.org/10.5194/gchron-2-81-2020

Martens, J., Wild, B., Pearce, C., Tesi, T., Andersson, A., Bröder, L., O’Regan, M., Jakobsson, M., Sköld, M., Gemery, L., Cronin, T. M., Semiletov, I., Dudarev, O. V. and Gustafsson, Ö. (2019). Remobilization of old permafrost carbon to Chukchi Sea sediments during the end of the last deglaciation. Global Biogeochemical Cycles, 33. https://doi.org/10.1029/2018GB005969

Tanski, G., et al. incl. Martens, J. (2019). The Permafrost Young Researchers Network (PYRN) is getting older: The past, present, and future of our evolving community. Polar Record, 55 (4), 216-219. https://doi.org/10.1017/S0032247418000645