Jannik Martens

I am an Earth and environmental scientist with an interest 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. Below is a summary of my key interests and contributions.

Fields of Interest

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

Please visit my Google Scholar and Researchgate accounts to learn more about my research. You can also find more information about my upcoming participation in Expedition 400 of the International Ocean Discovery Program (IODP) to NW Greenland, as well as my participation in the ISSS-2020 Arctic Ocean Expedition under the highlighted links. 


  • 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

Martens, J., Mueller, C.W., Joshi, P., Rosinger, R., Maisch, M., Kappler, A., Bonkowski, M., Schwamborn, G., Schirrmeister, L., and Rethemeyer, J. (2023), Stabilization of Mineral-Associated Organic Carbon in Pleistocene Permafrost. Nature Communications 14, 2120. https://doi.org/10.1038/s41467-023-37766-5.

Martens, J., Wild, B., Semiletov, I., Dudarev, O. and Gustafsson, Ö. (2022), Circum-Arctic release of terrestrial carbon varies between regions and sources. Nature Communications 13, 5858. https://doi.org/10.1038/s41467-022-33541-0

Matsubara, F., Wild, B., Martens, J., Andersson, A., Wennström, R., Bröder, L., Dudarev, O., Semiletov, I., and Gustafsson, Ö. (2022). Molecular-multiproxy assessment of land-derived organic matter degradation over extensive scales of the East Siberian Arctic Shelf Seas. Global Biogeochemical Cycles, 36, e2022GB007428. https://doi.org/10.1029/2022GB007428

Dudarev, O., Charkin, A., Shakhova, N., Ruban, A., Chernykh, D., Vonk, J., Тesi, T., Martens, J., Pipko, I., Pugach, S., Leusov, A., Grinko, A., Gustafsson, Ö., and Semiletov, I. (2022), East Siberian Sea: interannual heterogeneity of the suspended particulate matter and its biogeochemical signature. Progress in Oceanography
102903. https://doi.org/10.1016/j.pocean.2022.102903

Chuvilin, E., Bukhanov, B., Yurchenko, A., Davletshina, D., Shakhova, N., Spivak, E., Rusakov, V., Dudarev, O., Khaustova, N., Tikhonova, A., Gustafsson, O., Tesi, T., Martens, J., Jakobsson, M., Spasennykh, M. and Semiletov, I. (2022). In-situ temperatures and thermal properties of the East Siberian Arctic shelf sediments: Key input for understanding the dynamics of subsea permafrost. Marine and Petroleum Geology, 138, 105550. https://doi.org/10.1016/j.marpetgeo.2022.105550

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). CASCADE - The Circum-Arctic Sediment CArbon DatabasE. Earth System Science Data, 13, 2561–2572. https://doi.org/10.5194/essd-13-2561-2021

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., 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