I am a physical oceanographer working mostly with observations from high latitudes. My current research focus is on water mass transformation through air-ice-sea interaction leading to dense-water formation and on the pathways of this dense water toward the overflows across the Greenland-Scotland Ridge. In particular, I'm studying the structure, volume transport, variability, and dynamics of the boundary currents in the Nordic Seas that sustain the lower limb of the Atlantic Meridional Overturning Circulation. I have also worked with tidal currents and their seasonal enhancement by continental shelf waves in Antarctica.
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Renfrew, I.A., Huang, J., Semper, S., Barrell, C., Terpstra, A., Pickart, R.S., Våge, K., Elvidge, A.D., Spengler, T., Strehl, A., Weiss, A. (submitted): Coupled atmosphere-ocean observations of a cold air outbreak and its impact on the Iceland Sea, Quarterly Journal of the Royal Meteorological Society.
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Semper, S., Glessmer, M.S., Våge, K., and Pickart, R.S. (2022): How warm Gulf Stream water sustains a cold underwater waterfall, Frontiers for Young Minds, 10:765740. doi: 10.3389/frym.2022.765740.
Våge, K., Semper, S., Valdimarsson, H., Jónsson, S., Pickart, R.S., and Moore, G.W.K. (2022): Water mass transformation in the Iceland Sea: Contrasting two winters separated by four decades, Deep-Sea Research I: Oceanographic Research Papers, 103824, https://doi.org/10.1016/j.dsr.2022.103824.
Semper, S., Våge, K., Pickart, R.S., Jónsson, S., and Valdimarsson, H. (2022): Evolution and transformation of the North Icelandic Irminger Current along the north Iceland shelf, Journal of Geophysical Research: Oceans, 127, e2021JC017700, https://doi.org/10.1029/2021JC017700.
Semper, S., Pickart, R.S., Våge, K., Larsen, K.M.H., Hátún, H., and Hansen, B. (2020): The Iceland-Faroe Slope Jet: a conduit for dense water toward the Faroe Bank Channel overflow, Nature Communications, 11, 5390, https://doi.org/10.1038/s41467-020-19049-5.
Renfrew, I.A. and 65 others (2019): The Iceland Greenland Seas Project, Bull. Amer. Meteor. Soc., 100, 1795–1817, https://doi.org/10.1175/BAMS-D-18-0217.1.
Semper, S., Våge, K., Pickart, R.S., Valdimarsson, H., Torres, D.J., and Jónsson, S. (2019): The emergence of the North Icelandic Jet and its evolution from northeast Iceland to Denmark Strait, Journal of Physical Oceanography, 49, 2499-2521, https://doi.org/10.1175/JPO-D-19-0088.1.
Zhao, J., Yang, J., Semper, S., Pickart, R.S., Våge, K., Valdimarsson, H., Jónsson, S. (2018): A numerical study of interannual variability in the North Icelandic Irminger Current, Journal of Geophysical Research: Oceans, 123, https://doi.org/10.1029/2018JC013800.
Bertler, N.A.N. and 70 others (2018): The Ross Sea Dipole – temperature, snow accumulation and seaice variability in the Ross Sea region, Antarctica, over the past 2700 years, Climate of the Past, 14 (2), 193, https://doi.org/10.5194/cp-14-193-2018.
Pyne, R., Keller, E., Canessa, S., Bertler, N., Pyne, A., Mandeno, D., Vallelonga, P., Semper, S., Kjær, H., Hutchinson, E., Baisden, T. (2018): A Novel Approach to Process Brittle Ice for Continuous Flow Analysis of Stable Water Isotopes, Journal of Glaciology, 64, 244, 289–99, https://doi.org/10.1017/jog.2018.19.
Semper, S. and Darelius, E. (2017): Seasonal resonance of diurnal coastal trapped waves in the southern Weddell Sea, Antarctica, Ocean Science, 13(1), 77-93, https://doi.org/10.5194/os-13-77-2017.
My current project, Supply of dense water to the overflows across the Greenland-Scotland Ridge (SUPERFLOW), is funded by a Marie Skłodowska-Curie Actions Individual Fellowship under the European Union's Horizon 2020 research and innovation programme.
- Ph.D. Physical Oceanography
University of Bergen, Norway, 2020
- M.Sc. Climate Dynamics (Meteorology and Oceanography)
University of Bergen, Norway, 2015
- B.Sc. Physics of the Earth: Meteorology - Oceanography - Geophysics
University of Kiel, Germany, 2013