Doctoral position in marine biogeochemistry
Ocean Sciences (OS)
We are looking for a doctoral student in a cross-disciplinary project that incorporates marine biogeochemistry, physical oceanography, and sedimentology with specific focus on the relation between bottom water turbulence, sediment suspension, and bottom water biogeochemistry in the Baltic Sea. The project focuses on direct measurements of microbial turnover rates in the benthic boundary layer for oxygenated, transitional, and anoxic bottom boundary layers in the Baltic Sea. Processes in the turbulent bottom boundary layer are of key importance for benthic-pelagic coupling. The few existing studies point to the importance of this water layer in regulating the exchange betwen sediment and water, but systematic investigations that couple the physical and biogeochemical variability have not been made. In this project investigations will be made in-situ with an automated boundary layer sampler as well as ex-situ, using isotope tracer experiments. The focus of the study will be on the biogeochemistry of the radiatively active trace gases carbon dioxide, methane and nitrous oxide in the boundary layer.
The candidate will join a cross-disciplinary research group with a wide international network, and with expertise within marine biogeochemistry, marine geophysics, and physical oceanography. The main supervisor for the project is Associate Professor Volker Brüchert (Department of Geological Sciences, Stockholm University), but the candidate will also have access to the wider network of scientists within the Baltic Sea Centre at Stockholm University. The candidate will participate in annual ship-based fieldwork aboard the university’s research vessel Electra, where s/he will be trained in all the observational methods mentioned above.