Dr Sandra Tippenhauer

Postdoctoral Researcher, Alfred Wegener Institute (AWI)

I am a physicist working in physical oceanography at the Alfred Wegener Institute (AWI), Germany, and a postdoc in the PEANUTS project.

My work mainly focuses on physical and biogeochemical coupling in high latitudes. Within PEANUTS I will investigate physical processes leading to ocean mixing resulting in nutrient fluxes, and assess how these may change in a changing Arctic Ocean.

In recent years I worked within “Frontiers in Arctic Marine Monitoring” (FRAM) to extend the capabilities of an autonomous underwater vehicle (AUV) towards physical oceanography by integrating an acoustic Doppler current profiler (ADCP) and a microstructure profiler (MSP).

With the AUV we investigate biogeochemical coupling on scales smaller than 100 m to understand the physical processes (mixing, fluxes, up- and downwelling, frontal processes) and their impact on biogeochemistry and marine life.

Before, I did my PhD at GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany, in physical oceanography working on topography induced deep ocean mixing. The central instrument of the study was a deep diving AUV newly equipped with an MSP. As technical part of my PhD I developed the processing method.

I graduated in (laser) physics at the Carl Friedrich von Weizsäcker-Centre for Science and Peace Research (ZNF) at the University of Hamburg working on a miniaturised laser setup in the group Atom Trap Trace Analysis (ATTA). The aim is to develop a method to discover clandestine plutonium production. One of the biggest challenges for the Nuclear Non-Proliferation Treaty (NPT) is the exposure of clandestine activities related to the production of fission material for non-civilian projects.