Filchner Overflow, Antarctica; The Filchner Overflow was detected in 1977, when hydrographic sections from the continental slope in the southwestern Weddell Sea revealed a plume of dense, supercooled water emerging from the Filchner depression. The plume consists of Ice Shelf Water (ISW) originating from the Filchner-Ronne Ice Shelf cavity, where it has been cooled from contact with glacial ice at great depth. On the continental slope, the ISW mixes with the ambient water to form Weddell Sea Bottom Water and evenually Antarctic Bottom Water (AABW). AABW occupies a major part of the deep ocean. In my PhD, I analysed data from current meter moorings in the outflow region. We focussed on small-scale variability, and revealed oscillations in the velocity and temperature records with periods of 1.5, 3 and 6 days, that existent theories are unable to explain. We also synthesised all available CTD-data.
Topographic Steering; Due to the earth'r rotation (the Coriolis force), dense plumes will tend to flow along the slope in geostrophic balance. Canyons - and as shown in my PhD-thesis - also ridges cross-cutting the slope, may break this balance and steer plume water down the slope. In my PhD I applied an analytical model to describe the dynamics of these flows, and I further explored flow in canyons/along ridges in laboratory experiments, which I performed at the Geophysical Fluid Dynamics Laboratory, University of Washington and at the rotating Coriolis platform in Grenoble, France.
I am currently involved in the IPY project "Bipolar Thermohaline Atlantic Circulation" (BIAC). I am working at the Geophysical Institute, UiB and attached to the Bjerknes Centre for Climate Research. I am a former UNIS-student.
Curriculum Vitae (CV)