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Marine boundary layer stable water isotope variability in the Southern Ocean
(2019)The Southern Ocean overturning strength constitutes an essential control mecha- nism for future anthropogenic carbon uptake. The atmospheric water cycle, in turn, exerts an influence on upwelling intensity via buoyancy forcing induced by fresh- water fluxes. Stable water isotopes (H216O, H218O, HDO) are a powerful tool to constrain processes of the atmospheric water cycle and can therefore help to gain a more comprehensive picture on the ...Master Thesis -
Combined climate-ice flow modelling of the Alpine Ice Field during the Last Glacial Maximum
(2021)Doctoral Thesis -
Ice spheres in snow mechanics: microstructural analyses, experiments, and simulations
(2021)Doctoral Thesis -
Adapting climate science
(2020)Much scholarship has argued that information on future climate change ought to be the basis for climate adaptation decisions. But how has the impressive corpus of knowledge produced by climate scientists been processed and adapted to inform adaptation decisions in practice? This doctoral thesis compares and analyses how different actors have ap-proached, grappled with, understood, generated relevance and acted upon climate science for ...Doctoral Thesis -
Exploring topographic and scaling properties of landscapes by dimensionally analyzing stream-power incision and linear diffusion landscape evolution models
(2020)In this PhD project, I dimensionally analyzed a frequently used landscape evolution model (LEM) and I derived geomorphological interpretations of the characteristic scales and dimensionless numbers that were revealed by the analysis. I studied an LEM with terms of stream-power incision, linear diffusion, and uniform uplift, parameterized by an incision coefficient K, a diffusion coefficient D, and an uplift rate U, respectively. ...Doctoral Thesis -
3D Shape Fabrication from Flat Material Sheets
(2020)Digital fabrication has been a research area of huge interest in recent years, since it enables the fast creation of objects from digital models. Next to state-of-the-art technologies like 3D printing or more traditional CNC milling, techniques focused on flat materials are of interest, since modern laser cutters are fast and afford a large variety of cheap and durable materials, like plywood, acrylic glass or fabric. Previous methods for ...Doctoral Thesis -
Cloud droplet activity of soot particles after exposure to ozone at atmospheric conditions
(2019)The impact of soot emissions on global climate is a topic of ongoing discussions. On one side, atmospheric soot particles have a warming effect since they absorb solar radiation (direct aerosol effect). On the other side, there are indications that soot particles could contribute to the formation of clouds, which would have a cooling effect and might offset their warming effect (indirect aerosol effect). However, there is no consensus ...Doctoral Thesis -
Numerical approximation methods for high-dimensional partial differential equations of second order
(2020)Classical numerical approximation methods for partial differential equations typically suffer from the so-called curse of dimensionality. This means that the computational effort for calculating an approximation of a desired approximation accuracy grows exponentially in the dimension of the partial differential equation. The present thesis deals with different approximation methods for several classes of partial differential equations ...Doctoral Thesis