Island

• Main Authors: Zur Erlangung, Doktorgrades Naturwissenschaften
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Kara Sea; Sea ice
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1030.2946; http://ediss.sub.uni-hamburg.de/volltexte/2012/5610/pdf/Dissertation.pdf

In this thesis land-fast ice is modelled based on the internal dynamics of sea ice. The region of interest is the Kara Sea, which has a well documented semi-permanent fast-ice cover. The Kara Sea fast ice is especially interesting because it forms over relatively deep waters compared to the maximum thickness of pressure ridges. This means that internal ice stresses must play an important role, in addition to the well-known grounding of pressure ridges. The main objective here is therefore to model the internal stresses of the ice well enough to reproduce the observed fast-ice cover. This has not been done successfully before. The model and methods developed here are general and should be applicable to other areas of fast-ice growth. In order to accurately model land-fast ice an improved version of the well-known viscous-plastic model is used. To produce a more physically realistic model material different yield curves are proposed while some numerical properties of the model are improved. The transition from plasticity to