Abstract
Part I of this thesis is on long-term iceberg collision-risk assessment methods for fixed offshore structures. Estimates for the long-term probability that an iceberg will hit a fixed offshore structure are based on estimates of the total volume of produced iceberg, a model for the size distribution of icebergs and a description of how iceberg trajectories ``fill`` the plane (the ocean`s surface). Part II of the thesis discusses methods for analysis of low resolution data in the sense that the size of the area covered by each pixel is not small compared to the dominating floes. Still, this type of data can provide estimates of the ice extent (and hence the ice edge) and ice concentration. The estimates of the ice edge (at least) seem to be physically significant in the sense that ``in some way`` they can reflect ice drift in an image time sequence. A priori this is far from obvious. A central idea is that the ``ice edge`` is close to a transition zone between two different temperature regimes in the polar oceans. The estimates of the ice edges for the three Synthetic-Aperture Radar (SAR) mosaics provided for this thesis are plotted in the same figure and
More>>
Citation Formats
Korsnes, R.
Statistical description and estimation of ocean drift ice environments.
Norway: N. p.,
1991.
Web.
Korsnes, R.
Statistical description and estimation of ocean drift ice environments.
Norway.
Korsnes, R.
1991.
"Statistical description and estimation of ocean drift ice environments."
Norway.
@misc{etde_10141611,
title = {Statistical description and estimation of ocean drift ice environments}
author = {Korsnes, R}
abstractNote = {Part I of this thesis is on long-term iceberg collision-risk assessment methods for fixed offshore structures. Estimates for the long-term probability that an iceberg will hit a fixed offshore structure are based on estimates of the total volume of produced iceberg, a model for the size distribution of icebergs and a description of how iceberg trajectories ``fill`` the plane (the ocean`s surface). Part II of the thesis discusses methods for analysis of low resolution data in the sense that the size of the area covered by each pixel is not small compared to the dominating floes. Still, this type of data can provide estimates of the ice extent (and hence the ice edge) and ice concentration. The estimates of the ice edge (at least) seem to be physically significant in the sense that ``in some way`` they can reflect ice drift in an image time sequence. A priori this is far from obvious. A central idea is that the ``ice edge`` is close to a transition zone between two different temperature regimes in the polar oceans. The estimates of the ice edges for the three Synthetic-Aperture Radar (SAR) mosaics provided for this thesis are plotted in the same figure and the movement seems to be continous and reflects ice drift. Part III of the thesis discusses quantitative (and automatic) methods for high resolution imagery data. Here, the size of the area covered by each pixel is small compared to the dominating floes. 46 refs. 47 figs., 2 tabs.}
place = {Norway}
year = {1991}
month = {Apr}
}
title = {Statistical description and estimation of ocean drift ice environments}
author = {Korsnes, R}
abstractNote = {Part I of this thesis is on long-term iceberg collision-risk assessment methods for fixed offshore structures. Estimates for the long-term probability that an iceberg will hit a fixed offshore structure are based on estimates of the total volume of produced iceberg, a model for the size distribution of icebergs and a description of how iceberg trajectories ``fill`` the plane (the ocean`s surface). Part II of the thesis discusses methods for analysis of low resolution data in the sense that the size of the area covered by each pixel is not small compared to the dominating floes. Still, this type of data can provide estimates of the ice extent (and hence the ice edge) and ice concentration. The estimates of the ice edge (at least) seem to be physically significant in the sense that ``in some way`` they can reflect ice drift in an image time sequence. A priori this is far from obvious. A central idea is that the ``ice edge`` is close to a transition zone between two different temperature regimes in the polar oceans. The estimates of the ice edges for the three Synthetic-Aperture Radar (SAR) mosaics provided for this thesis are plotted in the same figure and the movement seems to be continous and reflects ice drift. Part III of the thesis discusses quantitative (and automatic) methods for high resolution imagery data. Here, the size of the area covered by each pixel is small compared to the dominating floes. 46 refs. 47 figs., 2 tabs.}
place = {Norway}
year = {1991}
month = {Apr}
}