Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 261 for “"sea-ice"”.
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Modelling sea ice floe fields
This thesis is concerned with the modelling of sea ice, particularly in regions where it is composed of individual floes interacting through collisions. This has been done by modifying and extending existing models that have demonstrated their ability to simulate sea ice in various Arctic and …
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Crystal alignment in sea ice
The c-axes of grains in a sheet of sea ice not only lie in the plane perpendicular to the direction of heat flow but also may align about a particular axis in that plane. It has been suggested that the existence of horizontal temperature gradients or the current at the ice-water interface are …
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A Coupled Atmosphere - Sea Ice Model Study of the Role of Sea Ice in Climatic Predictability
… 10 simulations with a coupled atmosphere-sea ice model are made and a 30-day mean climatic state is calculated for each ensemble for the period of November 11 to December 10. Initially, the light ice ensemble has a thick ice cover extending southward to 75(DEGREES)N. The heavy ice ensemble …
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A coupled atmosphere-sea ice model study of the role of sea ice in climatic predictability
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-16T15:17:03Z No. of bitstreams: 1 1982_bennett.pdf: 6713787 bytes, checksum: 16bc136dcf3930484756f727053a5d5f (MD5)
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Polar Sea Ice Mapping for SeaWinds
… observe global climate indicators such as polar sea ice. Advances in microwave remote sensing technology have allowed a large-scale and detailed study of sea ice characteristics. This thesis provides the analysis and development of sea ice mapping algorithms for the SeaWinds scatterometer. First, …
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The convective desalination of sea ice
… fundamental processes affecting the growth of sea ice in the polar oceans in order to improve climate models. Newly formed sea ice contains a significant amount of salt as liquid brine in the interstices of an ice matrix. My focus is on one of the processes by which the salt content of sea ice …
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Ocean fronts formed at sea ice boundaries
Meltwater input from sea ice forms a buoyancy source for the upper ocean which creates a strong density gradient in both horizontal and vertical directions. If, in particular, the ocean density front is formed in the Bering sea during winter, the frontal dynamics are influenced by local shelf/slope …
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Factors Influencing the Morphology of Sea Ice
Due to the continuous melting of sea ice and rising sea levels, more studies are conducted on sea ice morphology and factors influencing the growth of ice. Sea ice is an integral part of the global climate system. It plays a vital role in the polar ecosystem, providing a habitat for organisms. Sea …
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Investigation of the Interactions Between Sea Ice Algae from the Marginal Ice Zone of Antarctica and Artificial Sea Ice
Sea ice is multi-phase system that plays a major role in the Earth's climate system. Sea ice algae act as primary producers of organic carbon, forming the building blocks
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Morphological approaches to understanding Antarctic Sea ice thickness
Sea ice thickness has long been an under-measured quantity, even in the satellite era. The snow surface elevation, which is far easier to measure, cannot be directly converted into sea ice thickness estimates without knowledge or assumption of what proportion of the snow surface consists of snow …
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Polar Region Sea Ice Classification With Multimodal Learning
… accurate monitoring and classification of sea ice. This thesis presents a multimodal learning approach for classifying polar sea ice thickness using both satellite imagery and altimetry data. The objective is to distinguish between thick ice, thin ice, and open water, which are crucial for …
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Microbial Evolution In Sea Ice: Communities To Genes
Microbial communities encased in growing sea ice must contend with the combined stresses of low temperature and high salinity, environmental pressures that only intensify over the course of the winter. This harsh physical environment was expected to negatively impact both the abundance and …
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Iodine in sea ice and the polar atmosphere.
… the ocean and release to the atmosphere in the ice-covered polar regions has been studied. Laboratory experiments involving sea ice- and ice associated- diatoms have shown how the extreme conditions experienced in sea ice brine channels may lead to an increase in production of organic forms of …
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Morphological approaches to understanding Antarctic Sea ice thickness
Sea ice thickness has long been an under-measured quantity, even in the satellite era. The snow surface elevation, which is far easier to measure, cannot be directly converted into sea ice thickness estimates without knowledge or assumption of what proportion of the snow surface consists of snow …
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Potential impacts of sea ice and ship traffic change to caribou sea ice crossing areas surrounding King William Island, Nunavut, Canada
… (Rangifer tarandus, tuktuit in Inuktitut) use sea ice to facilitate movements that fulfill their ecological needs. Ship traffic is growing in the Kitikmeot region of Nunavut, and ice-strengthened ships can disrupt sea ice by breaking it apart. This project explored priorities identified by …
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Synoptic weather systems over Antarctic sea ice: understanding the link between extratropical cyclones and extreme variability in Antarctic sea-ice concentration
… extratropical cyclones can promote change in sea-ice concentration at a synoptic scale, however, the extreme variability in synoptic-scale sea-ice concentration and the extent to which it is engendered by cyclones has not yet been studied. This thesis seeks to quantify extreme variability of …
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Reversibility of Sea Ice and Climate under Global Change
… by recent satellite observations of Arctic sea ice age, we investigate how the properties of first-year and multiyear ice regulate sea ice area and volume. Using an autoregressive model of sea ice and numerical simulation with a global dynamic-thermodynamic sea ice model that traces …
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Growth and motion at the Weddell Sea ice edge
The formation of sea ice in the presence of turbulence was studied using data from drifting buoy<br/>deployments and ice sampling in the Weddell Sea during April 2000. The study sought to<br/>improve understanding of pancake ice in terms of dynamics, heat fluxes, ice growth rates …
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Characterization of Bacteria From the Sea Ice of Antarctica
Bacteria isolated from the sea ice of Antarctica were brought to Southwest Missouri State University for study. Using typical characterization methods, an attempt was made to classify these organisms. They are Gram negative psychrophiles with a tendency to form filaments. The members of one group …
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