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    04-05 AR

Adam Gully: Spring 2005 Final Report

Sea Ice is a heterogeneous material that consists of ice, brine, and air pockets. When seawater freezes, the ice crystals separate from the salts, leaving brine pockets trapped in pure ice. The microstructure of Sea Ice can change dramatically depending on the temperature and age of the Sea Ice. These factors make Sea Ice a very complex material.

It is important to establish parameters for the physical properties of Sea Ice. One method called "remote sensing" can be used to collect data about Sea Ice from ships, planes, or satellites. By sending a comparatively long electromagnetic wave into the smaller microstructure of the Sea Ice, information about the physical properties of the Sea Ice can be determined by analyzing the electromagnetic response.

The forward problem needs to be understood to use remote sensing successfully. The forward problem involves making assumptions about the physical properties of the Sea Ice and predicting the electromagnetic response. The technique used in remote sensing is the inverse or backward problem, namely, collecting the electromagnetic response and determining information about the physical properties of the Sea Ice.

During the past semester, I began looking at the inverse problem and successfully finished recreating the forward problem parameters. I was also fortunate enough to go to Alaska in February with Dr. Golden. I had the unique and valuable experience of viewing the research of other scientists and witnessing Sea Ice experiments conducted in a lab. Throughout the semester, I attended presentations given by other REU students. On April 20, I presented work I have done though the REU program in front of other REU students and some faculty members. It was a wonderful opportunity to fully understand and appreciate the amount of effort required for a presentation. I learned from the experience of presenting in front of an audience.

At the end of May 2005, I will travel again to Alaska to collaborate with Dr. Lars Backstrom about our similar research. In addition, I will start investigating the forward and inverse problems at different frequencies.
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