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post Aug 18 2005, 08:19 AM
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TREC Teacher

Group: TREC Team
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Aug 17, 2005

Today we spent the morning organizing gear for our trip home. Sorting gear, cleaning gear, and packing gear was all on the agenda. All the students made presentation in the afternoon concerning their studies. What follows is a brief summary of their work.

Carlos Szembek- Carlos presented on the meteorological effects of glacial ablation on Linnebreen. He noted that this year’s temperatures and precipitation were very different than last years. He also discussed possible causes of glacial ablation including wind and solar radiation and will be using some of his data in climate modeling this fall.

Emily Gercke- Emily presented on Glacier and Stream Dynamics in Linnedalen, Svalbard. She presented information on how ablation effects stream discharge and sediment load. She compared data taken on glacial ablation utilizing level loggers vs. measuring ablation with ablation stakes. She also presented data on historical glacial ablation using aerial photos.

Nora Mattell- Nora presented on the changes in sediment load of Linneelva between the glacial moraine and the lake. She looked at the suspended sediment concentration of the Linne River up near the glacier and at a point near where the river enters the lake. She also examined the factors that caused the sediment load to vary.

Fran Moore- Fran’s presentation was entitled “ Hydrochemical Analysis of the Linne Catchment”. Fran is hoping to find some chemical signal in the water in the Linne River or its tributaries that may be identified in the layers of the lake cores. These signals would be formed from the chemical weathering of the rock surrounding the river and/or its tributaries.

Lauren Perreault- Lauren presented on the alternative sediment sources to Linnevatnet. The sediment that ends up in the cores does not all come from the Linne River. Lauren looked at some of the other sources of these sediments including the alluvial fans and solifluction lobes.

Brian Yellen- Brian presented on his work with Lake Linne summer sediment transport and deposition. Brian characterized sediment transport and correlated it with weather conditions. Some interesting findings so far include the interplay of wind with discharge and the effect of icing on the inlet delta with the deposition of sediment.

Brooks Motley- Brooks examined sedimentation in Lake Linne in a detailed manner over a one year period. He collected sediments from the year long sediment traps, spring sediment traps and summer sediment traps and this fall will quantify sedimentation both temporally and spatially,.

All of this years field work will be invaluable in understanding how the layers in the lake sediment form. This information then can then be used to help understand the climatic conditions in which the sediment layers in the cores formed in the past.
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