Essays about: "dust layer"
Showing result 1 - 5 of 12 essays containing the words dust layer.
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1. Reconstructing Past Climate by Grain Size and Magnetic Susceptibility Analysis of Belgium Loess From the Late Quaternary
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : Aeolian dust that gets deposited builds up loess sequences that cover 10% of the Earth's continents. Such sequences can be several metres thick with material deposited over thousands of years, and therefore act like archives of past climates. READ MORE
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2. Determination of the homogeneity of the detection efficiency of silicon detectors using light ions
University essay from Uppsala universitet/Tillämpad kärnfysikAbstract : In this project, the homogeneity of the detection efficiency of two silicon detectors were examined using a radioactive alpha-source, 241Am, to study the surfaces of the detectors by exposing a small part of the detector at a time. By then observing the variations of the deposited alpha-energies at different positions on the detector, one can map the differences in the homogeneity of the surface. READ MORE
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3. Biochar-based thin-layer capping of contaminated sediment in Burefjärden, northern Sweden : Assessment of biochar mixed into four structural materials for preventing release of trace elements from sediment to water
University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurserAbstract : Coastal areas around the world have been recognized as largely impacted by anthropogenic activities resulting in pollution of marine sediments. In Sweden, surveys conducted along the coastline of the Bothnian Bay have identified a total area of about 29 km2 as fiber rich sediments. READ MORE
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4. Secondary aerosol formation from dimethyl sulfide - Smog chamber experiments and detailed process modelling
University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionenAbstract : The aim of this thesis was to investigate the secondary aerosol formation from dimethylsulfide (DMS) using the aerosol dynamics, gas- and particle-phase chemistry kinetic multi-layer model, ADCHAM. The first simulations, concerning the butanol oxidation via hydroxyl radicals (OH), were performed to characterize the UV-light source of the AURA smog chamber (Aarhus university, Denmark), later used for the DMS experiments. READ MORE
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5. OSL Dating and Grain Size Analysis: A Case Study in Brattforsheden and the Siljan Area in Central Sweden
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : The geomorphological evolution of areas in Central Sweden after their deglaciation from the Fennoscandian Ice Sheet (FeIS) retreat has been a topic of study in the past, with more extensive work being done the more recent years. It is assumed that the FeIS retreat produced big quantities of fine material, which then could be deposited in the newly exposed areas. READ MORE