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 9 of 9 for “"tracer experiment"”.
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EFFECTS OF NITROGEN DEPOSITION ON BOREAL BOGS: A THREE YEAR NITROGEN FERTILIZATION AND TRACER EXPERIMENT
… and unclear. A three-year N fertilization experiment with 15N double labeled 15NH415NO3 as a tracer was designed to study the effects of increasing N deposition on various N pools (including microbial communities, moss, roots, litter, and aboveground vascular plants) and how these N pools …
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Carbon dioxide induced ocean climatic change and tracer experiment with an atmosphere-ocean general circulation model
… whether or not the penetration of a passive tracer is analogous to the penetration of a greenhouse-gas-induced heating.
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Fine root dynamics and resource uptake in a South Ecuadorian mountain rainforest as dependent on elevation
… durch ein Düngungs- bzw. Austrocknungsexperiment zu testen sowie die N-Aufnahmefähigkeit von Feinwurzeln durch ein 15N-Tracer-Experiment zu erfassen und (3) mit Miniatur-Saftflusssystemen die Abhängigkeit des Wurzelsaftflusses von Umweltvariablen zu untersuchen sowie anatomische …
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Mechanisms of nutrient limitation and nutrient acquisition in managed and unmanaged forest ecosystems
… ratios and rare earth elements to serve as tracers of apatite weathering by mycorrhizal fungi in soils. In the greenhouse experiment, both of these tracers showed clear effects of biological systems (mycorrhizal and non-mycorrhizal birch seedlings) on the weathering rates of trace minerals …
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Modeling recession flow and tracking the fate and transport of nitrate and water from hillslope to stream
… of sections of hillslopes. I conducted two experiments to elucidate subsurface flow dynamics and NO⁻3 transport and retention mechanisms on a constructed experimental hillslope model. In the first experiment, I tested whether decadal pedogenetic changes in soil properties in the experimental …
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Mechanisms of Subantarctic Mode Water re-emergence in a hybrid-coordinate global GCM
… in order to reach a near-equilibrium. A tracer is then injected into the SAMW formation regions and used to track the global circulation of SAMW for a further 150 years. The upwelling regions in which SAMW is returned to the upper-ocean mixed layer are identified, and the importance of …
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AN INVESTIGATION OF SOIL WATER MOVEMENT ON DRAINED AND UNDRAINED CLAY GRASSLAND IN SOUTH WEST ENGLAND
The Rowden Moor experimental site (A.F.R.C. I.G.E.R., North Wyke) provided an opportunity to characterise discharge regimes, elucidate runoff generation mechanisms and to consider implications for solute movement under natural and drained conditions. Research was conducted on a heavy clay grassland …
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Analysis of flow patterns and flow mechanisms in soils
… flow patterns that can be visualised in dye tracer experiments. To extract quantitative information from dye tracer studies a vast variability of approaches exists. One of them is to describe dye patterns by the so called dye coverage function, i.e. the percentage of stained area per soil …
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Flow and transport processes as affected by tillage management under monsoonal conditions in South Korea
… and flow dividers as well as Brilliant Blue FCF tracer experiments. The obtained datasets were used to calibrate the process-based models HYDRUS 2/3D and EROSION 3D in order to quantify drainage water fluxes, surface runoff and erosion rates of RTpm compared to ridge tillage without coverage (RT) …