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 11 of 11 for “"carbon dioxide fluxes"”.
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Wood and soil-atmosphere carbon dioxide fluxes from a tropical forest ecosystem
<p>Carbon cycling in tropical rainforests is an important component of the global carbon budget. A better understanding of controlling mechanisms and magnitude of CO2 sources from tropical forests will improve our ability to predict future impacts of climate changes. The research presented in this …
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An Assessment of Radiative, Energy and Carbon Dioxide Fluxes over Three Urban Locations in Dublin
… exchanges of radiation, turbulent heat and carbon dioxide. To date very few measurements of these exchanges are undertaken in the urban domain despite the growing number of urban dwellers worldwide. This thesis presents the first attempt at investigating these exchanges over an urban surface …
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The Effect of Prescribed Burning on Soil Microbial Communities, Nutrients, and Carbon Dioxide Fluxes Under and Between Sagebrush Canopies in the Semi-Arid Rangelands of Northern Nevada
… microbial communities, nutrient dynamics, and carbon dioxide (CO2) fluxes. These changes can have direct and indirect effects on soil biochemistry and respiration. The effects of fire on soil largely depend on time and seasonality, frequency, severity, and management practices pre-and-post …
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Summertime Carbon Dioxide Exchange over a Subarctic Sedge Wetland
<p>Measurements of net ecosystem carbon dioxide fluxes were made over a sedge fen, Churchill, Manitoba during the summertime period, 1994. This period, when compared to 50 year records (1943 to 1993), was warm and dry. The mean daily temperature was 2 "C warmer than normal. Total precipitation for …
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SIMPLE ORGANIC FERTILIZER AMENDMENTS FOR FARMING IN DEGRADED SOILS: EFFECTS ON PLANT-MICROBE INTERACTIONS
… soil water holding capacity, soil microbial carbon, microbial biomass carbon, and soil carbon dioxide fluxes were all hypothesized to respond significantly to applications of any of the treatments. The use of worm castings as a whole resulted in the most significant effects on plant …
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Water resources planning and climate change adaptation strategies of Sardinian basins under water-limited conditions
… slopes. Measurements of land surface energy fluxes, carbon dioxide fluxes, soil moisture, and tree transpiration highlight different ecohydrological behaviors: at Orroli, evapotranspiration (ET) closely follows seasonal rainfall patterns and vegetation dynamics, whereas at Marganai, ET …
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Investigation of temperature effects on subsurface attenuation of nitroaromatic compounds
… production facility in New Jersey. Elevated carbon dioxide fluxes and depleted ¹⁴C content were observed in the contaminated area compared to a background area, indicating that anthropogenic organic contaminants were degrading under natural site conditions. Recent research at Colorado State …
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Heat transfer, evaporation and carbon dioxide transfer in soil
… energy balance. Soil water evaporation and soil carbon dioxide (CO2) fluxes both involve soil gas transport processes and properties, and both impact the soil environment and physical, chemical, and biological processes occurring in the soil. Accurate and dynamic measurements of soil water …
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Environmental tradeoffs of denitrifying woodchip bioreactors
… The production of greenhouse gases like carbon dioxide, nitrous oxide and methane are one concern. Unintended increases in these gases in bioreactors would effectively trade one problem for another with equally deleterious effects on the environment. This study is an examination of the …
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Transport Processes of Reactive Trace Gases in the Atmospheric Boundary Layer
… and consequently in ecosystem budgets of carbon and nitrogen (among many more). For a correct quantification of the exchange between surface and atmosphere, it is crucial to understand the transport processes involved and to determine limitations of the presently available measurement …
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Innovative sustainable approaches for managing the soil and water resources in mediterranean agricultural context [Approcci innovativi e sostenibili per la gestione delle risorse del suolo e delle acque nel contesto agricolo mediterraneo]
… delle stesse, e analisi dei flussi di anidride carbonica (CO2) dal suolo a diverse scale spaziali. In particolare, per l'analisi dei flussi di CO2 dal suolo, è stata appositamente utilizzata una camera di accumulo a basso costo ed i flussi di CO2 misurati con la tecnica Eddy Covariance sono …