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 10 of 10 for “"turbulent flux"”.
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Effects of boundary roughness on turbulence in uniform open channel flow
… is 17m long and sufficient for a fully developed turbulent flow. The aim was to achieve conditions that can be defined as smooth, transitional, and fully rough. The LDV system is capable of measuring the velocity of a fluid with a very small measuring volume and a high sampling rate. Due to the …
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Advection at a forest site – an updated approach
… budget in addition to the commonly measured turbulent flux and storage flux. Direct advection measurements are challenging because of the instrumental accuracy required to observe small concentration gradients and small wind velocities and because of the spatio-temporal measurement resolution …
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A zonally and annually averaged study of potential early Martian atmospheres
… and small-scale (convective) eddies, and surface turbulent flux. I present annually-averaged results for an examination of potential atmospheres of early Mars, given that its carbon dioxide level may range from 0 to 500 Pa and the orbital obliquity from 0$\sp\circ$ to 50$\sp\circ.$ These results …
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Study of the atmospheric boundary layer processes over sloping terrain covered by sparse canopy
… spatial scales influencing the properties of the turbulent fluxes. Both experimental and modelling approaches characterize the study methodology. Measurements are first performed in laboratory in order to calibrate flux sensors (i.e., ultrasonic anemometers), and subsequently into three N-W Italy …
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Shear enhanced nutrient supply at the Mesoscale
… mesoscale features leads to locally enhanced turbulent mixing and a shear-enhanced nutrient supply. Measurements of turbulent diffusivity and nutrient concentrations have been made in a region containing an eddy dipole, a strong mesoscale feature, consisting of a cyclonic eddy and an …
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Site-specific modelling of turbulent fluxes on the Tibetan Plateau
… but such attempts require surface-specific flux data of high quality for validation. Eddy-covariance measurements are qualified for this task, but these are scarce on the Tibetan Plateau, incomplete due to quality filtering and potentially biased due to the well-known closure gap of the …
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Studies of premixed turbulent flames under flamelet assumptions
Turbulent burning velocity is a crucial factor in describing how fast premixed flame can burn, while it is still not well-predictable under various turbulence levels and flame conditions. A clearer definition of turbulent burning velocity based on the reaction rate will help understand the …
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Impacts of ENSO on coastal South African sea surface temperatures
… seem to be caused by anomalous surface turbulent flux of latent and sensible heat and abnormal wind speed and direction. This study opens the possibility of seasonal forecasting of SST in the South Benguela upwelling system because of the positive lag correlation between ENSO and SST …
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On the role of the Agulhas Current on weather and climate of South Africa
… with the surrounding ocean, leading to a large turbulent flux of moisture from ocean to atmosphere (also called the turbulent latent heat flux). The dynamics of ocean-atmosphere interaction above the Agulhas Current and its impact on the weather and climate of Southern Africa are not well known. …
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Measurement quality in data products for meteorology and climate
L'abstract è presente nell'allegato / the abstract is in the attachment