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 20 of 64 for “"Surface wind"”.
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Modelling of the near-surface wind speed
Das Wissen über die oberflächennahe Windgeschwindigkeit und deren Vorhersage ist von größtem Interesse für eine Vielzahl von Anwendungen, einschließlich der Windenergie. Für die vorliegende Arbeit wurden folgende Aspekte untersucht: i) die Variabilität des Windes in der Vergangenheit über …
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Assessment of High-Resolution Simulation in Reproducing Surface Wind over Alps
… of this study is to statistically evaluate the surface wind speed simulated over Alps by the ICON high-resolution climate model. SYNOP observation is the reference of the simulated data. The evaluation is focusing on the perspectives of wind speed and wind directions. The analysis shows the …
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The influence of thunderstorm type on extreme near-surface wind characteristics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Non-thunderstorm-related effects on the near-surface wind field in strong tornadoes
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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An Improved Microwave Radiative Transfer Model For Ocean Emissivity At Hurricane Force Surface Wind Speed
… the microwave blackbody emission from the ocean surface under the forcing of strong surface winds in hurricanes is being developed. This ocean emissivity model will be incorporated into a larger radiative transfer model used to infer ocean surface wind speed and rain rate in hurricanes from …
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An Ocean Surface Wind Vector Model Function For A Spaceborne Microwave Radiometer And Its Application
Ocean surface wind vectors over the ocean present vital information for scientists and forecasters in their attempt to understand the Earth's global weather and climate. As the demand for global wind velocity information has increased, the number of satellite missions that carry wind-measuring …
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The Association of Strong Near-Surface Wind Shear Profiles with Enhanced Probabilities of Significant Severe Weather and Tornado Events.
… tornado days, a distinct combination of near surface (< 1 km AGL) speed and directional shear has been noted in pre-tornadic vertical wind profiles. This combination consists of intense speed shear followed by intense directional shear between the surface and 1 km AGL, which appears as a …
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The trend of wind speed over the United States during 1998 - 2011
… U.S., we identified a decreasing trend near the surface and an increasing trend at the upper levels, which is consistent with previous studies. The decreasing trend of near-surface wind speed is statistically significant (p<0.01). However, the statistical significance of the decreasing trend …
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Near-surface tornado wind field estimation using damage patterns
… are considered the most violent and dangerous wind hazards and are emerging as a major public concern, causing a significant amount of property loss and casualties in the past decades. In response, the engineering community in the United States is implementing tornado-based design in codes and …
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Hurricane Wind Speed And Rain Rate Retrieval Algorithm For The Stepped Frequency Microwave Radiometer
… Algorithm (HIRA) for the measurement of oceanic surface wind speed and rain rate in hurricanes. The HIRA is designed to process airborne microwave brightness temperatures from the NOAA, Stepped Frequency Microwave Radiometer (SFMR), which routinely collects data during NOAA hurricane hunter …
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Comparison study of SEASAT scatterometer and conventional wind fields
A demonstrated need exists for better wind field information over the open ocean, especially as a forcing function for ocean circulation models. Microwave scatterometry, as a means of remotely sensing surface wind information, developed in response to this requirement for a surface wind field with …
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Feasibility of using cloud top altimetry for estimating tropical cyclone intensity estimation
… His theory aims to calculate the peak surface wind speed in hurricanes using only three parameters, all of which can be collected from satellite imagery: cloud top height, sea surface temperature and cloud top temperature. Cloud top heights for selected hurricanes were obtained from the …
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Evaluating the trend and impact factors of Southeast Asian monsoon
… the south of China shows a decreasing trend. The surface wind analysis shows that surface southwesterly is weakening in the Northern Hemisphere, so the north of Mainland SEA receives less moisture, but also allow more moisture from the South China Sea to access the south of Mainland SEA. The …
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Towards Improved Estimates of Upper Ocean Energetics
… this energy exchange is through the use of “wind work,” or the work done on the ocean by the wind. Since wind work is calculated according to the interaction between ocean surface currents and surface wind stress, a number of surface current decompositions can be used to decompose wind work …
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Ensemble forecasting in the Mediterranean sea
… ocean forecasting using distributions of the surface wind field derived from a Bayesian Hierarchical Model (BHM). The ocean members are forced with samples from the posterior distribution of the wind during the assimilation of satellite and in-situ ocean data. The initial condition …
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Hurricane Wind Retrieval Algorithm Development For An Airborne Conical Scanning Scatterometer
Reliable ocean wind vector measurements can be obtained using active microwave remote sensing (scatterometry) techniques. With the increase in the number of severe hurricanes making landfall in the United States, there is increased emphasis on operational monitoring of hurricane winds from …
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Seawinds Radiometer Brightness Temperature Calibration And Validation
The NASA SeaWinds scatterometer is a radar remote sensor which operates on two satellites; NASA's QuikSCAT launched in June 1999 and on Japan's ADEOS-II satellite launched in December 2002. The purpose of SeaWinds is to provide global measurements of the ocean surface wind vector. On QuikSCAT, a …
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An Analysis of SeaWinds Simultaneous Wind/Rain Retrieval in Severe Weather Events
Scatterometers, such as SeaWinds, can provide wide coverage of ocean surface winds. They estimate near-surface wind vectors by relating measured radar backscatter to a geophysical model function. However, SeaWinds measurements are also sensitive to rain, and conventional wind retrieval degrades in …
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Arabian Sea mixed layer deepening during the monsoon : observations and dynamics
… Sea. The winter northeast monsoon has moderate wind forcing and a strongly destabilizing surface buoyancy flux, driven by large radiative and latent heat losses at the sea surface. Convective entrainment is the primary local mechanism driving the observed mixed layer cooling and deepening, …
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A Climatology of High-Wind Events Associated with Post-Tropical Cyclones in the United States
… the capability of producing hurricane-force winds and gusts for portions of the eastern United States. This study provides a climatological foundation for high-wind observations that were contributed from PTCs. In this study, 76 PTC systems were identified and tracked using six hourly …
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