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.
Results
Showing 1 to 13 of 13 for “"Near-surface Wind"”.
-
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 …
-
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
-
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
-
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 …
-
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 …
-
The trend of wind speed over the United States during 1998 - 2011
… over the 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 …
-
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 …
-
On the role of high frequency waves in ocean altimetry
… the goals are to refine satellite retrieval of wind, wind stress, and sea level using a microwave radar altimeter. The data were collected from a low-flying aircraft using a sensor suite designed to measure the surface waves, radar backscatter, the atmospheric flow, and turbulent fluxes within …
-
Tropical cyclone size in observations and in radiative-convective equilibrium
… in the damage caused by tropical cyclones due to wind, storm surge, and inland freshwater flooding. This work explores size, defined as the radius of vanishing wind, in observations and at equilibrium in an idealized numerical model. First, a climatology of size is created from the QuikSCAT …
-
A New Method for Melt Detection on Antarctic Ice-Shelves and Scatterometer Calibration Verification
… radar backscatter measurements from the SeaWinds on QuikScat scatterometer and microwave radiometer measurements from the Special Sensor Microwave/Imager (SSM/I) are used to determine periods of surface melt and freeze in the Antarctic ice-shelves. The normalized radar backscatter (sigma-0) …
-
Trade wind cloud evolution observed by polarization radar: relationship to aerosol characteristics
… defined the starting or ending times of trade-wind cumuli development. The goals of this research are to: 1) investigate the characteristic time and height of warm rain formation in trade-wind cumulus using radar and 2) determine the sensitivity of precipitation development in shallow maritime …
-
Wind and temperature in a glacierised Himalayan valley, and their controlling mechanisms
… melt and precipitation, such as the local valley wind regimes and the lapse rates of near-surface temperatures, are poorly understood in the HKKH. This thesis aims to improve understanding of the valley wind regime and temperature lapse rate for the glacierised Dudh Koshi River Basin in the …
-
Hydrometeorological Variability over Pakistan
… drought, rain, hail, snow, lightning, fog, wind, temperature extremes, air pollution, and climatic change. However, three of the most pressing challenges in terms of water resource availability, that are different in nature, but are inter-linked to each other are discussed over here. We …