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 24 for “"lapse rate"”.
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Tropical tropospheric water vapor budget, maintenance of the lapse rate, and distribution of the extratropical tropospheric temperature and wind
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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The use of conditional and potential instability axes for severe weather forceasting
… in the lowest 300 mb and the deep-layer lapse rate (conditional instability) fields are two commonly used forecast parameters for severe weather forecasting, and the ridges of these fields, or more specifically, the ridge intersections, were hypothesized to indicate regions for enhanced …
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Engineering the Whirlwind
… in the vortex core, combined with sufficient lapse-rate divergence. Lapse-rate divergence describes a situation where the vortex core cools more slowly in rising than the surrounding atmosphere does. The height and temperature of the cold-reservoir of the heat-engine driving the vortex, are …
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Modeling Of Atmospheric Refraction Effects On Traffic Noise Propagation
… noted that this represents an approach to incorporate refraction algorithms affecting outdoor noise propagation that must also work with algorithms for geometric spreading, ground effects, diffraction, and turbulence. The new empirical model for predicting atmospheric refraction shows that wind …
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Revisiting the importance of a Southern Ocean pattern effect
… Ocean (II), creating a relatively stable lapse rate (III). While overall cloud cover shrinks, the loss of stratiform clouds is suppressed (IV) and convection is unfavorable (V) during this fast timescale. As Southern Ocean warming catches up with the rest of the globe (VI), the local …
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A lightning threat index for South Africa using numerical weather prediction data
… level layer, equivalent potential temperature lapse rate between 700 and 500 hPa and mean temperature in the 850 700 hPa layer. During summer, the same parameters were identified, except that the average relative humidity in the 3-6 km above ground level layer and equivalent potential …
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Wind and temperature in a glacierised Himalayan valley, and their controlling mechanisms
… 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 Nepalese Himalaya, which …
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Effects of atmospheric profiles on local infrasound propagation
… is weak or non-existent, however, knowing the lapse rate in low altitudes to a high degree of accuracy is necessary. An in depth discussion and analysis of these results are presented as well as an overview of the infrasound propagation model and simplified meteorological profiles used in this …
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The generation of African waves
… and vertical shears. The sub adiabatic lapse rate, however, acts to stabilize the waves. The most unstable wave supported by the jet has a wavelength of 3000 km and a period of 2.0 -2.5 days. It attains its maximum intensity at the 700 mb level, near l4°N. This compares favorably with …
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Influence of summer snowfall on discharge emanating from the Gangotri glacier
… and correlation analysis. Using a temperature lapse rate the daily average elevation for the 0 °C isotherm was calculated. This differentiated days in which snowfall events would cover a large majority of the glacier through filtering elevation. Correlation analysis was used to assess the …
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Modeling and Observing Atmospheres of Terrestrial Exoplanets
… large wind speed induced from a large negative lapse rate cools down the atmosphere much more than previously thought. Therefore, the simulated eclipse spectrum shows absorptive SiO spectral features, as opposed to emission features, that are prominent enough to be observed with JWST. However, …
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The relative importance of microclimate and land use to biodiversity
… generally decrease with elevation (known as the lapse rate). However, extremes of temperature, such as absolute maxima and minima, can also be influenced by the angle and aspect of a slope. Whilst high resolution elevation data are occasionally included in climatic models of species' …
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SOARNET, Deep Learning Thermal Detection for Free Flight
… using cloud cover and time of year and the lapse rate and dew point of the troposphere. In this paper, we present a Machine Learning based solution for assisting in forecasting thermals. We created a custom dataset using flight data recorded and uploaded to public databases by soaring …
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Stellar occultation studies of Saturn's upper atmosphere
… and density data and by studying the temperature lapse rate in the atmosphere. Our analysis is consistent with saturated gravity waves for all data sets, although gravity wave saturation is not the sole explanation for the spectra. We take advantage of the wavelength-resolved HST FOS data to study …
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The response of moist convection and the atmospheric general circulation to climate warming
… entrainment plays a role in determining the lapse rate of convecting regions of the atmosphere, and that this may explain the large increase in convective available potential energy (CAPE) with warming found in the simulations. Increases in updraft velocity are also found in the RCE …
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A comparison of spatial interpolation techniques in temperature estimation
… landscape, regional, and global models. Accurate estimates of meteorological values such as temperature, precipitation, and evapotranspiration are required for a number of landscape scale models, including those of regeneration, growth, and mortality in forest ecosystems. Given a set of …
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Tropical orographic rainfall regimes according to the tropical rainfall measuring mission
… flow, mean virtual potential temperature, lapse rate of the mean virtual potential temperature, Brunt-Väisälä Frequency, and the moist Froude number. The variables and parameters are then organized into regimes specific to each individual region of complex terrain. The Tropical Rainfall …
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Monthly mean vertical motions over the Pacific Ocean
It is the purpose of this paper to compare vertical velocity with satellite observed cloud distribution in the tropics, especially with (1) the intertropical maximum cloud band in the Northern Hemisphere paralleling the equator and about 5 degrees north of it throughout the year, (2) the occurrence …
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Climate control on plant performance across an Andean altitudinal gradient
… the altitudinal decrease of temperature (mean lapse rate: 5.2ºC/km) appear more important in determining tree growth. Insolation, which is controlled largely by cloudiness in these tropical latitudes, peaked from September to December, and was associated with a seasonal peak in tree diameter …
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Atmospheric controls on soil moisture-boundary layer interactions
… is likely when the early morning temperature lapse rate in this region is dry adiabatic; a positive feedback is likely when it is moist adiabatic; and when there is a temperature inversion in this region, deep convection cannot occur, independent of the soil moisture. Additionally, when the …
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