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 25 for “"convective available potential energy"”.
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A Temporal Examination of the Connections between Convective Available Potential Energy and Convective System Development
… development of mesoscale convection – notably, convective systems (CS) – is also largely dependent on parameters like convective available potential energy (CAPE) which the ISCCP CT Database does not record. By tying information on CAPE to CS, discoveries in convective development have been …
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Evaporative Controls on Convective Adjustment: A Satellite-Based Assessment of Convective Available Energy (CAPE) During Surface Drydowns
… interactions between the land and atmosphere. In convective atmospheres, convective available potential energy (CAPE) drives convective adjustment and can lead to precipitation. We study the evolution of CAPE during drydowns, interstorm periods over which evapotranspiration occurs, to understand …
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Internal vs. External Forcings in Supercell Interactions and Their Impact on Storm Morphology and Intensity
… initializing each simulation with an identical convective available potential energy and wind shear profile, small changes in the initial cell pair orientation lead to significant changes in subsequent storm morphology. Ninety-eight percent of the two-cell storm simulations produce stronger …
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A lightning threat index for South Africa using numerical weather prediction data
… from the following six groups of parameters; convective available potential energy, lifted index, precipitable water, equivalent potential temperature, relative humidity and air temperature. This study identifies the parameter from each of the six groups capable of predicting the occurrence of …
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High resolution numerical simulation of a nocturnal mesoscale convective system: Comparison with pecan observations
Nighttime convective storms produce a significant portion of warm season precipitation across the Great Plains region of the United States. The PECAN (Plains Elevated Convection at Night) project was designed to improve our understanding of how these storms can develop and maintain themselves in …
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Source air feeding convection within a nocturnal mesoscale convective system during the evolution from surface-based to elevated convection
… the mechanisms that allow nocturnal mesoscale convective systems (MCSs) to persist are still not well understood. On 9 August 2014 at approximately 2000 UTC, a regime of upslope flow owing to a weak shortwave impulse in the lee of the Rocky Mountains spawned a convective complex near the …
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Downdraft impacts on tropical convection
Downdrafts are an integral part of the convective cycle, and have been observed and documented for more than a hundred years. But many questions still surround convective downdrafts and their most difficult to observe properties. These questions have made the parameterization of convective …
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The role of land-atmosphere and aerosol interactions on meso-scale convective weather systems across West Africa
… and aerosol interactions on meso-scale convective systems across the sub-Saharan West Africa region, and aims at providing a value-added contribution towards better understanding of the controlling mechanisms for these interactions, in order to improve predictability of the highly …
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Thermally generated convection and precipitation over volcanoes: Numerical modelling of flow over Montserrat
… triggered by the heat source can overcome convective inhibition and force deep convection, if there is sufficient convective available potential energy. A significant increase in precipitation over the volcano covering a 4 km2 area is consistently simulated for surface temperature anomalies …
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North American monsoon precipitation and its precursors: processes at the seasonal and diurnal scale
… intensity of moisture flux convergence (MFC), convective available potential energy (CAPE) and convective inhibition (CIN), and precipitation over Mexico and the Gulf of California. Over Arizona and New Mexico, transient disturbances, like tropical waves, were more important than the diurnal …
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The response of moist convection and the atmospheric general circulation to climate warming
… are examined based on simulations of radiative-convective equilibrium (RCE) over a wide range of surface temperatures and radiosonde observations of the tropical troposphere. It is argued that cloud entrainment plays a role in determining the lapse rate of convecting regions of the atmosphere, …
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On the role of warm rain clouds in the tropics
… is also shown to influence the generation of convective available potential energy (CAPE) prior to deep convection.
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Tropical orographic rainfall regimes according to the tropical rainfall measuring mission
… thirteen variables and parameters including convective available potential energy, convective inhibition, lifting condensation level, level of free convection, 700 hPa specific humidity, total precipitable water, 1000-700 hPa layer relative humidity, 700-300 hPa layer relative humidity, …
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Dependence of continental severe convective instability on climatological environmental conditions
… convection occurs over the continents, where potential energy is stored over time in metastable vertical profiles, only to be released rapidly by severe storms. In contrast to equilibrium-state convection in tropical ocean regions, there is a relative paucity of research exploring the climate …
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Evaluating the Role of Atmospheric Stability in Generating Asymmetrical Precipitation During the Landfall of Hurricane Florence (2018)
… its slow storm motion during landfall, causing convective rainbands to produce high amounts of precipitation along the coast of North Carolina. This study focuses on the relationship between precipitation asymmetries and atmospheric stability surrounding the tropical cyclone (TC) during the …
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Characterizing and Forecasting Severe Convective Storms using Deep Learning
… avenues: the impact of climate change on severe convective storms (SCSs), and the application of deep learning (DL) for forecasting tornadic supercell environments. This research evaluated the performance of the deep learning model Pangu-Weather in forecasting tornadic environments one day in …
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Aerosol Optical Depth And Its Relationship To Radar Derived Precipitation In Mali, West Africa
… are applied so that only cases with large Convective Available Potential Energy (CAPE) and weak 0 to 6 km Above Ground Level (AGL) vertical speed shear are included in the analyzed dataset to increase the likelihood of isolated convective cells. Additionally, only cases with low Lifting …
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How does terrain influence the upscale convective growth of orographic deep moist convection?
… that some of the world’s most intense deep convective storms occur near the Sierras de Córdoba, Argentina, South America. A ground-based radar climatology during two austral spring and summer seasons (2015–2017) revealed that most of the storms were multicellular and initiated most …
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Analysis of vertical velocities and elevated instability in the comma-head of continental winter cyclones
… frontal surface to the tropopause. The stronger convective updrafts ranged from 2 to 7 m s-1 and downdrafts from -2 to -6 m s-1. The horizontal scale of the convective cells was ~5 km. The poleward zone of the comma head was characterized by deep stratiform clouds topped by cloud top generating …
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Mesoscale and stormscale ingredients of tornadic supercells producing long-track tornadoes in the 2011 Alabama super outbreak
… storm relative helicity [SRH], 0-3km SRH and convective available potential energy [CAPE] properties are compared to idealized soundings described by Adlerman and Droegemeier (2005) in an effort to identify properties conducive to storms with non-cycling (sustained) mesocyclones. 200m …
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