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 11 of 11 for “"elevated convection"”.
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Manifestation of elevated convection within wintertime extratropical cyclones during impacts
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Source air feeding convection within a nocturnal mesoscale convective system during the evolution from surface-based to elevated convection
Although nocturnal convection is frequently observed, 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 …
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The influence of environmental conditions and cold pool generation on surface-based vs. elevated convection in a nocturnal mesoscale convective system
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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Structure of an east coast cyclone derived from airborne radar and model diagnostics
… of the WRF modeled potentially unstable layers. Elevated convection observed near cloud top exhibited updrafts of 2 to 3.5 m s-1 and was often located within layers of WRF modeled potential instability. Beneath the elevated convection were many enhanced reflectivity fall streaks that were shaped …
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High resolution numerical simulation of a nocturnal mesoscale convective system: Comparison with pecan observations
… 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 the absence of traditional sources of CAPE (Convective Available Potential Energy). This thesis focuses on the …
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Analysis of vertical velocities and elevated instability in the comma-head of continental winter cyclones
The vertical motion and physical structure of elevated convection and generating cells within the comma heads of three continental winter cyclones are investigated using the Wyoming W-band Cloud Radar mounted on the NSF/NCAR C-130, supplemented by analyses from the Rapid Update Cycle model and …
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Surface layer processes and nocturnal low-level jet development--an observational study during PECAN
… School participated in the 2015 Plains Elevated Convection at Night (PECAN) research project and collected high-resolution stable boundary layer data as it evolved through the night. The objective of this study was to use this dataset to identify the impact of LLJ presence on surface …
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Idealized modeling of the role of stability and shear on mesoscale gravity wave evolution
… in summer or over warm frontal surfaces behind elevated convection in winter. MGWs are associated with damaging winds, moderate to heavy precipitation, and occasional heat bursts at the surface. The forcing mechanism for MGWs in this study is hypothesized to be evaporative cooling occurring …
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A recent spatial, temporal, and meteorological climatology of thundersnow across the contiguous United States
… thundersnow reports supported previous findings: elevated convection within winter storms is driven by strong frontogenetic forcing, a deep moist layer with wind shear, and occasionally, negative equivalent potential vorticity.
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An investigation of the development of supercells in the Indiana and Ohio tornado outbreak of 24 August 2016 using a WRF model simulation
… impacted portions of Indiana and Ohio. Initially elevated multicellular convection transitioned to surface-based supercells between 1700 and 1830 UTC, after which time tornadoes began to occur. Such a transition is of particular interest owing to its relatively rare occurrence and because most …
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Observed microphysical characteristics and inferred thermodynamic processes contributing to the structure, evolution, and maintenance of nocturnal elevated mesoscale convective systems
During the 2015 Plains Elevated Convection at Night (PECAN) project, airborne radar and optical array probe data were collected within 42 spiral ascents/descents of the NOAA P-3 aircraft across various regions of six mesoscale convective systems (MCSs) at multiple stages of system development. …