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 10 of 10 for “"warm rain"”.
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On the role of warm rain clouds in the tropics
… retrieval algorithm has been developed for warm rain clouds using Tropical Rainfall Measuring Mission (TRMM) satellite measurements. The algorithm uses TRMM Microwave Imager (TMI) brightness temperatures that have been deconvolved to the 19-GHz field-of-view (FOV) to retrieve cloud liquid …
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Trade wind cloud evolution observed by polarization radar: relationship to aerosol characteristics
… formation and the onset of precipitation in warm clouds. Although a time interval of about 20 minutes is often quoted for initiation of warm rainfall, few field observations have carefully defined the starting or ending times of trade-wind cumuli development. The goals of this research are …
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Microphysical Influences on cold pools
… melting or sublimating ice and/or evaporation of rain within the downdrafts. These cold pools can propagate outward, sometimes initiating new convection along their leading edges. Models operating at scales requiring convective parameterizations usually lack a representation of this detail, and …
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Characterization of the role of precipitation in tropical cyclone intensification
… existing within the RMW to develop the TC warm core due to limited radial responses associated with the greater inertial stability, while the latter algorithm permits characterization of the full spectrum of convection for the first time during RI episodes. It is found that the high shear …
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A numerical modeling investigation of entrainment in cumulus congestus clouds and its effects upon precipitation
… research, the factors controlling how clouds entrain environmental air are still not well understood, a problem contributing to the poor quantitative precipitation forecast skill of numerical weather prediction models and the highly sensitive precipitation biases in climate models. Inspired by a …
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Toward assessing the effects of aerosols on deep convection: a numerical study using the WRF-Chemistry model
… throughout all simulations was an inhibition in warm-rain processes due to enhanced aerosol concentrations, which resulted in a delay of precipitation onset that ranged from 2-3 minutes in WRFv3.2 runs, and up to 15 minutes in WRFv.3.0.1 runs. This result was not observed in a previous study by …
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Investigations on rainfall variability during the late Quaternary based on geochemical analyses of lake sediments from tropical and subtropical southern Africa
… influence on precipitation in this area where rainfall occurs almost exclusively during austral summer. All modern organisms were analysed for their biomarker and bulk organic and compound-specific stable carbon isotope composition. The same investigations on sediments from the modern lake …
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Hailstorm events over a maritime tropical region: a study of environments and microphysics of Surabaya hail events, Indonesia
… development, where larger values promote quicker raindrop formation and thus accelerate riming and hail growth. In these simulated pulse storms, we also learned that hail growth in this mT region is generally constrained by three mechanisms: (1) the rapid warm-rain process, which, under weaker …
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Analysis of precipitation and convection in the west Pacific during the PISTON field campaign
… insights in tropical convection in the Pacific warm pool. Chapter 2 of this dissertation provides an overview of the variability in convection observed during the PISTON cruises, and relates this variability to large-scale atmospheric conditions. Using an objective classification algorithm, …
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Assessing the impacts of microphysical and environmental controls on simulated supercell storms
… two of these hazards will be examined: supercell rainfall and supercell tornadoes, with the overarching goal to improve both our process-level understanding and forecasts of these hazards. The first part of this study focuses on supercell rainfall forecasts. Rainfall prediction by weather …