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 15 of 15 for “"convective clouds"”.
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Band to Band Calibration and Relative Gain Analysis of Satellite Sensors Using Deep Convective Clouds
… bands of Landsat 8 using SCIAMACHY Deep Convective Cloud (DCC) spectra. Second, a novel method to derive relative gains using DCCs and improve the image quality of cirrus band scenes was developed. DCCs are very cold, bright clouds located in the tropopause layer. At small sun elevation …
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Analysis Of A Parallel Stratiform Mesoscale Convective System During The Midlatitude Continental Convective Clouds Experiment
<p>During the Midlatitude Continental Convective Clouds Experiment, a PS MCS traversed north-central Oklahoma on 11 May 2011. In-situ measurements of the stratiform precipitation region were obtained from six horizontal flight legs flow by the University of North Dakota Citation II Weather Research …
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Using high-resolution modelling to improve the parameterisation of convection in a climate model
… causing and influencing the development of moist convective clouds. Through this work a 1D cloud-model was derived from first principles to represent the vertical profile of individual convective clouds. A microphysics framework was implemented to ensure identical behaviour in LES and cloud-model …
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Rain Formation in Shallow Tropical Convection
… that the process of rain formation in warm convective clouds is simple and efficient, provided that giant and ultragiant CCN are present near cloud base. While more complex processes leading to drop spectra broadening, such as mixing, and stochastic condensation most likely also occur in …
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Characterization of Tropical Clouds Using Multi-Satellite Observations
<p>Clouds an important component of the earth-climate system and play a critical role in affecting energy and water cycle of the planet. In particular, tropical convective clouds account for the majority of the precipitation that fall on the Earth's surface. Multiple active satellite missions in …
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Aerosol-Cloud interactions : a new perspective in precipitation enhancement
… This has affected the structure and evolution of clouds, and precipitation from them. The processes and mechanisms by which clouds and precipitation are modified by changes in aerosol composition and size-distribution are very intricate. The objective of this thesis is to improve the understanding …
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A Numerical Study of the Structure and Vertical Transport Properties of A Tropical Convective System
… statistical properties and formation of convective clouds. In the tropics, large-scale lifting is predominantly due to the destablizing effect of large-scale lifting. Thus, a prescribed large-scale lifting is imposed continuously in the model. In order to initiate clouds, small amplitude …
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Investigation of the positive interaction between the primary and secondary circulation and the roles of different types of precipitation in tropical cyclone formation
… within 36 h before genesis. Stratiform clouds, mid-level convection, and deep convection increase individually and all thereby contribute to the increasing precipitation. The contribution by stratiform precipitation is due to its increasing areal coverage, while its pixel rain rate …
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Determining Best Method For Estimating Observed Level Of Maximum Convective Detrainment Based On Radar Reflectivity
<p>Convective mass transport is the transport of mass from near the surface up to the upper troposphere and lower stratosphere (UTLS) by a deep convective updraft. This transport can alter the chemical makeup and water vapor balance of the UTLS, which can affect cloud formation and the radiative …
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Lightning/percipitation relationships on a global basis
… scale when less than 6% of all precipitating clouds exhibit lightning. For precipitating clouds over land, lightning appears in 15% of the clouds at 2 km altitude. Lightning may be better suited for measuring rainfall over land. The mass of precipitation[kg] per lightning flash was found to be …
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Convective cloud and rainfall processes over the Maritime Continent : simulation and analysis of the diurnal cycle
… In particular, this work improves simulations of convective-radiative feedbacks and the role of cumulus clouds in mediating the diurnal cycle of rainfall. Three key contributions are made to the development of RegCM3-IBIS. Two pieces of work relate directly to the formation and dissipation of …
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Development of an accurate 3D Monte Carlo broadband atmospheric radiative transfer model
… the earth and atmosphere is redistributed by clouds in one of their most important roles in the atmosphere. Without accurately representing these interactions we greatly decrease our ability to successfully predict climate change, weather patterns, and to observe our environment from space. …
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Microphysical Influences on cold pools
Downdrafts extending from within convective clouds to the ground can produce cold pools, regions of air at the surface cooled by melting or sublimating ice and/or evaporation of rain within the downdrafts. These cold pools can propagate outward, sometimes initiating new convection along their …
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Simulating organization of convective cloud fields and interactions with the surface
The mesoscale organization and structure of convective clouds is thought to be rooted in the thermodynamic properties of the atmosphere and in the turbulent to mesoscale dynamics of the flow. Such structure may contribute to the transition between shallow and deep convection. The thermodynamic …
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Observation and simulation of mid-latitude ice clouds
… determine the minimum enclosing sphere. The ice clouds in various weather systems from polar to equator have been sampled using aircraft equipped with in-situ probes in the past several decades and plenty of datasets are available, thus the comparison of observed and modeled PSDs using the …