This thesis consists of nine chapters. Chapter 1 and 2 contain a brief review of the cloud physics of particle size distributions and of the microstructure of rain. A comprehensive review of the author's knowledge on raindrop size distributions in the literature is given in chapter 3 and 4. Chapter 3 focuses the attention on the different DSD parameterizations and on their applications to different climatic settings; therefore it regards a knowledge gained trough observations. Chapter 4 provides a summary of theoretical studies on raindrops size distributions and aims at understanding the physics in relationship with the DSD. In chapter 5 a detailed description of the JW, Pludix, DBS, 2DVD and Parsivel disdrometers used in this work is presented. The characterization of raindrop size distributions in Ferrara using a JW disdrometer and the reconsideration of the DSD analysis methods are performed in chapter 6. In chapter 7 the results of the intercomparison among the JW disdrometer and Pludix in Ferrara are presented. Chapter 8 illustrates the results of the intercomparison among the four disdrometers in Iowa and of the proposed correction algorithms for each instrument. Observations of raindrop size distribution in a stratiform cloud with the S-band wind profiler and a surface disdrometer in Iowa are presented in chapter 9. Finally there is a summary and a discussion of all the obtained results.
Reconsideration of the analysis methods and measuring instruments for the raindrops size distributions investigation
CARACCIOLO, Clelia
2004
Abstract
This thesis consists of nine chapters. Chapter 1 and 2 contain a brief review of the cloud physics of particle size distributions and of the microstructure of rain. A comprehensive review of the author's knowledge on raindrop size distributions in the literature is given in chapter 3 and 4. Chapter 3 focuses the attention on the different DSD parameterizations and on their applications to different climatic settings; therefore it regards a knowledge gained trough observations. Chapter 4 provides a summary of theoretical studies on raindrops size distributions and aims at understanding the physics in relationship with the DSD. In chapter 5 a detailed description of the JW, Pludix, DBS, 2DVD and Parsivel disdrometers used in this work is presented. The characterization of raindrop size distributions in Ferrara using a JW disdrometer and the reconsideration of the DSD analysis methods are performed in chapter 6. In chapter 7 the results of the intercomparison among the JW disdrometer and Pludix in Ferrara are presented. Chapter 8 illustrates the results of the intercomparison among the four disdrometers in Iowa and of the proposed correction algorithms for each instrument. Observations of raindrop size distribution in a stratiform cloud with the S-band wind profiler and a surface disdrometer in Iowa are presented in chapter 9. Finally there is a summary and a discussion of all the obtained results.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
