Title page for 91621014


[Back to Results | New Search]

Student Number 91621014
Author Shun-Hua Wu(吳舜華)
Author's Email Address No Public.
Statistics This thesis had been viewed 1702 times. Download 607 times.
Department Graduate Institute of Atmospheric Physics
Year 2005
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Use distrometer analyze different precipitation type
Date of Defense 2004-07-09
Page Count 100
Keyword
  • distrometer
  • Abstract Measurements of the drop size distribution(DSD) have a broad range of applications in meteorology and hydrology.
    The characteristics of an averaged DSD,which represents a precipitation type in a climatological region,are important for cloud-modeling studies.
       The observations were designed to test how accurately they measure drop size distribution by Impact(JWD) and Optical(2DVD) disdrometers.The comparison of DSDs,raindrop in 1.5〜2.5mm showed good agreement between two types of disdrometers.
    The Joss-Waldvogel disdrometer underestimate small drop size in weak rainfall rate, and underestimate small and big drop size in strong rainfall rate.Beside,the Gamma parameter distribution also showed good agreement between two types of disdrometers.
    Further more, apply A long-period and copious data observed by Optical disdrometer(2DVD) to analyze the precipitation characteristics during different season and different precipitation type. In different season analysis, D0 value in each season varies with rainrate, and the distribution of D0 value from large to small is winter,spring,typhoon, fall ,meiyu season.
    In analysis of different precipitation type, the D0 value of the fronal type and typhoonic type is apparent small than the local precipipation type when R>20mm/hr.It might result from the drop broken easily and evolved hardly when it is in strong rainrate affected by the frontal system or typhoon. Local precipipation type usually have big drop size distribution.
    In the same precipipation type analysis of different season,we found:(1)The local precipipation type: the DSD in winter is similar with spring. The DSD in meiyu season is similar with typhoon season. The DSD in fall is between winter and meiyu season. (2)The DSD of front precipipation type is seasonal dependent. The distribution of D0 value from large to small is : winter〜spring>meiyu>fall(3)The DSD of typhoon precipipation seems seasonal independent.
    Table of Content 目錄
    中文摘要………………………………………………………………Ⅰ
    英文摘要………………………………………………………………Ⅲ
    致謝……………………………………………………………………Ⅴ
    目錄……………………………………………………………………Ⅵ
    圖表說明………………………………………………………………Ⅷ
    第一章:緒論……………………………………………………………1
        1.1:研究動機…………………………………………………1
        1.2:文獻回顧…………………………………………………2
        1.3:研究方向…………………………………………………5
    第二章:資料來源與分析方法…………………………………………6
        2.1:資料來源…………………………………………………6
        2.2:儀器觀測原理與簡介……………………………………6
        2.3:雨滴粒徑分布的計算……………………………………7
        2.4:Gamma分布之計算………………………………………9
        2.5:Z-R關係式之A、b係數之推導………………………12
    第三章:撞擊式與光學式雨滴譜儀之比較……………………………14
        3.1:初步之比對…………………………………………… 14
        3.2:雨滴粒徑分布之特性…………………………………15
        3.3:Gamma參數與降雨參數之比較…………………………17
    第四章:降雨特性統計與分析…………………………………………19
        4.1:不同降雨率之降雨特性………………………………19
        4.2:不同季節之降雨特性…………………………………20
        4.3:不同降雨型態之降雨特性……………………………22
        4.4:相同降雨型態之季節差異性…………………………23
    第五章:結論與未來展望……………………………………………28
        5.1:結論……………………………………………………28
        5.2:未來展望………………………………………………31
    參考文獻………………………………………………………………32
    附圖……………………………………………………………………34
    表………………………………………………………………………83
    附錄……………………………………………………………………93
    Reference 張偉裕,2002:利用雨滴譜儀分析雨滴粒徑分布(納莉颱風個案), 國立中央大學碩士論文,95頁
    林位總,2004:利用二維雨滴譜儀研究雨滴譜特性, 國立中央大學碩士論文,89頁
    Atlas, D., and C. W. Ulbrich. 1977:Path- and Area-Integrated Rainfall Measurement by Microwave Attenuation in the 1-3cm Band. J. Appl. Meteor., 16, 1322-1331.
    Chen C. S., and Y. L. Chen, 2003:The Rainfall Characteristics of Taiwan. Mon. Wea. Rev., 131,1323-1341.
    Ferrier, B. S., W.-K. Tao, and J. Simpson, 1995: A
      Double-moment Multiple-phase Four-Class Bulk Ice Scheme.
      PartⅡ:Simulations of convective Storms in Different Large-
    Scale Environments and Comparisons with other Bulk
    Parameterizations. J. Atmos. Sci., 52, 1001-1033.
    Kozu, T., and K. Nakamura, 1991:Rainfall Parameter estimation from dual-radar measurements combining reflectivity profile and path-integrated attenuation. J.Atmos. Oceanic Technol., 8, 59-271.
    Marshall, J. S., and W. M. K. Palmer, 1948:The Distribution of raindrop with Size. J. Meteor., 5, 165-166.
    Martin L. Mang, and J. Joss, 2000:An optical Distrometer for Measuring Size and Velocity of Hydrometeors. J. Atmos. Oceanic Technol., 17, 130-139.
    Sheppard B. E.,1989:Effect of Irregularities in the Diameter
    Classification of Raindrops by the Joss-Waldvogel Distrometer. J. Atmos. Oceanic Technol., 7,180-183.
    Tokay, A., and D. A. Short, 1996:Evidence from Topical Raindrop Spectra of the Origin of Rain from Stratiform versus Convection clouds. J. Appl. Metero. Sci., 35, 355-371.
    Tokay , A., A. Kruger, and W. F. Krajewski,2001:Comparison of drop size distribution measurements by impact and optical distrometers. J. Appl. Meteor., 40, 2083-2097.
    Ulbrich, C. W.,and D. Atlas,1983:Nature Variations in the Analytical Form of the Raindrop Size Distribution. J. Climate Meteor.Appl.,22,1764-1774.
    Ulbrich, C. W.,and D. Atlas,1984:Assessment of the contribution of differential polarization to improved rainfall measurement. Radio Sci.,19,49-57.
    Ulbrich, C. W.,1985:The Effects of Drop Size Distribution Truncation on Rainfall integer Parameter and Empirical Relations. J. Climate Appl. Meteor.,24,580-590.
    Advisor
  • Pay-Laim Lin(林沛練)
  • Files
  • 91621014.pdf
  • approve immediately
    Date of Submission 2006-07-10

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have dissertation-related questions, please contact with the NCU library extension service section.
    Our service phone is (03)422-7151 Ext. 57407,E-mail is also welcomed.