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    Application of Scaling in Radar Reflectivity for Correcting Range-Dependent Bias in Climatological Radar Rainfall Estimates

    Source: Journal of Atmospheric and Oceanic Technology:;2004:;volume( 021 ):;issue: 010::page 1545
    Author:
    Chumchean, Siriluk
    ,
    Seed, Alan
    ,
    Sharma, Ashish
    DOI: 10.1175/1520-0426(2004)021<1545:AOSIRR>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: This paper presents a method to correct for the range-dependent bias in radar reflectivity that is a result of partial beam filling and of the increase in observation volume with range. The scaling behavior of reflectivity fields as a function of range from the radar was explored in this study. It was found that a simple scaling paradigm was applicable, and a scale transformation function was proposed to ensure uniformity in the probability distributions of reflectivity at both near and far range. The scaling exponents of the power-law transformation function were estimated using a 6-month sequence of reflectivity maps in a Cartesian grid and two sets of instantaneous reflectivity maps in polar coordinates from 1° C-band and 1.6° S-band radars at Sydney, Australia. The averaging process that transforms the instantaneous polar reflectivity into the hourly Cartesian grid data leads to a lower scaling exponent of the hourly Cartesian reflectivity data compared with the instantaneous plan precipitation indicator (PPI) polar data. The scaling exponents for the hourly Cartesian case, the instantaneous polar case using the 1° C-band radar, and the instantaneous polar case using the 1.6° S-band radar data were estimated as 0.024, 0.10, and 0.22, respectively.
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      Application of Scaling in Radar Reflectivity for Correcting Range-Dependent Bias in Climatological Radar Rainfall Estimates

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4160301
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    contributor authorChumchean, Siriluk
    contributor authorSeed, Alan
    contributor authorSharma, Ashish
    date accessioned2017-06-09T14:39:18Z
    date available2017-06-09T14:39:18Z
    date copyright2004/10/01
    date issued2004
    identifier issn0739-0572
    identifier otherams-2371.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4160301
    description abstractThis paper presents a method to correct for the range-dependent bias in radar reflectivity that is a result of partial beam filling and of the increase in observation volume with range. The scaling behavior of reflectivity fields as a function of range from the radar was explored in this study. It was found that a simple scaling paradigm was applicable, and a scale transformation function was proposed to ensure uniformity in the probability distributions of reflectivity at both near and far range. The scaling exponents of the power-law transformation function were estimated using a 6-month sequence of reflectivity maps in a Cartesian grid and two sets of instantaneous reflectivity maps in polar coordinates from 1° C-band and 1.6° S-band radars at Sydney, Australia. The averaging process that transforms the instantaneous polar reflectivity into the hourly Cartesian grid data leads to a lower scaling exponent of the hourly Cartesian reflectivity data compared with the instantaneous plan precipitation indicator (PPI) polar data. The scaling exponents for the hourly Cartesian case, the instantaneous polar case using the 1° C-band radar, and the instantaneous polar case using the 1.6° S-band radar data were estimated as 0.024, 0.10, and 0.22, respectively.
    publisherAmerican Meteorological Society
    titleApplication of Scaling in Radar Reflectivity for Correcting Range-Dependent Bias in Climatological Radar Rainfall Estimates
    typeJournal Paper
    journal volume21
    journal issue10
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/1520-0426(2004)021<1545:AOSIRR>2.0.CO;2
    journal fristpage1545
    journal lastpage1556
    treeJournal of Atmospheric and Oceanic Technology:;2004:;volume( 021 ):;issue: 010
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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