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    Multipass Objective Analyses of Doppler Radar Data

    Source: Journal of Atmospheric and Oceanic Technology:;2008:;volume( 025 ):;issue: 010::page 1845
    Author:
    Majcen, Mario
    ,
    Markowski, Paul
    ,
    Richardson, Yvette
    ,
    Dowell, David
    ,
    Wurman, Joshua
    DOI: 10.1175/2008JTECHA1089.1
    Publisher: American Meteorological Society
    Abstract: This note assesses the improvements in dual-Doppler wind syntheses by employing a multipass Barnes objective analysis in the interpolation of radial velocities to a Cartesian grid, as opposed to a more typical single-pass Barnes objective analysis. Steeper response functions can be obtained by multipass objective analyses; that is, multipass objective analyses are less damping at well-resolved wavelengths (e.g., 8?20?, where ? is the data spacing) than single-pass objective analyses, while still suppressing small-scale (<4?) noise. Synthetic dual-Doppler data were generated from a three-dimensional numerical simulation of a supercell thunderstorm in a way that emulates the data collection by two mobile radars. The synthetic radial velocity data from a pair of simulated radars were objectively analyzed to a grid, after which the three-dimensional wind field was retrieved by iteratively computing the horizontal divergence and integrating the anelastic mass continuity equation. Experiments with two passes and three passes of the Barnes filter were performed, in addition to a single-pass objective analysis. Comparison of the analyzed three-dimensional wind fields to the model wind fields suggests that multipass objective analysis of radial velocity data prior to dual-Doppler wind synthesis is probably worth the added computational cost. The improvements in the wind syntheses derived from multipass objective analyses are even more apparent for higher-order fields such as vorticity and divergence, and for trajectory calculations and pressure/buoyancy retrievals.
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      Multipass Objective Analyses of Doppler Radar Data

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4209116
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    contributor authorMajcen, Mario
    contributor authorMarkowski, Paul
    contributor authorRichardson, Yvette
    contributor authorDowell, David
    contributor authorWurman, Joshua
    date accessioned2017-06-09T16:25:33Z
    date available2017-06-09T16:25:33Z
    date copyright2008/10/01
    date issued2008
    identifier issn0739-0572
    identifier otherams-67646.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4209116
    description abstractThis note assesses the improvements in dual-Doppler wind syntheses by employing a multipass Barnes objective analysis in the interpolation of radial velocities to a Cartesian grid, as opposed to a more typical single-pass Barnes objective analysis. Steeper response functions can be obtained by multipass objective analyses; that is, multipass objective analyses are less damping at well-resolved wavelengths (e.g., 8?20?, where ? is the data spacing) than single-pass objective analyses, while still suppressing small-scale (<4?) noise. Synthetic dual-Doppler data were generated from a three-dimensional numerical simulation of a supercell thunderstorm in a way that emulates the data collection by two mobile radars. The synthetic radial velocity data from a pair of simulated radars were objectively analyzed to a grid, after which the three-dimensional wind field was retrieved by iteratively computing the horizontal divergence and integrating the anelastic mass continuity equation. Experiments with two passes and three passes of the Barnes filter were performed, in addition to a single-pass objective analysis. Comparison of the analyzed three-dimensional wind fields to the model wind fields suggests that multipass objective analysis of radial velocity data prior to dual-Doppler wind synthesis is probably worth the added computational cost. The improvements in the wind syntheses derived from multipass objective analyses are even more apparent for higher-order fields such as vorticity and divergence, and for trajectory calculations and pressure/buoyancy retrievals.
    publisherAmerican Meteorological Society
    titleMultipass Objective Analyses of Doppler Radar Data
    typeJournal Paper
    journal volume25
    journal issue10
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/2008JTECHA1089.1
    journal fristpage1845
    journal lastpage1858
    treeJournal of Atmospheric and Oceanic Technology:;2008:;volume( 025 ):;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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