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    Modeling of the Melting Layer. Part III: The Density Effect

    Source: Journal of the Atmospheric Sciences:;2005:;Volume( 062 ):;issue: 010::page 3705
    Author:
    Zawadzki, I.
    ,
    Szyrmer, W.
    ,
    Bell, C.
    ,
    Fabry, F.
    DOI: 10.1175/JAS3563.1
    Publisher: American Meteorological Society
    Abstract: A model of the melting snow and its radar reflectivity is presented here. The main addition to previous description of the melting layer is the explicit introduction of snow density as a variable. The model is validated with radar observations. Differences in brightband intensity for comparable precipitation rates are related here to the coexistence of supercooled cloud water (SCW) with snow above the melting level leading to riming and change in snow density. Cases where riming was suspected were selected according to the characteristics of the vertical profile of reflectivity flux above the melting layer and vertical Doppler velocities faster than expected from low-density snow. For stratiform precipitation with a melting layer, high snow-to-rain velocity ratio indicates high-density snow and consequently a small peak-to-rain reflectivity difference is expected. This relationship was computed from the model and confirmed with vertically pointing radar observations. In spite of the complexity of the physical processes present in the melting layer the model appears to capture the essential elements.
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      Modeling of the Melting Layer. Part III: The Density Effect

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4218120
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    contributor authorZawadzki, I.
    contributor authorSzyrmer, W.
    contributor authorBell, C.
    contributor authorFabry, F.
    date accessioned2017-06-09T16:52:32Z
    date available2017-06-09T16:52:32Z
    date copyright2005/10/01
    date issued2005
    identifier issn0022-4928
    identifier otherams-75750.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4218120
    description abstractA model of the melting snow and its radar reflectivity is presented here. The main addition to previous description of the melting layer is the explicit introduction of snow density as a variable. The model is validated with radar observations. Differences in brightband intensity for comparable precipitation rates are related here to the coexistence of supercooled cloud water (SCW) with snow above the melting level leading to riming and change in snow density. Cases where riming was suspected were selected according to the characteristics of the vertical profile of reflectivity flux above the melting layer and vertical Doppler velocities faster than expected from low-density snow. For stratiform precipitation with a melting layer, high snow-to-rain velocity ratio indicates high-density snow and consequently a small peak-to-rain reflectivity difference is expected. This relationship was computed from the model and confirmed with vertically pointing radar observations. In spite of the complexity of the physical processes present in the melting layer the model appears to capture the essential elements.
    publisherAmerican Meteorological Society
    titleModeling of the Melting Layer. Part III: The Density Effect
    typeJournal Paper
    journal volume62
    journal issue10
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/JAS3563.1
    journal fristpage3705
    journal lastpage3723
    treeJournal of the Atmospheric Sciences:;2005:;Volume( 062 ):;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
    yabeshDSpacePersian