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    UARS/MLS Cloud Ice Measurements: Implications for H2O Transport near the Tropopause

    Source: Journal of the Atmospheric Sciences:;2005:;Volume( 062 ):;issue: 002::page 518
    Author:
    Wu, D. L.
    ,
    Read, W. G.
    ,
    Dessler, A. E.
    ,
    Sherwood, S. C.
    ,
    Jiang, J. H.
    DOI: 10.1175/JAS-3382.1
    Publisher: American Meteorological Society
    Abstract: A technique for detecting large hydrometeors at high altitudes is described here and applied to the Upper Atmosphere Research Satellite/Microwave Limb Sounder (UARS/MLS) 203-GHz radiance measurements at tangent pressures between 200 and 46 hPa. At these tangent pressures the radiances remain optically thin and cloudy-sky radiances are brighter than normal clear-sky cases. Unlike infrared/visible cloud observations, the 203-GHz radiances can penetrate most ice clouds and are sensitive to ice crystals of convective origin. Rough ice water content (IWC) retrievals are made near the tropopause using estimated size distributions from in situ convective studies. The seasonal mean IWC observed at 100 hPa reaches vapor-equivalent 20 ppmv or more over convective centers, dominating the total water content. Convectively lofted ice, therefore, appears to be hydrologically significant at the tropical cold point. IWC is well correlated spatially with relative humidity with respect to ice (RHi) at 100 hPa during both the dry (January?March) and moist (July?September) periods.
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      UARS/MLS Cloud Ice Measurements: Implications for H2O Transport near the Tropopause

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4217920
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    • Journal of the Atmospheric Sciences

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    contributor authorWu, D. L.
    contributor authorRead, W. G.
    contributor authorDessler, A. E.
    contributor authorSherwood, S. C.
    contributor authorJiang, J. H.
    date accessioned2017-06-09T16:52:01Z
    date available2017-06-09T16:52:01Z
    date copyright2005/02/01
    date issued2005
    identifier issn0022-4928
    identifier otherams-75570.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4217920
    description abstractA technique for detecting large hydrometeors at high altitudes is described here and applied to the Upper Atmosphere Research Satellite/Microwave Limb Sounder (UARS/MLS) 203-GHz radiance measurements at tangent pressures between 200 and 46 hPa. At these tangent pressures the radiances remain optically thin and cloudy-sky radiances are brighter than normal clear-sky cases. Unlike infrared/visible cloud observations, the 203-GHz radiances can penetrate most ice clouds and are sensitive to ice crystals of convective origin. Rough ice water content (IWC) retrievals are made near the tropopause using estimated size distributions from in situ convective studies. The seasonal mean IWC observed at 100 hPa reaches vapor-equivalent 20 ppmv or more over convective centers, dominating the total water content. Convectively lofted ice, therefore, appears to be hydrologically significant at the tropical cold point. IWC is well correlated spatially with relative humidity with respect to ice (RHi) at 100 hPa during both the dry (January?March) and moist (July?September) periods.
    publisherAmerican Meteorological Society
    titleUARS/MLS Cloud Ice Measurements: Implications for H2O Transport near the Tropopause
    typeJournal Paper
    journal volume62
    journal issue2
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/JAS-3382.1
    journal fristpage518
    journal lastpage530
    treeJournal of the Atmospheric Sciences:;2005:;Volume( 062 ):;issue: 002
    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