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    Direct Radiative Effect of Mineral Dust on the Development of African Easterly Waves in Late Summer, 2003–07

    Source: Journal of Applied Meteorology and Climatology:;2012:;volume( 051 ):;issue: 012::page 2090
    Author:
    Ma, Po-Lun
    ,
    Zhang, Kai
    ,
    Shi, Jainn Jong
    ,
    Matsui, Toshihisa
    ,
    Arking, Albert
    DOI: 10.1175/JAMC-D-11-0215.1
    Publisher: American Meteorological Society
    Abstract: pisodic events of both Saharan dust outbreaks and African easterly waves (AEWs) are observed to move westward over the eastern tropical Atlantic Ocean. The relationship between the warm, dry, and dusty Saharan air layer on the nearby storms has been the subject of considerable debate. In this study, the Weather Research and Forecasting model is used to investigate the radiative effect of dust on the development of AEWs during August and September, the months of maximum tropical cyclone activity, in years 2003?07. The simulations show that dust radiative forcing enhances the convective instability of the environment. As a result, most AEWs intensify in the presence of a dust layer. The Lorenz energy cycle analysis reveals that the dust radiative forcing enhances the condensational heating, which elevates the zonal and eddy available potential energy. In turn, available potential energy is effectively converted to eddy kinetic energy, in which local convective overturning plays the primary role. The magnitude of the intensification effect depends on the initial environmental conditions, including moisture, baroclinity, and the depth of the boundary layer. The authors conclude that dust radiative forcing, albeit small, serves as a catalyst to promote local convection that facilitates AEW development.
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      Direct Radiative Effect of Mineral Dust on the Development of African Easterly Waves in Late Summer, 2003–07

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4216843
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    contributor authorMa, Po-Lun
    contributor authorZhang, Kai
    contributor authorShi, Jainn Jong
    contributor authorMatsui, Toshihisa
    contributor authorArking, Albert
    date accessioned2017-06-09T16:48:49Z
    date available2017-06-09T16:48:49Z
    date copyright2012/12/01
    date issued2012
    identifier issn1558-8424
    identifier otherams-74601.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4216843
    description abstractpisodic events of both Saharan dust outbreaks and African easterly waves (AEWs) are observed to move westward over the eastern tropical Atlantic Ocean. The relationship between the warm, dry, and dusty Saharan air layer on the nearby storms has been the subject of considerable debate. In this study, the Weather Research and Forecasting model is used to investigate the radiative effect of dust on the development of AEWs during August and September, the months of maximum tropical cyclone activity, in years 2003?07. The simulations show that dust radiative forcing enhances the convective instability of the environment. As a result, most AEWs intensify in the presence of a dust layer. The Lorenz energy cycle analysis reveals that the dust radiative forcing enhances the condensational heating, which elevates the zonal and eddy available potential energy. In turn, available potential energy is effectively converted to eddy kinetic energy, in which local convective overturning plays the primary role. The magnitude of the intensification effect depends on the initial environmental conditions, including moisture, baroclinity, and the depth of the boundary layer. The authors conclude that dust radiative forcing, albeit small, serves as a catalyst to promote local convection that facilitates AEW development.
    publisherAmerican Meteorological Society
    titleDirect Radiative Effect of Mineral Dust on the Development of African Easterly Waves in Late Summer, 2003–07
    typeJournal Paper
    journal volume51
    journal issue12
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/JAMC-D-11-0215.1
    journal fristpage2090
    journal lastpage2104
    treeJournal of Applied Meteorology and Climatology:;2012:;volume( 051 ):;issue: 012
    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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