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    Numerical Analysis of a Mediterranean “Hurricane” over Southeastern Italy

    Source: Monthly Weather Review:;2008:;volume( 136 ):;issue: 011::page 4373
    Author:
    Moscatello, Agata
    ,
    Miglietta, Mario Marcello
    ,
    Rotunno, Richard
    DOI: 10.1175/2008MWR2512.1
    Publisher: American Meteorological Society
    Abstract: The presence of a subsynoptic-scale vortex over the Mediterranean Sea in southeastern Italy on 26 September 2006 has been recently documented by the authors. The transit of the cyclone over land allowed an accurate diagnosis of the structure of the vortex, based on radar and surface station data, showing that the cyclone had features similar to those observed in tropical cyclones. To investigate the cyclone in greater depth, numerical simulations have been performed using the Weather Research and Forecasting (WRF) model, set up with two domains, in a two-way-nested configuration. Model simulations are able to properly capture the timing and intensity of the small-scale cyclone. Moreover, the present simulated cyclone agrees with the observational analysis of this case, identifying in this small-scale depression the typical characteristics of a Mediterranean tropical-like cyclone. An analysis of the mechanisms responsible for the genesis, development, and maintenance of the cyclone has also been performed. Sensitivity experiments show that cyclogenesis on the lee side of the Atlas Mountains is responsible for the generation of the cyclone. Surface sensible and latent heat fluxes become important during the subsequent phase of development in which the lee-vortex shallow depression evolved as it moved toward the south of Sicily. During this phase, the latent heating, associated with convective motions triggered by a cold front entering the central Mediterranean area, was important for the intensification and contraction of the horizontal scale of the vortex. The small-scale cyclone subsequently deepened as it moved over the Ionian Sea and then maintained its intensity during its later transit over the Adriatic Sea; in this later stage, latent heat release continued to play a major role in amplifying and maintaining the vortex, while the importance of the surface fluxes diminished.
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      Numerical Analysis of a Mediterranean “Hurricane” over Southeastern Italy

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4209391
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    contributor authorMoscatello, Agata
    contributor authorMiglietta, Mario Marcello
    contributor authorRotunno, Richard
    date accessioned2017-06-09T16:26:23Z
    date available2017-06-09T16:26:23Z
    date copyright2008/11/01
    date issued2008
    identifier issn0027-0644
    identifier otherams-67894.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4209391
    description abstractThe presence of a subsynoptic-scale vortex over the Mediterranean Sea in southeastern Italy on 26 September 2006 has been recently documented by the authors. The transit of the cyclone over land allowed an accurate diagnosis of the structure of the vortex, based on radar and surface station data, showing that the cyclone had features similar to those observed in tropical cyclones. To investigate the cyclone in greater depth, numerical simulations have been performed using the Weather Research and Forecasting (WRF) model, set up with two domains, in a two-way-nested configuration. Model simulations are able to properly capture the timing and intensity of the small-scale cyclone. Moreover, the present simulated cyclone agrees with the observational analysis of this case, identifying in this small-scale depression the typical characteristics of a Mediterranean tropical-like cyclone. An analysis of the mechanisms responsible for the genesis, development, and maintenance of the cyclone has also been performed. Sensitivity experiments show that cyclogenesis on the lee side of the Atlas Mountains is responsible for the generation of the cyclone. Surface sensible and latent heat fluxes become important during the subsequent phase of development in which the lee-vortex shallow depression evolved as it moved toward the south of Sicily. During this phase, the latent heating, associated with convective motions triggered by a cold front entering the central Mediterranean area, was important for the intensification and contraction of the horizontal scale of the vortex. The small-scale cyclone subsequently deepened as it moved over the Ionian Sea and then maintained its intensity during its later transit over the Adriatic Sea; in this later stage, latent heat release continued to play a major role in amplifying and maintaining the vortex, while the importance of the surface fluxes diminished.
    publisherAmerican Meteorological Society
    titleNumerical Analysis of a Mediterranean “Hurricane” over Southeastern Italy
    typeJournal Paper
    journal volume136
    journal issue11
    journal titleMonthly Weather Review
    identifier doi10.1175/2008MWR2512.1
    journal fristpage4373
    journal lastpage4397
    treeMonthly Weather Review:;2008:;volume( 136 ):;issue: 011
    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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