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    Nocturnal Meso-Beta Basin and Katabatic Flows on a Midlatitude Island

    Source: Monthly Weather Review:;2007:;volume( 135 ):;issue: 003::page 918
    Author:
    Cuxart, J.
    ,
    Jiménez, M. A.
    ,
    Martínez, D.
    DOI: 10.1175/MWR3329.1
    Publisher: American Meteorological Society
    Abstract: A mesoscale simulation for the island of Majorca, Spain, in the western Mediterranean Sea is used to study the nocturnal system of winds under weak synoptic pressure gradients. A very high vertical resolution is used in the first 500 m above ground level to characterize with large detail the thin circulations close to ground, namely, basin and katabatic flows. It is found that the island, the basin, and the slope scales interact strongly, especially when a quasi-steady state is reached in the second part of the night. A high mountain range creates a high pressure area upwind where local winds can develop. Katabatic flows converge to the valleys where they interact with a cold pool, which is advected slowly to sea by the land?sea night-breeze effect combined with a topographic forcing. The katabatic flows experience small entrainment at the top and have well-defined characteristics. The results are partially confirmed by the observations and some satellite images.
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      Nocturnal Meso-Beta Basin and Katabatic Flows on a Midlatitude Island

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4229370
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    contributor authorCuxart, J.
    contributor authorJiménez, M. A.
    contributor authorMartínez, D.
    date accessioned2017-06-09T17:28:20Z
    date available2017-06-09T17:28:20Z
    date copyright2007/03/01
    date issued2007
    identifier issn0027-0644
    identifier otherams-85875.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4229370
    description abstractA mesoscale simulation for the island of Majorca, Spain, in the western Mediterranean Sea is used to study the nocturnal system of winds under weak synoptic pressure gradients. A very high vertical resolution is used in the first 500 m above ground level to characterize with large detail the thin circulations close to ground, namely, basin and katabatic flows. It is found that the island, the basin, and the slope scales interact strongly, especially when a quasi-steady state is reached in the second part of the night. A high mountain range creates a high pressure area upwind where local winds can develop. Katabatic flows converge to the valleys where they interact with a cold pool, which is advected slowly to sea by the land?sea night-breeze effect combined with a topographic forcing. The katabatic flows experience small entrainment at the top and have well-defined characteristics. The results are partially confirmed by the observations and some satellite images.
    publisherAmerican Meteorological Society
    titleNocturnal Meso-Beta Basin and Katabatic Flows on a Midlatitude Island
    typeJournal Paper
    journal volume135
    journal issue3
    journal titleMonthly Weather Review
    identifier doi10.1175/MWR3329.1
    journal fristpage918
    journal lastpage932
    treeMonthly Weather Review:;2007:;volume( 135 ):;issue: 003
    contenttypeFulltext
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