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    Multiscale Analysis of a Meso-β Frontal Passage in the Complex Terrain of the Colorado Front Range

    Source: Monthly Weather Review:;1999:;volume( 127 ):;issue: 009::page 2062
    Author:
    Darby, Lisa S.
    ,
    Neff, William D.
    ,
    Banta, Robert M.
    DOI: 10.1175/1520-0493(1999)127<2062:MAOAMF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Data from a mesoscale observing network are used to describe the evolution of a complex boundary between a dry air mass near the foothills of the Rocky Mountains and a shallow moist air mass over the eastern plains. Synoptic-scale analyses revealed that the origin of the moist air mass was associated with lee cyclogenesis. Mesoscale analyses provided a detailed picture of a localized anticyclonic circulation that developed within the larger-scale flow. Mixing ratio data from the mesoscale observing network indicated the position of the boundary between the air masses. It is shown that the cooler, moister air on the plains advanced toward and retreated away from the foothills during the evening. Eventually, downslope winds that were opposing the motion of the mesoscale boundary decreased, and the anticyclonic circulation on the plains became more organized. On an even smaller scale, Doppler lidar measurements revealed characteristics of the wind flow associated with the mesofront and the interaction of this flow with the downslope winds near the foothills of the Rocky Mountains. These characteristics included the horizontal variability of the winds near the complex foothills topography; the vertical structure of the winds associated with the mesofront, which indicated density-current-like features; the vertical structure of strong downslope flow opposing the mesofront?s motion; and differences in the aerosol content of the air masses.
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      Multiscale Analysis of a Meso-β Frontal Passage in the Complex Terrain of the Colorado Front Range

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4204362
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    • Monthly Weather Review

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    contributor authorDarby, Lisa S.
    contributor authorNeff, William D.
    contributor authorBanta, Robert M.
    date accessioned2017-06-09T16:12:36Z
    date available2017-06-09T16:12:36Z
    date copyright1999/09/01
    date issued1999
    identifier issn0027-0644
    identifier otherams-63367.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4204362
    description abstractData from a mesoscale observing network are used to describe the evolution of a complex boundary between a dry air mass near the foothills of the Rocky Mountains and a shallow moist air mass over the eastern plains. Synoptic-scale analyses revealed that the origin of the moist air mass was associated with lee cyclogenesis. Mesoscale analyses provided a detailed picture of a localized anticyclonic circulation that developed within the larger-scale flow. Mixing ratio data from the mesoscale observing network indicated the position of the boundary between the air masses. It is shown that the cooler, moister air on the plains advanced toward and retreated away from the foothills during the evening. Eventually, downslope winds that were opposing the motion of the mesoscale boundary decreased, and the anticyclonic circulation on the plains became more organized. On an even smaller scale, Doppler lidar measurements revealed characteristics of the wind flow associated with the mesofront and the interaction of this flow with the downslope winds near the foothills of the Rocky Mountains. These characteristics included the horizontal variability of the winds near the complex foothills topography; the vertical structure of the winds associated with the mesofront, which indicated density-current-like features; the vertical structure of strong downslope flow opposing the mesofront?s motion; and differences in the aerosol content of the air masses.
    publisherAmerican Meteorological Society
    titleMultiscale Analysis of a Meso-β Frontal Passage in the Complex Terrain of the Colorado Front Range
    typeJournal Paper
    journal volume127
    journal issue9
    journal titleMonthly Weather Review
    identifier doi10.1175/1520-0493(1999)127<2062:MAOAMF>2.0.CO;2
    journal fristpage2062
    journal lastpage2082
    treeMonthly Weather Review:;1999:;volume( 127 ):;issue: 009
    contenttypeFulltext
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