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    Climatology of the Low-Level Jet at the Southern Great Plains Atmospheric Boundary Layer Experiments Site

    Source: Journal of Applied Meteorology:;2005:;volume( 044 ):;issue: 010::page 1593
    Author:
    Song, Jie
    ,
    Liao, Ke
    ,
    Coulter, Richard L.
    ,
    Lesht, Barry M.
    DOI: 10.1175/JAM2294.1
    Publisher: American Meteorological Society
    Abstract: A unique dataset obtained with combinations of minisodars and 915-MHz wind profilers at the Atmospheric Boundary Layer Experiments (ABLE) facility in Kansas was used to examine the detailed characteristics of the nocturnal low-level jet (LLJ). In contrast to instruments used in earlier studies, the ABLE instruments provide hourly, high-resolution vertical profiles of wind velocity from just above the surface to approximately 2 km above ground level (AGL). Furthermore, the 6-yr span of the dataset allowed the examination of interannual variability in jet properties with improved statistical reliability. It was found that LLJs occurred during 63% of the nighttime periods sampled. Although most of the observed jets were southerly, a substantial fraction (28%) was northerly. Wind maxima occurred most frequently at 200?400 m AGL, though some jets were found as low as 50 m, and the strongest jets tended to occur above 300 m. Comparison of LLJ heights at three locations within the ABLE domain and at one location outside the domain suggests that the jet is equipotential rather than terrain following. The occurrence of southerly LLJ varied annually in a way that suggests a connection between the tendency for jet formation and the large-scale circulation patterns associated with El Niño and La Niña, as well as with the Pacific decadal oscillation. Frequent and strong southerly jets that transport moisture downstream do not necessarily lead to more precipitation locally, however.
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      Climatology of the Low-Level Jet at the Southern Great Plains Atmospheric Boundary Layer Experiments Site

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4216430
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    contributor authorSong, Jie
    contributor authorLiao, Ke
    contributor authorCoulter, Richard L.
    contributor authorLesht, Barry M.
    date accessioned2017-06-09T16:47:39Z
    date available2017-06-09T16:47:39Z
    date copyright2005/10/01
    date issued2005
    identifier issn0894-8763
    identifier otherams-74228.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4216430
    description abstractA unique dataset obtained with combinations of minisodars and 915-MHz wind profilers at the Atmospheric Boundary Layer Experiments (ABLE) facility in Kansas was used to examine the detailed characteristics of the nocturnal low-level jet (LLJ). In contrast to instruments used in earlier studies, the ABLE instruments provide hourly, high-resolution vertical profiles of wind velocity from just above the surface to approximately 2 km above ground level (AGL). Furthermore, the 6-yr span of the dataset allowed the examination of interannual variability in jet properties with improved statistical reliability. It was found that LLJs occurred during 63% of the nighttime periods sampled. Although most of the observed jets were southerly, a substantial fraction (28%) was northerly. Wind maxima occurred most frequently at 200?400 m AGL, though some jets were found as low as 50 m, and the strongest jets tended to occur above 300 m. Comparison of LLJ heights at three locations within the ABLE domain and at one location outside the domain suggests that the jet is equipotential rather than terrain following. The occurrence of southerly LLJ varied annually in a way that suggests a connection between the tendency for jet formation and the large-scale circulation patterns associated with El Niño and La Niña, as well as with the Pacific decadal oscillation. Frequent and strong southerly jets that transport moisture downstream do not necessarily lead to more precipitation locally, however.
    publisherAmerican Meteorological Society
    titleClimatology of the Low-Level Jet at the Southern Great Plains Atmospheric Boundary Layer Experiments Site
    typeJournal Paper
    journal volume44
    journal issue10
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/JAM2294.1
    journal fristpage1593
    journal lastpage1606
    treeJournal of Applied Meteorology:;2005:;volume( 044 ):;issue: 010
    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