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    Warm-Air Intrusions in Arizona’s Meteor Crater

    Source: Journal of Applied Meteorology and Climatology:;2012:;volume( 051 ):;issue: 006::page 1010
    Author:
    Adler, Bianca
    ,
    Whiteman, C. David
    ,
    Hoch, Sebastian W.
    ,
    Lehner, Manuela
    ,
    Kalthoff, Norbert
    DOI: 10.1175/JAMC-D-11-0158.1
    Publisher: American Meteorological Society
    Abstract: pisodic nighttime intrusions of warm air, accompanied by strong winds, enter the enclosed near-circular Meteor Crater basin on clear, synoptically undisturbed nights. Data analysis is used to document these events and to determine their spatial and temporal characteristics, their effects on the atmospheric structure inside the crater, and their relationship to larger-scale flows and atmospheric stability. A conceptual model that is based on hydraulic flow theory is offered to explain warm-air-intrusion events at the crater. The intermittent warm-air-intrusion events were closely related to a stable surface layer and a mesoscale (~50 km) drainage flow on the inclined plain outside the crater and to a continuous shallow cold-air inflow that came over the upstream crater rim. Depending on the upstream conditions, the cold-air inflow at the crater rim deepened temporarily and warmer air from above the stable surface layer on the surrounding plain descended into the crater, as part of the flowing layer. The flow descended up to 140 m into the 170-m-deep crater and did not penetrate the approximately 30-m-deep crater-floor inversion. The intruding air, which was up to 5 K warmer than the crater atmosphere, did not extend into the center of the crater, where the nighttime near-isothermal layer in the ambient crater atmosphere remained largely undisturbed. New investigations are suggested to test the hypothesis that the warm-air intrusions are associated with hydraulic jumps.
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      Warm-Air Intrusions in Arizona’s Meteor Crater

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4216794
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    contributor authorAdler, Bianca
    contributor authorWhiteman, C. David
    contributor authorHoch, Sebastian W.
    contributor authorLehner, Manuela
    contributor authorKalthoff, Norbert
    date accessioned2017-06-09T16:48:40Z
    date available2017-06-09T16:48:40Z
    date copyright2012/06/01
    date issued2012
    identifier issn1558-8424
    identifier otherams-74556.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4216794
    description abstractpisodic nighttime intrusions of warm air, accompanied by strong winds, enter the enclosed near-circular Meteor Crater basin on clear, synoptically undisturbed nights. Data analysis is used to document these events and to determine their spatial and temporal characteristics, their effects on the atmospheric structure inside the crater, and their relationship to larger-scale flows and atmospheric stability. A conceptual model that is based on hydraulic flow theory is offered to explain warm-air-intrusion events at the crater. The intermittent warm-air-intrusion events were closely related to a stable surface layer and a mesoscale (~50 km) drainage flow on the inclined plain outside the crater and to a continuous shallow cold-air inflow that came over the upstream crater rim. Depending on the upstream conditions, the cold-air inflow at the crater rim deepened temporarily and warmer air from above the stable surface layer on the surrounding plain descended into the crater, as part of the flowing layer. The flow descended up to 140 m into the 170-m-deep crater and did not penetrate the approximately 30-m-deep crater-floor inversion. The intruding air, which was up to 5 K warmer than the crater atmosphere, did not extend into the center of the crater, where the nighttime near-isothermal layer in the ambient crater atmosphere remained largely undisturbed. New investigations are suggested to test the hypothesis that the warm-air intrusions are associated with hydraulic jumps.
    publisherAmerican Meteorological Society
    titleWarm-Air Intrusions in Arizona’s Meteor Crater
    typeJournal Paper
    journal volume51
    journal issue6
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/JAMC-D-11-0158.1
    journal fristpage1010
    journal lastpage1025
    treeJournal of Applied Meteorology and Climatology:;2012:;volume( 051 ):;issue: 006
    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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