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    An Evaluation of a Diagnostic Wind Model (CALMET)

    Source: Journal of Applied Meteorology and Climatology:;2008:;volume( 047 ):;issue: 006::page 1739
    Author:
    Wang, Weiguo
    ,
    Shaw, William J.
    ,
    Seiple, Timothy E.
    ,
    Rishel, Jeremy P.
    ,
    Xie, Yulong
    DOI: 10.1175/2007JAMC1602.1
    Publisher: American Meteorological Society
    Abstract: A U.S. Environmental Protection Agency (EPA)-approved diagnostic wind model [California Meteorological Model (CALMET)] was evaluated during a typical lake-breeze event under fair weather conditions in the Chicago region. The authors focused on the performance of CALMET in terms of simulating winds that were highly variable in space and time. The reference winds were generated by the fifth-generation Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5) assimilating system, with which CALMET results were compared. Statistical evaluations were conducted to quantify overall model differences in wind speed and direction over the domain. Below 850 m above the surface, relative differences in (layer averaged) wind speed were about 25%?40% during the simulation period; wind direction differences generally ranged from 6° to 20°. Above 850 m, the differences became larger because of the limited number of upper-air stations near the studied domain. Analyses implied that model differences were dependent on time because of time-dependent spatial variability in winds. Trajectory analyses were made to examine the likely spatial dependence of CALMET deviations from the reference winds within the domain. These analyses suggest that the quality of CALMET winds in local areas depended on their proximity to the lake-breeze front position. Large deviations usually occurred near the front area, where observations cannot resolve the spatial variability of wind, or in the fringe of the domain, where observations are lacking. Results simulated using different datasets and model options were also compared. Differences between CALMET and the reference winds tended to be reduced with data sampled from more stations or from more uniformly distributed stations. Suggestions are offered for further improving or interpreting CALMET results under complex wind conditions in the Chicago region, which may also apply to other regions.
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      An Evaluation of a Diagnostic Wind Model (CALMET)

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4206548
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    • Journal of Applied Meteorology and Climatology

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    contributor authorWang, Weiguo
    contributor authorShaw, William J.
    contributor authorSeiple, Timothy E.
    contributor authorRishel, Jeremy P.
    contributor authorXie, Yulong
    date accessioned2017-06-09T16:18:09Z
    date available2017-06-09T16:18:09Z
    date copyright2008/06/01
    date issued2008
    identifier issn1558-8424
    identifier otherams-65334.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4206548
    description abstractA U.S. Environmental Protection Agency (EPA)-approved diagnostic wind model [California Meteorological Model (CALMET)] was evaluated during a typical lake-breeze event under fair weather conditions in the Chicago region. The authors focused on the performance of CALMET in terms of simulating winds that were highly variable in space and time. The reference winds were generated by the fifth-generation Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5) assimilating system, with which CALMET results were compared. Statistical evaluations were conducted to quantify overall model differences in wind speed and direction over the domain. Below 850 m above the surface, relative differences in (layer averaged) wind speed were about 25%?40% during the simulation period; wind direction differences generally ranged from 6° to 20°. Above 850 m, the differences became larger because of the limited number of upper-air stations near the studied domain. Analyses implied that model differences were dependent on time because of time-dependent spatial variability in winds. Trajectory analyses were made to examine the likely spatial dependence of CALMET deviations from the reference winds within the domain. These analyses suggest that the quality of CALMET winds in local areas depended on their proximity to the lake-breeze front position. Large deviations usually occurred near the front area, where observations cannot resolve the spatial variability of wind, or in the fringe of the domain, where observations are lacking. Results simulated using different datasets and model options were also compared. Differences between CALMET and the reference winds tended to be reduced with data sampled from more stations or from more uniformly distributed stations. Suggestions are offered for further improving or interpreting CALMET results under complex wind conditions in the Chicago region, which may also apply to other regions.
    publisherAmerican Meteorological Society
    titleAn Evaluation of a Diagnostic Wind Model (CALMET)
    typeJournal Paper
    journal volume47
    journal issue6
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/2007JAMC1602.1
    journal fristpage1739
    journal lastpage1756
    treeJournal of Applied Meteorology and Climatology:;2008:;volume( 047 ):;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
    yabeshDSpacePersian