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    Calibration and Tests of a Yaw Sphere-Thermometer System for Sensible Heat Flux Measurements

    Source: Journal of Applied Meteorology:;1974:;volume( 013 ):;issue: 001::page 40
    Author:
    Yap, D.
    ,
    Black, T. A.
    ,
    Oke, T. R.
    DOI: 10.1175/1520-0450(1974)013<0040:CATOAY>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A yaw sphere-thermometer assembly, to measure sensible heat flux density by the eddy correlation method, was built following the design of Tanner and Thurtell. Wind tunnel experiments indicate that the sphere constant should be 1.57, which is significantly less than the theoretical value of 2.25. The effects of tilt indicate that heat fluxes may be in error by 5% per degree of tilt In unstable conditions and up to 11% per degree in stable conditions. Field comparisons of the heat fluxes measured by the yaw sphere-thermometer system and a Bowen ratio apparatus produced satisfactory agreement.
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      Calibration and Tests of a Yaw Sphere-Thermometer System for Sensible Heat Flux Measurements

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4230544
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    • Journal of Applied Meteorology

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    contributor authorYap, D.
    contributor authorBlack, T. A.
    contributor authorOke, T. R.
    date accessioned2017-06-09T17:32:22Z
    date available2017-06-09T17:32:22Z
    date copyright1974/02/01
    date issued1974
    identifier issn0021-8952
    identifier otherams-8693.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4230544
    description abstractA yaw sphere-thermometer assembly, to measure sensible heat flux density by the eddy correlation method, was built following the design of Tanner and Thurtell. Wind tunnel experiments indicate that the sphere constant should be 1.57, which is significantly less than the theoretical value of 2.25. The effects of tilt indicate that heat fluxes may be in error by 5% per degree of tilt In unstable conditions and up to 11% per degree in stable conditions. Field comparisons of the heat fluxes measured by the yaw sphere-thermometer system and a Bowen ratio apparatus produced satisfactory agreement.
    publisherAmerican Meteorological Society
    titleCalibration and Tests of a Yaw Sphere-Thermometer System for Sensible Heat Flux Measurements
    typeJournal Paper
    journal volume13
    journal issue1
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1974)013<0040:CATOAY>2.0.CO;2
    journal fristpage40
    journal lastpage45
    treeJournal of Applied Meteorology:;1974:;volume( 013 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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