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Volume 20 Issue 3

May  2003

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2003 >  20(3): 369-378

Analyses of Turbulence Parameters in the Near-Surface Layer at Qamdo of the Southeastern Tibetan Plateau

  • 1.

    Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081,National Marine Environment Forecast Center, Beijing 100081,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029


doi: 10.1007/BF02690795

  • The characteristics of the turbulence spectrum, turbulence variance, and turbulence flux at Qamdo overthe Southeastern Tibetan Plateau measured during the TIPEX experiment from 18 May to 30 June 1998are analyzed by the eddy correlation method. During periods of intense convection, most of the spectraof the 3D winds, temperature, and humidity follow a power law with a slope of -2/3. The normalizedvariances of the 3D winds in relation to z/L satisfy the similarity law but the normalized variances oftemperature and humidity are related to z/L by a -1/3 power law only in unstable conditions. In near-neutral stratification, σu/u* and σy/u* at Qamdo and Gerze are nearly constant in rugged terrain andσw/u* at Qamdo and Gerze is similar to the value found in plains, which indicates that the, effects oflandform on vertical turbulence is not significant over the southeast and western Tibetan Plateau. Duringthe dry period, the sensible heat dominates, comprising 81% of the heat intensity, with the other 19%being latent heat; during the wet period on the other hand, the latent heat accounts for about 64% ofthe available energy and the sensible heat only around 36%. The maximum intensity of the heating of airoccurs in the middle of the Plateau during the summertime.
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    [2] Guoxiong WU, Bian HE, Anmin DUAN, Yimin LIU, Wei YU, 2017: Formation and Variation of the Atmospheric Heat Source over the Tibetan Plateau and Its Climate Effects, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 1169-1184.  doi: 10.1007/s00376-017-7014-5
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    • Manuscript History

    Manuscript received: 10 May 2003
    Manuscript revised: 10 May 2003
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Analyses of Turbulence Parameters in the Near-Surface Layer at Qamdo of the Southeastern Tibetan Plateau

    • 1. Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081,National Marine Environment Forecast Center, Beijing 100081,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
    • Manuscript received: 2003-05-10
    • Manuscript revised: 2003-05-10

    Abstract: The characteristics of the turbulence spectrum, turbulence variance, and turbulence flux at Qamdo overthe Southeastern Tibetan Plateau measured during the TIPEX experiment from 18 May to 30 June 1998are analyzed by the eddy correlation method. During periods of intense convection, most of the spectraof the 3D winds, temperature, and humidity follow a power law with a slope of -2/3. The normalizedvariances of the 3D winds in relation to z/L satisfy the similarity law but the normalized variances oftemperature and humidity are related to z/L by a -1/3 power law only in unstable conditions. In near-neutral stratification, σu/u* and σy/u* at Qamdo and Gerze are nearly constant in rugged terrain andσw/u* at Qamdo and Gerze is similar to the value found in plains, which indicates that the, effects oflandform on vertical turbulence is not significant over the southeast and western Tibetan Plateau. Duringthe dry period, the sensible heat dominates, comprising 81% of the heat intensity, with the other 19%being latent heat; during the wet period on the other hand, the latent heat accounts for about 64% ofthe available energy and the sensible heat only around 36%. The maximum intensity of the heating of airoccurs in the middle of the Plateau during the summertime.

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