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ZHANG Hongsheng, LIU Xinjian, ZHU Hao, et al. 2010: Characteristics of Turbulent Transfer during the Strong Wind Period in the Northern Suburbs of Beijing. Chinese Journal of Atmospheric Sciences, 34(3): 661-668. DOI: 10.3878/j.issn.1006-9895.2010.03.17
Citation: ZHANG Hongsheng, LIU Xinjian, ZHU Hao, et al. 2010: Characteristics of Turbulent Transfer during the Strong Wind Period in the Northern Suburbs of Beijing. Chinese Journal of Atmospheric Sciences, 34(3): 661-668. DOI: 10.3878/j.issn.1006-9895.2010.03.17

Characteristics of Turbulent Transfer during the Strong Wind Period in the Northern Suburbs of Beijing

  • Based on the data collected from the 325-m meteorological tower operated by the Institute of Atmospheric Physics of Chinese Academy of Sciences in the northern suburbs of Beijing during the period from December 1993 through January 1994, the characteristics of the turbulent fluxes measured at the heights of 47 m and 120 m, and their variations with respect to the wind speed and stability parameters during the passage of strong wind are analyzed. The results indicated that the strong wind has great influence on the turbulent transfer in the near surface layer. There is a short period before the strong wind when the momentum flux is upward, and the heat flux is downward. The turbulent fluxes during the strong wind episode are obviously larger than those after the passage of strong wind. The horizontal turbulent fluxes and the energy increment are larger than the vertical values. The correlations between the turbulent fluxes and the wind speed, and turbulent kinetic energy increase rapidly when the wind speed exceeds the threshold value. The low-frequency component in the spectrum of turbulence rises, and the turbulent spectral curve widens. The energy budget in the surface layer can be strongly influenced by the strong wind.
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