Advances in Atmospheric Sciences

, Volume 20, Issue 1, pp 111–118 | Cite as

A Parameterization Scheme of Surface Turbulent Momentum and Sensible Heat over the Gobi Underlying Surface

  • Qiang Zhang
  • Ronghui Huang
  • Hui Tian


The parameterization of surface turbulent fluxes over the Gobi Desert in arid regions is studied by using rationally screened observational data. First, the characteristics of Monin-Obukhov similarity functions are analyzed and their empirical formulae are fitted. The results show that fitted curves of changes of similarity functions of wind speed and temperature with stability parameter differ little from the typical empirical curves and are within the ranges of scatter of the empirical curves, but their values in the neutral condition arc different from the typical values to some extent. Furthermore, average values of momentum and scalar (sensible heat) roughness lengths as well as changes of scalar roughness length with friction velocity are determined by utilizing the data. It is found that the average values of scalar roughness length are about one order smaller than that of the momentum roughness length and decrease with increasing friction velocity, but they are evidently larger than their theoretically forecasted values.

Key words

Gobi surface turbulent flux parameterization similarity functions scalar roughness length 


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Copyright information

© the editorial office of Advancees in Atmospheric Sciences (China) 2003

Authors and Affiliations

  1. 1.Institute of Arid MeteorologyChina Meteorological AdministrationLanzhou
  2. 2.Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing
  3. 3.Cold and Arid Regions Environment and Engineering InstituteChinese Academy of SciencesLanzhou

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