基于气象参数戈壁沙漠地区近地面大气湍流建模
Modeling of atmospheric turbulence in surface layer over desert based on meteorological parameters
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摘要: 提出一种适合戈壁沙漠地区的近地面大气湍流模型。通过测量近地面层不同高度处温度、湿度、压强和风速等常规气象参数，结合模型可给出近地面层大气湍流强度。模型计算的近地面层大气湍流强度通常白天值最大，中午前后出现较宽的最大值区间，在日出时段和日落时段出现较明显的最小值，夜间呈不规则变化，该结果能够很好地反映近地面层大气湍流强度的变化特性。在影响大气湍流强度变化的参数中，大气温度的变化趋势直接影响着大气湍流强度的变化：通常白天大气温差较高时，大气湍流强度较强；大气温差较低时，大气湍流强度较弱；大气温差起伏较大的时刻，大气湍流强度的变化也会较大，大气温差起伏趋势与大气湍流强度变化趋势有相似之处。Abstract: A numerical model of atmospheric turbulence in surface layer over desert is presented. Through measuring meteorological parameters including temperature, humidity, pressure and wind speed, atmospheric turbulence strength in the surface layer can be obtained. The calculation results of the model show that, generally, the maximum strength appears the midday, and the minimum appears about the sunrise and the sunset, while the strength changes irregularly at night, reflecting the atmospheric turbulence variational characteristics in the surface layer perfectly. In all the meteorological parameters, the variation of temperature affects the atmospheric turbulence strength directly. The strength changes in the same direction as the change in temperature, and larger strength variation corresponds
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