无量纲廓线函数对稳定度分类的影响

Influence of dimensionless profile on the stability classification.

讨论了无量纲廓线函数对稳定度分类标准计算结果的影响,利用北京325m气象铁塔的超声脉动资料和常规梯度观测资料,对4种无量纲廓线函数进行比较.结果表明,对于北京地区Businger-Hick公式最合适,风速比法稳定度分类标准不是稳定度级别的单调函数.

The calculation results of the influence of dimensionless profile on the limit for stability classification was discussed in this paper, the comparison of 4 kinds of dimensionless profile was made with the conventional ladder degree observation data and ultrasonic pulsation data of 325m meteorological tower in Beijing. Businger-Hick formula was most adaptable relatively for Beijing area. An abnormal result was discovered in calculation was that the limit for stability classification with wind speed rate method was not the dull function of stability grade.