声雷达探测与直接测量温度结构系数的对比研究

本文用对比方法研究声雷达定量探测温度结构系数的接收因子和衰减因子,分析了接收因子与某些气象要素的关系。分析结果表明,在63米高度上接收因子E=C_T,a²/C_T,d²与局地稳定度有关,它随稳定度的增大而增大;E值大小还与水汽量有关,E随水汽量的增大而增大;E值大小还与高度有关,它随高度增大而减小。分析结果还表明,在稳定条件下,衰减因子L_E(E₁₆₀/E₆₃)的大小与160米高度上的水平风速有关,它随风速的增大而增大。文中还对气象条件对声雷达定量探测温度结构系数的影响进行了讨论。

A COMPARATIVE STUDY BETWEEN THE TEMPERATURE STRUCTURE COEFFICIENTS DETECTED BY SODAR AND DIRECT METHODS

The receiving factor and the attenuation factor of temperature structure coefficients detected by sodar are studies by comparative method. The analytical results show that the receiving factor E=C_T,a²/C_T,d² at height 63m is related to local stability, and it increases with increase of stability. The receiving factor E is related to water vapor as well, it increases with increase of water vapor. The attenuation factor （L_E= E₁₆₀/E₆₃） is related to horizontal wind velocity at 160m under stable condition. It is increased with increase of horizontal wind velocity. Finally, effects of meteorological factors on temperature structure coefficient detected by sodar are discussed.