【摘要】 本文叙述了在某些对流条件下,声雷达探测温度结构系数和风速结构系数(C_T~2和C_V~2)的简便方法.我们用声雷达在北京对于对流发展较好的自由对流体系作了实验,实验得到了9—10点钟时的C_T~2剖面和冬季13点钟时的C_V~2剖面.剖面结果表明,在Z≤0.7Z_i区间的C_T~2和C_V~2剖面与Kaimal等(1976)在明尼苏达(Minnesota)(陆上)的实验结果比较接近,在0.7Z_i≤Z≤Z_i区间,则我们用声雷达测量的C_T~2剖面和极大值都比Kaimal的结果大,并对两者的差别进行讨论.更多还原

【Abstract】 This paper describes a simple method to deteet the temperature and velocity structure coefficients (C2T and C2V) in the atmospheric boundary layer under convec-tive conditions by using sodar. The CT and C2V profiles wore measured in well-developed mixed layer, respectively at 9-10 a.m. and at 1 p.m. in winter. The results have shown that CT and C2V profiles are approximate to the over-land measurements by Ka mal et al. (1976), when Z≤0.7 Zi. But at higher level, 0.7Zi≤Z≤Zi, the C2T profile and its maximum values are overestimated. The causations responsible for the differences have also been discussed.更多还原