摘要
提出一个含６个参数的塔层风廓线模式，这６个参数由相似理论和满足边界层运动方程的条件来确定，因而动力学上是合理的．根据近地层的通量便能确定这６个参数，而近地层通量又可由近地层二高度上的风，温确定，因而本模式具有实用价值．用大气所气象塔有限资料验证，廓线模式达到了一定的精度，优于前人结果．
The current wind profile formula in tower layer usually contains logarithmic terms and the corrected terms, which is empirical and does not satisfy the motin equation of planetary boundary layer. In this paper, we suggest a profile model of the wind in the tower layer with six parameters based on the current profiles. It contains the logarithmic term, linear and quardratic terms of nondimensional height and six parameters which should be determinde. In this paper, these six parameters are determined by similarity theory of the PBL and the condition that the profile formulas satisfy the motion equation of the PBL at two levels in the tower layer and the integration condition of the motion equation of the PBL over the depth of PBL, consequently, this profile model is dynamically reasonable. these six parameters can be computed from fluxes in the surface layer which may be determined by the wind speeds and temperatures at two levels in the surface layer using traditional method, hence, this model can be applied in practice. We can compute the wind in the tower layer as long as the wind speed and temperature at two levels in the surface layer are measured. We have verified the model by the use of the limited data measured at the meteorological tower of IAP both in stable and unstable conditions during stedy weather periods. The results show that the model attains a fairly high accuracy and is superior to previous models.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1998年第3期341-349,共9页
Journal of Nanjing University（Natural Science）
基金
国家自然科学基金
中科院大气边界层物理和大气化学国家重点实验室的资助
关键词
塔层
风廓线
相似理论
边界层运动方程
tower layer
wind profile
similarity theory
PBL motion equation
