The Study of Low-Level Wind Shear and Structure of Small Scale Turbulence Occurred in the Sea Breeze Penetration.

高知大学大气边界层观测台（ABO）在1986 ~ 1991年对海风进行了观测。利用[1]声波风速体温计（SAT）和[2]多普勒雷达（[2]Doppler sodar）两种主要测量设备，研究了海风穿透时间和海风穿透对表层湍流结构的影响。SAT和Sodar测得的穿透时间经验公式经谐波分析，季节变化明显，且与日出时间变化密切相关。海风锋经常在地面出现一些较强的风切变，反映出大的下降气流（锋面穿透前）和上升气流（锋面穿透后）。这些流动还影响着湍流尺度和湍流动能耗散等湍流量。

The observation of the sea breeze has been carried out in the Atmospheric Boundary-Layer Observatory (ABO) of Kochi University during the period from 1986 to 1991. The two main measuring equipments ([1]Sonic Anemometer-Thermometer (SAT) and[2]Doppler sodar) were used to investigate the penetration time of sea breeze and the turbulent structure of the surface layer affected by the sea breeze pnetration.The empirical formulae of the penetration time obtained by both SAT and Sodar, after a harmonic analysis, indicate clear seasonal variation and strongly related to variation in sun rise time.Sea breeze front often occasion some of the strong wind shear at the surface, reflecting the large downdraft (before front penetration) and updraft (after front penetration). These flows also effect the turbulence quantities such as the scale of turbulence and the dissipation of turbulent kinetic energy.