Analysis of the Characteristics of Atmospheric Turbulence in Marine Surface of South China Sea Based on the Routine Meteorology Factors

The indirect way using meteorology factors to estimate the atmospheric turbulence has been taken to describe the characteristic of atmospheric turbulence in marine surface layer in large spatial and temporal scale as for the limitation of direct observation method. The algorithm based on the fluctuation of temperature wind speed and humidity offered by friehe is taken into account, the data we selected relative to this research is from 10 to 21 of north latitude and 110 to 120 degrees east longitude time span from 1965 to 1997. Firstly, we treat all the data of 33 years an average for every moment according to observing point, in this way the totally average of all the routine meteorology factors of typical marine surface layer are obtained, then we make a statistic for air sea temperature differences (ASTD) by month, and 12 groups of data about fluctuation of ASTD are obtained, We chose the maximum and minimum month (December and March) in the fluctuation of ASTD to indicate the spatial distribution of the strength of atmospheric turbulence. It turns out that the range of mean turbulence is from 10(-17) to 10(-14), there are significant seasonal changes about atmospheric turbulence in marine surface of South China Sea, in general turbulence is much stronger in winter than it in summer, and in seacoast the turbulence is stronger than it in mare liberum, it may be related to the effect of land frontier to wind speed.