近地面层大气折射率结构常数的模式研究

 运用Bulk方法对东南沿海和合肥一水库附近的折射率结构常数进行了估算，为避免海边海盐对金属丝的污染，用高精度超声风速仪替代温度脉动仪测量折射率结构常数。模式主要输入的参数有气温、地表面温度、湿度、风速及测量点高度。结果表明：运用Bulk方法估算折射率结构常数是可行的，相似性函数分别采用Frederickson公式与Thiermann公式，差别不大；直接测量海面上折射率结构常数比较困难，通过输入海表面温度、海面上的粗糙度长度以及适合的相似性函数，可用于估算海面上的折射率结构常数。

Estimating the refractive index structure parameter within atmospheric surface layer

A model of atmospheric boundary layer,which has adopted Bulk method,is used to estimate the refractive index structure parameter in southeast seashore and Hefei.A high resolution three dimensional sonic anemometers was used instead of micro-thermal probes to compute the refractive index structure parameter.This avoids sea salt contaminating metal wire.The main input parameters are air temperature,surface temperature,humidity,wind speed and the measurement height of these variables.Analysis shows that applying Bulk method model to estimate the refractive index structure parameter is feasible.Meanwhile,applying Frederickson's formula or Thiermann's formula for empirically determining Monin-Obukhov similarity functions have little difference.It is difficult to get the refractive index structure parameter data directly over sea,however,which can be estimated after inputting sea surface temperature,roughness parameter and proper similarity functions into our model.