近海面大气光学湍流计算模型的比较与改进

Comparison and Improvement of the Atmospheric Optical Turbulence Model in Near Sea Surface

通过在黄海北部某海域进行的海上大气光学湍流观测实验,对比分析了不同大气稳定度环境下四种大气光学湍流Cn2计算模型的性能。针对中性和近中性环境下模型误差大的问题,基于温度折射率结构参数fT与稳定度的对应关系,利用实测数据和函数拟合,提出了一个新的fT函数形式。误差分析表明采用新的fT参数方案明显提高了Cn2模型的计算精度,其性能大大高于其他几种计算模型。

Four atmospheric optical turbulenc models are analysed in different stability conditions through atmospheric optical turbulence trial in the Northern Yellow Sea. Focusing on the low precision of model in neutral and near neutral condition, a new form for temperature structure is developed based on the relation between fτ and stability; using trial data and data fitting, the new fτ function is proposed. The resul,.t of error analysis shows that the Cn^2 model considerably improves the precision using the new fτ function.