测风激光雷达大气风场反演方法研究及风场的初步应用

A wide variety of techniques have been used to study atmospheric gravity waves. They can be split into three major categories: ground-based remote sensing, satellite-based remote sensing and in situ measurement. The ground-based remote sensing especially lidars and radars are widely used to obtain the atmospheric gravity waves information. Especially Doppler wind lidar which can provide detail information of wind filed as a function of height and time are very helpful in study the behavior gravity waves. In the University of Science and Technology of China, a new Doppler wind lidar is setted up recently. In this research, we first focus on the data processing method of the wind lidar data, then use the retrieved wind field together with Mie-Rayleigh-Na lidar data, radar data and balloon data in the same place to study the behavior of the gravity waves in Hefei area.

高精度的中高层大气风场观测数据对于重力波等波动的研究具有重要意义，同时精准的大气空间风场分布资料可以提高对大气环境变化的预测能力和数值天气预报的准确性。由于多普勒测风激光雷达具有精细的空间和时间分辨率以及高测量精度，因而被广泛的应用于大气风场的探测。本项目的研究工作围绕着中国科学技术大学新近建成的多普勒测风激光雷达展开，首先进行多普勒激光雷达的实时降噪信号处理技术的研究，确保实时、高效、准确的反演出大气风场，并通过理论计算和联合观测对比实验（风廓线雷达、探空气球）验证该算法的有效性；随后利用高精度水平风场资料结合Mie-Rayleigh-Na荧光激光雷达观测资料对重力波的传播规律、动力学特性等进行深入的研究。

高精度的中高层大气风场观测数据对于重力波等波动的研究具有重要意义，同时精准的大气空间风场分布资料可以提高对大气环境变化的预测能力和数值天气预报的准确性。本项目的研究工作围绕着中国科学技术大学的多普勒测风激光雷达展开，确定并分析了实时、高效、准确大气风场反演方法，并通过理论计算和联合观测对比实验（风廓线雷达、探空气球）验证该算法的有效性；利用cosmic卫星温度剖线分析全球平流层大气重力波的分布特征；利用瑞利钠激光雷达获得了具有潮汐相位结构特征的热层钠原子层的观测。