Zheng Xuanyu, Li Xueming, Chang Qihai
Xizang Minzu University, Xianyang, 712000, China.
Zigong Meteorological Office, Zigong, 643000, China.
Sci Rep. 2024 Nov 18;14(1):28451. doi: 10.1038/s41598-024-79959-y.
Monostatic Rayleigh Lidar is mainly used for the observation of the middle atmosphere temperature and vertical activity of gravity waves. It was thought that it could not be used for the study of the gravity waves horizontal activity. Through the area integration of gravity waves that vary with time and space, it is derived that the echo signal received by the Lidar contains the horizontal wavenumber information, which proves that the monostatic Rayleigh Lidar can realize the estimation of horizontal activity of gravity waves. The feasibility is verified by using the Rayleigh Lidar observation data from the Yanqing Observatory of the Chinese Academy of Sciences. This method is suitable for the short scale horizontal activity observation of gravity waves. To improve the observation reliability of this method, it is necessary to make the Rayleigh Lidar have a reasonable divergence angle, narrow linewidth laser, and higher vertical spatial resolution.
单基地瑞利激光雷达主要用于中层大气温度观测和重力波的垂直活动。过去认为它不能用于重力波水平活动的研究。通过对随时间和空间变化的重力波进行面积积分，推导出激光雷达接收到的回波信号包含水平波数信息，这证明了单基地瑞利激光雷达可以实现重力波水平活动的估计。利用中国科学院延庆观测站的瑞利激光雷达观测数据验证了该方法的可行性。该方法适用于重力波短尺度水平活动观测。为提高该方法的观测可靠性，有必要使瑞利激光雷达具有合理的发散角、窄线宽激光器以及更高的垂直空间分辨率。
