Characteristics of Vertical Wind Perturbations in the Mesopause Region Based on Lidar Measurements and Dynamic Simulations ormalsize

A total of 82h vertical wind and zonal wind profile data obtained by the Na fluorescence Doppler lidar at Langfang observatory of National Space Science Center, are used to simulate the vertical wind perturbations by using the polarization and dispersion relation of 3D quasi-monochromatic gravity wave. The observation data show that, including the measurement error, the perturbation magnitude of vertical wind and horizontal wind is about 10m·^-1, and the perturbations of vertical wind are much larger than those of the background vertical wind. The mean background vertical wind is -0.015m·^-1. According to the different frequency, the gravity waves are divided into high, medium and low frequency waves. In the conditions of short period and large zonal wind perturbations, the vertical wind perturbations induced by high frequency gravity wave can reach 10m·^-1, and the vertical wind perturbations induced by medium frequency gravity wave is less than 10m·^-1, the vertical wind perturbations induced by low-frequency gravity waves is less than 1m·^-1. The results indicate that the quasi-monochromatic gravity wave is capable of producing 10m·^-1 vertical wind perturbations. In conclusion, 10m·^-1 vertical wind perturbations measured by the Na fluorescence Doppler lidar at Langfang station agree with theoretical results. The study can provide theoretical basis for measuring and simulating of vertical wind, and gravity wave parameterizations.