ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Speed comparison and analysis of wind lidar and Doppler weather radar
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Abstract:
Doppler weather radar is not only used for precipitation monitoring but also plays an important role in numerical weather prediction. The radial velocity of the weather radar can significantly improve the precipitation prediction ability of numerical models. However, the comparison between the radial velocity and the wind has not been carried out effectively due to the lack of comparison methods. The wind lidar can acquire high-precision wind field information. Therefore, the accuracy of radial velocity in weather radar can be analyzed by wind lidar. In this paper, the wind lidar is used to compare and analyze the radial velocity of Doppler weather radar. And it is found that Beijing Daxing weather radar in May 2023, has a mean value of 0.37 m/s of radial velocity difference, and a standard deviation of 3.66 m/s. Further research shows that the means of 23 days are within ±1 m/s, and the standard deviations of 25 days are less than 4 m/s. The results show that wind lidar can be used to detect velocity errors in weather radar caused by malfunctions. The research also showed that the radial velocities of the night-time weather radar clear-air echoes are representative of the wind field velocities and can be used in model assimilation.
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