ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Analysis of a Cold front strong wind at Guanghan Airport Based on Doppler Wind Lidar
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Abstract:
Low-altitude flight activities are highly susceptible to complex wind fields, leading civil aviation meteorological departments to place significant emphasis on refined monitoring and early warning technologies for low-altitude winds. This study analyzes a cold front strong wind at Guanghan Airport on December 26, 2021, using Doppler wind lidar, airport automatic observation equipment, and reanalysis data. The results indicate that the Doppler wind lidar can clearly show that during the influence of cold air, surface strong winds occur approximately 4-6 hours after the low-level jet weakens, with significant non-uniformity in downward momentum transfer and vertical motion changes. Subsidence enhances the downward momentum transfer of the Low-level jet, resulting in increased surface wind speeds, while upward motion hinders downward momentum transfer, leading to intermittent surface strong winds. The 12° PPI scanning of the Doppler wind lidar can provide early warnings of potential strong winds along the glide path and at the surface 1-1.5 hours in advance. The intrusion of residual cold air behind the front caused a secondary wind event, which should be monitored when forecasting strong winds. This study demonstrates that Doppler wind lidar significantly enhances the monitoring precision of low-altitude wind field evolution, providing valuable insights for ensuring the safety and efficiency of low-altitude flight operations.
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