FC-Ⅲ型激光雷达对一次逆温层引起低空风切变的监测研究

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Abstract In order to study the structure and evolution characteristics of low-level wind shear caused by inversion layer in Yinchuan Airport,the NCEP reanalysis data,ground automatic observation system and FC-Ⅲ type wind Lidar were used to analyze the wind field structure of a typical low-level wind shear caused by inversion layer in Yinchuan Airport,which caused the aircraft to go around.The results indicate that the inversion layer formed by ground radiation cooling quickly disappeared after the temperature surge.The inversion layer shows significant differences in wind direction and speed within different distance circles on the Lidar PPI mode scanning image,as well as a layered structure features with different cooling and heating properties of the air layer at different heights.In both the DBS detection mode and RHI detection mode of the Lidar,it can be seen that the inversion layer isolates the momentum transfer in the upper and lower layers of air,resulting in discontinuous wind direction and speed in the vertical direction.The Lidar GP mode presents the headwind tailwind shear faced by the aircraft during takeoff and landing when crossing the inversion layer.The low-level wind shear detected by the Lidar is consistent with the information detected by the aircraft's onboard equipment,which can provide a basis for civil aviation forecasting and early warning of low-level wind shear.

Key words： inversion layer low-level wind shear Yinchuan Airport aviation safety

Received: 30 May 2025

ZTFLH:	TN958.98
	P412.25

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	Articles by authors
	Li Tao
	Bai Hanbing
	Pan Jia

Cite this article:

Li Tao,Bai Hanbing,Pan Jia. Monitoring of low-level wind shear caused by a emperature inversion layer with FC-Ⅲ lidar[J]. Meteorological Hydrological and Marine Instrument, 2025, 42(6): 74-78.

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http://www.qxswhy.com/EN/ OR http://www.qxswhy.com/EN/Y2025/V42/I6/74

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