Abstract：By analyzing the situation of the weather circulation of the low-level wind shear day of Yanji Chaoyangchuan International Airport from 2019 to 2023 and the difference between the airport surface wind and 850 hPa,it is concluded that 83% of the wind shear appears near the bottom line of the cold vortex of 500 hPa,and 17% of the wind shear appears near the high-level trough line of 500 hPa,which is generally generated under the pressure field situation of "high in the south and low in the north".83% of the wind shear on the ground map is within the atmospheric pressure gradient zone between high and low pressures,and 17% of the wind shear appeared on the ground average pressure field.When different ground situations cause a large difference between the surface wind direction and the wind direction or wind speed of 850 hPa layer,the flight is easy to encounter low altitude wind shear at the falling height or rising height.
2024, Vol. 41 
