延吉朝阳川国际机场低空风切变成因分析  

Analysis of low-level wind shear at Yanji Chaoyangchuan International Airport

作　　者：马利柱 Ma Lizhu(Yanji Meteorological Team,Navigation Management Department,Jilin Airport Group,Yanji 133000)

机构地区：[1]吉林机场集团有限公司航务管理部延吉气象分队,延吉133000

出　　处：《气象水文海洋仪器》2024年第2期94-96,100,共4页Meteorological,Hydrological and Marine Instruments

摘　　要：通过分析延吉朝阳川国际机场2019—2023年低空风切变日的天气环流形势及机场地面风与850 hPa之间的风矢差异,得出结论:83%的风切变出现在500 hPa冷涡底部槽线附近,17%的风切变出现在500 hPa高空槽线附近,总体在“南高北低”的气压场形势下产生;地面图上83%的风切变在高低压之间大气压梯度区内,17%的风切变出现地面均压场;不同的地面形势场造成地面风向或风速与850 hPa层风向或风速有较大差值时,航班在下降高度或上升高度容易遭遇低空风切变。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.

关 键 词：低空风切变 环流形势 850 hPa和地面风矢 

分 类 号：V321.225[航空宇航科学与技术—人机与环境工程]