银川河东机场风切变预报指标探究

Exploration of Wind Shear Forecast Indicators at Yinchuan Hedong Airport

摘要: 本文利用常规观测资料和多普勒雷达资料对河东机场气象用户关注的风向转换、季节性大风及雷暴大风三种常见的风切变类型选取典型个例进行分析，总结出：(1) 当预计未来10分钟内风速 ≥ 5 M/S，且风向变化 ≥ 90˚时，需发布风切变机场警报。(2) 对于大风天气，当预计风速 ≥ 8 M/S，且未来10分钟内风速增大或减小≥5 m/s时，发布风切变机场警报。(3) 雷暴天气背景下风切，当预计机场跑道正侧风 ≥ 10 m/s，700或850 hPa风速16 m/s时，发布风切变机场警报。

Abstract: This article uses conventional observation data and Doppler radar data to analyze three com-mon types of wind shear that meteorological users at Hedong Airport are concerned about: wind direction conversion, seasonal strong winds, and thunderstorm strong winds. Typical cases are selected for analysis, and it is summarized that: (1) when the wind speed is expected to ≥ 5 m/s and the wind direction change is ≥90˚ in the next 10 minutes, the wind shear airport warning needs to be issued. (2) For windy weather, when the wind speed is expected to ≥ 8m/s, and the wind speed increases or decreases by ≥5 m/s in the next 10 minutes, a wind shear airport alert is issued. (3) Wind shear in the background of thunderstorm weather, when the positive side wind of the airport runway is expected to ≥10 m/s, and the wind speed of 700 or 850 hPa is 16 m/s, the wind shear airport alert will be issued.