Reprint 574 激光雷达的风切变探测运算程序的发展及其在二零零四年.PDFVIP

Reprint 574 激光雷達的風切變探測運算程序的發展及 其在二零零四年八月二十八至三十日的風切變過程中的表現 黃秀霞、陳柏緯 第十九屆粵港澳氣象科技研討會， 中國，廣東陽江，2005 年 3 月1-3 日 雷切 零零年切 勒雷行 切 了 滑雷零零年 了滑滑切 論 零零年切 度 流 六切復 了 切 來 切雷滑 切 Development of LIDAR-based Windshear Detection Algorithm and its Performance in the Windshear Episode on 28 – 30 August 2004 S.H. Wong and P.W. Chan Hong Kong Observatory Abstract A Doppler LIDAR is used operationally at the Hong Kong International Airport (HKIA) for windshear alerting service. To monitor the headwind encountered by the aircraft along the glide paths of the airport, glide-path scans have been implemented on the LIDAR since mid-2004. The present paper introduces the windshear detection algorithm developed by the Observatory based on the glide-path scans. It will also discuss the performance of the algorithm in the windshear episode on 28 – 30 August 2004. On these three days, under the influence of strong southerly winds blowing across Lantau Island, the airflow was very much disturbed over the airport. There were altogether 69 aircraft reports of significant windshear and 11 missed approaches. Apart from typhoon days, this is the windshear episode with the largest number of aircraft reports in August since the opening of HKIA. The glide-path scans of the LIDAR are also found to reveal the transient and sporadic nature of the windshear in this episode. 1. 切 力北(