The Civil Aeronautics Administration of Taiwan is cooperating with NCAR to conduct a project to establish the Advanced Operational Aviation Weather System (AOAWS). One of the major objectives is to implement Low-Level Windshear Alert Systems (LLWAS) at three busy airports. This study is to categorize the primary type of the low-level wind shear near Sungshan airport and to understand what the major corresponding forcing mechanisms could be before the LLWAS is implemented. According to the analysis of the 2-year data from Automatic Surface Observing System (ASOS), the summer convection in the afternoon plays a very important role for the occurrence of low-level wind shear near Sungshan airport. The analysis shows that 53.7% of low-level windshear were detected between 12:00 and 18:00 local time. Besides, the statistics shows that the windshear threshold is reached in a significant ratio of time in July 1996, compared to the rest of 23 months. The reason for that is because there were two typhoons invading Taiwan during that month. Therefore, it may be reasonable to conclude that most of the low-level wind shear near Sungshan airport is due to summer thunderstorm or typhoon
The 8th Conference on Aviation, Range, and Aerospace Meteorology