利用數值天氣模式模擬初步分析台灣東部個案：2017年6月10日凌天航空事故

本文以數值天氣模式模擬重建風場四維資料，分析發生於2017年6月10日台灣東部花蓮豐濱鄉之直昇機事故。模式模擬結果與綜觀尺度觀測資料（包含探空、地面及衛星雲圖）呈現之低對流層南風非常類似，但與事故當時在場相關人員回報之東北東風10海浬/時風速則有顯著差異。既使在20公尺地形解析度與2-way feedback模式設定下，於海拔高度約637公尺可模擬出東北東風5海浬/時以下風場，但該四維風場之垂直風切（最大值約0.02 s^(-1)）仍遠低於0.067 s^(-1)之弱風切標準。

關鍵字

數值天氣模式；低對流層；重建四維風場；垂直風切

並列摘要

This study utilized the numerical weather model to simulate and re-construct four-dimensional wind for analyzing a helicopter crash event at FengBin near Hualian on June 10, 2017. Simulate results generally resemble the synoptic observations (such as sounding, surface and satellite), but are obviously different from the 10 knots east-northeasterly wind reported by rescue and local personnel. The model can simulate the 5 knots east-northeasterly wind at about 637 meters above sea level under the settings of 20 meter geographical data and 2-way domain feedback. Nevertheless, the maximum vertical wind shear (~0.02 s^(-1)) was far weaker than the light shear standard of 0.067 s^(-1).

並列關鍵字

Numerical Weather Model ； Lower Troposphere ； Reconstruct Four Dimensional Wind ； Vertical Wind Shear

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利用數值天氣模式模擬初步分析台灣東部個案：2017年6月10日凌天航空事故

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