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| 題 名 | 松山機場移動氣壓大波動與低空風切相關性之個案分析--西元2020年6月6日副熱帶高壓西伸型=Case Analysis of the Correlation between Large Moving Pressure Fluctuations and Low-level Wind Shear at Songshan Airport--Westward Extending of the Subtropical High Pressure on June 6, 2020 |
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| 作 者 | 蒲金標; | 書刊名 | 飛航天氣 |
| 卷 期 | 42 2024.10[民113.10] |
| 頁 次 | 頁1-19 |
| 分類號 | 447.56 |
| 關鍵詞 | 低空風切警告系統; 自動觀測系統; 固定10秒氣壓大波動; 移動10秒氣壓大波動; 2×2列聯表和量化指標; Low-altitude wind shear alert system; Automatic weather observation system; Fixed 10-second large pressure fluctuation; Moving 10-second large pressure fluctuation; 2×2 contingency table and quantitative indicators; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本文使用 2020 年 6 月 6 日副熱帶高壓西伸型松山機場低空風切 警告系統(LLWAS—III)之風切警告(Wind Shear Alert,WSA)和機場自 動天氣觀測系統(Automatic Weather Observation System,AWOS)之氣 壓等資料,以移動氣壓大變動(Large Pressure Fluctuation,LPF)分析機 場低空風切,獲得重要成果,機場吹強風,R28(東邊跑道頭)風速略 大於 R10(西邊跑道頭)風速,且 R28 發生強風 20kt 以上次數(2085 次) 大於 R10 發生次數(611 次) ,概因機場受地形影響,同一時間跑道兩 頭風速不同,造成風切現象,兩端的風速差是造成風切的主要原因之 一。WSA 發生 25 次是固定 10 秒 LPF 發生 6 次的 4.1 倍。而 WSA 發生 25 次與移動 LPF 發生 25 次相同。移動 LPF 發生 25 次是固定 10 秒 LPF 發生 6 次的 4.1 倍且更接近 WSA 發生階段。以量化指標評 估移動-LPF 和 WSA 之相關性,其準確率、精確率、召回率和 F1-分 數大幅提升。移動-LPF 可以改善與 WSA 發生之相關性,藉以移動 -LPF 作為機場 WS 檢測的輔助或替代方法,從而提高全球航空安全 做出積極貢獻。 |
| 英文摘要 | This study was based on the wind shear alert (Wind Shear Alert, WSA) data of the Songshan airport Low-level Wind Shear Alert System (LLWAS-III) and the pressure data of the airport Automatic Weather Observation System (AWOS) observed from the westward-extending subtropical high pressure on June 6, 2020. The moving Large Pressure Fluctuation (LPF) data derived from the above data were used to analyze low-level wind shear at the airport and resulted in important conclusions. Strong winds blew at the airport, and the wind speed at the East end of the runway (R28) was slightly higher than that at the West end of the runway (R10). The number of strong winds exceeding 20kt at R28 (2085 times) was greater than that at R10 (611 times). This was probably due to the effect of the surrounding terrains. The wind speeds at each end of the runway are different, when measured simultaneously, resulting in wind shear. The wind speed differential is one of the main causes of wind shear. The number of WSA occurrences is 4.1 times that of the fixed 10-second LPF. The number of WSA occurrences of 25 times is the same as that of the moving LPF. The number of occurrences of moving LPF is 4.1 times that of fixed 10-second LPF and is in proximity to the WSA occurrence stage. Quantitative indicators are used to evaluate the correlation between the moving-LPF and WSA, and its accuracy, precision, recall and F1-score are significantly improved. The moving-LPF can improve the correlation with WSA occurrence, so that the moving-LPF can be used as an auxiliary or alternative method for the airport WS detection, thereby making a positive contribution to the improvement of global aviation safety. |
本系統中英文摘要資訊取自各篇刊載內容。