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題 名 | 民國83年颱風調查報告--弗雷特颱風(9415)=Report on Typhoon Fred of 1994 |
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作 者 | 蔡甫甸; | 書刊名 | 氣象學報 |
卷 期 | 42:2 1998.06[民87.06] |
頁 次 | 頁184-200 |
分類號 | 328.55 |
關鍵詞 | 弗雷特颱風; |
語 文 | 中文(Chinese) |
中文摘要 | 本報告針對弗雷特(FRED)颱風發生的經過、路徑、侵臺時風雨及氣壓變化情形和 預報路徑的校驗作分析探討。 弗雷特颱風在民國 83 年 8 月 15 日 0600UTC 於關島北北西方海面( 18.1 ° N, 141.4 ° E )形成後,以偏西至西北西方向移動朝臺灣東部海面而來, 其強度則持續增強,最高 達到強烈颱風的程度。當其接近臺灣東部海面時則略向北移,經臺灣東北部海面時再轉向西 北移行,於登陸大陸後隨即迅速減弱。 由弗雷特颱風侵臺時的風雨分析顯示,由於其接近臺灣東部海面時略為偏北移動,使北部及 東北部所受影響程度稍減,而最大風速和最低氣壓都在彭佳嶼氣象站出現,其中瞬間最大風 速達到 53.2m/s,最低氣壓為 963.0 百帕,北部山區則雨量最多, 其中竹子湖累積雨量達 311.0 公厘。另外,弗雷特颱風侵襲期間,臺灣東南部地區曾有焚風現象發生。 從路徑預報校驗分析顯示,中央氣象局( CWB )的 24 小時預報平均誤差在 143 公里左右 ,其中預報誤差較大的部分出現在弗雷特颱風接近臺灣東部海面並轉而偏北移動之時。 |
英文摘要 | This article deals with the formation process, the moving path, the distribution of winds and rainfall, the pressurevariation, and the verifications of forecast tracks for Typhoon Fred. Fred took its shape to the north-northwestern sea area of Guam around 0600 UTC 15 August 1994. At the preliminary stage, it moved with a pro-westward to west-northwestward direction toward the eastern sea area of Taiwan, and with an increasing intensity to the level of intense typhoon. As approaching the eastern Taiwn sea area, it gradually changed to a northward course, passed through the northeastern sea area of Taiwan, then turned northewstward and landed on Mainland China and finally weakened to a tropical depression repidly. According to the distributions of winds and rainfall caused by Typhoon Fred, it was due to the northward-heading as it reached the eastern sea area of Taiwan. The northern and northeastern parts of Taiwan were free from the most severe influence. Therefore, the maximum wind speeds and the lowest pressure measured accurred in Pengchiayu with a instantaneous maximum-wind-speed value of 53.2m/s, the lowest pressure value of 963.0hPa, and the most abundant rainfall amount in the northern mountain range with an accumulated value of 331 mm. Besides, during Fred's invasion, fohen accurred in southeastern Taiwan. Verification of the typhoon track forecasts showed that the 24-hour forecast error of the Central Weather Bureau was about 143km; and the larger error was due to the recurving process of typhoon Fred as it approached the sea east of Taiwan. |
本系統中英文摘要資訊取自各篇刊載內容。