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題 名 | 大尺度環流剖面結構之年際變化與臺灣梅雨之活躍度 |
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作 者 | 陳泰然; 周仲島; | 書刊名 | 大氣科學 |
卷 期 | 17:3 1989.09[民78.09] |
頁 次 | 頁223-236 |
分類號 | 328.63 |
關鍵詞 | 大尺度; 年際變化; 剖面結構; 梅雨; 臺灣; 環流; |
語 文 | 中文(Chinese) |
中文摘要 | 本文利用NCAR網格點資料,分析1975-1984年臺灣梅雨期(5月15日-6月15日)大尺度環流之剖面結構,並探討其年際變化與梅雨活躍度之相關。結果顯示,副熱帶太平洋高壓之強度與位置,為決定臺灣梅雨活躍度之先決條件。而中緯度冷空氣南侵以維持梅雨鋒面,為決定梅雨活躍度之必要條件。東亞梅雨區哈德里胞在梅雨顯著時較強,顯著有較強之中低緯度交互作用。此外,並發現梅雨區大氣屬正壓穩定狀態,擾動若有發展,正壓不穩定過程顯然並不重要。 |
英文摘要 | NCAR grid point data were used to analyze the cross sectional structure of the large-scale circulations for the Taiwan Mei-Yu season (May 15-June 15) of 1975-1984. The interannual variations of the large-scale circulations and the Mei-Yu rainfalls were also investigated. Results showed that the prerequisite condition for the Mei-Yu activities was the intensity of subtropical Pacific high over the Mei-Yu area. It was also found that the intrusion of the midlatitude cold air was a necessary condition for having an active Mei-Yu season. The local Hadley circulation was stronger over the East Asia for the more active Mei-Yu season. Thus, the more active interactions between the lower- and middle-latitude circulations will be expected. Finally, the atmosphere over Mei-Yu area was found to be barotropically stable. Should the disturbance develop, the barotropic process would not be important. |
本系統中英文摘要資訊取自各篇刊載內容。