西北太平洋副熱帶高壓(以下簡稱副高)的強度及範圍影響東亞地區的天氣現象，如：春末夏初的副高西北側牽制著梅雨鋒面的位置並影響水氣傳送，夏季時的熱帶氣旋沿著副高邊緣前進。若能掌握好副高的變異性及先驅指標，就能對季節性預報有較直接的幫助。大尺度環流為影響副高強度的因素之一，可分成哈德里胞環流、沃克環流及季風環流三部分，本研究分析多組再分析資料討論各環流分量對副高強度的影響，同時利用CMIP6氣候模式檢驗在全球暖化下各環流的強度及趨勢變化。本研究使用200hPa速度位來量化環流。首先將速度位的緯向平均定義為哈德里胞環流，剩餘的偏差場再分為年平均值和季節週期，分別代表沃克環流及季風環流。研究中分為兩部分，第一部分分離熱帶大尺度環流—哈德里胞環流、沃克環流及季風環流，取該環流之速度位峰值得出時間序列後，比較各環流的年際變化及長期趨勢。第二部分將各環流之時間序列移除平均場後定義為環流指數，接著選定兩處研究範圍—臺灣地區(WPSH Taiwan)及北太平洋地區(NPSH)建立副高指數，並與各環流指數做相關分析及回歸分析，討論各環流對低層不同範圍的副高變異其貢獻程度差異多寡。研究結果顯示在北太平洋地區副高的環流貢獻量，再分析資料、歷史模擬資料以及SSP 5-8.5情境下未來推估模式資料主要環流貢獻皆為哈德里胞環流，分別占了55%、51%、44%，其次皆為沃克環流分別占了36%、35%、30%。接著比較在臺灣地區副高的環流貢獻量，再分析資料、歷史模擬資料以及SSP 5-8.5情境下未來推估模式資料的主要貢獻環流皆為哈德里環流，分別占了77%、89%、55%，其次的環流貢獻上再分析資料為沃克環流(21%)、歷史模擬資料及SSP 5-8.5情境則為季風環流分別占7%、30%。

吳宜昭、許晃雄、劉鵬、湯寶君、黃威凱、楊竣凱、周佳、隋中興(民101)，東亞/西北太平洋氣候變遷，大氣科學，頁215-247。
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