台灣冬夏季季風及短期氣候變遷研究

Short-term climate changes associated with the monsoon flow over Taiwan

本文使用中央氣象局百年測站資料來分析台灣短期氣候特徵。多數測站在20世紀皆呈現氣溫上升之趨勢，其增溫率夏季約0.0133℃／年比冬季約0.0102℃／年快。氣壓資料顯示夏季增溫與西南季風增強有密切關係，而冬季則此二者關聯較不明顯。經由分段30年氣候分析後發現20世紀前期（1911－1940）增溫與季風強弱關係較不明確。由此推論季風強弱不必然決定增溫與否，其他因子如熱島效應與台灣附近暖海水也可能影響增溫。

This study examines the warming trend over Taiwan for the past century using data from the Central Weather Bureau. Temperature records show the summer warming rate of 0.0133℃/year is higher than the winter warming rate 0.0102/year. The summer warming appears to be related to the tightening of the pressure gradient corresponding to the southeasterly monsoon, whereas this relationship is not so significant for the winter. After examining the three consecutive 30-year periods, there appear to be other factors affecting the climate change.