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適合西北太平洋海域之颱風生成潛在指數

A Typhoon Genesis Potential Index for Western North Pacific

摘要


本研究以早期美國學者依曼紐-諾藍(Emanuel and Nolan 2004)提出之颱風生成潛在指數(Genesis Potential Index, GPI)及後續依曼紐以濕熵差取代相對濕度之改進版本χGPI指數(Emanuel 2010)為基礎,提出一個更適合推估西北太平洋海域颱風活動變化趨勢之χMqGPI指數。我們利用美國國家海洋大氣管理局提供之颱風最佳路徑資料以及歐洲中期天氣預報中心之大氣海洋再分析資料,詳細診斷分析χMqGPI指數優於GPI和χGPI指數之原因。

並列摘要


Based on the early study of Emanuel and Nolan's (2004) original genesis potential index (GPI) and the Emanuel's (2010) revised version (χGPI), in which the relative humidity term was replaced by moist entropy deficit, we proposed a new typhoon genesis potential index (χMqGPI) designed specifically for the western North Pacific basin. We utilized the NOAA's best-track typhoon data and ECMWF's atmospheric reanalysis data to demonstrate the advantage of χMqGPI over the western North Pacific in comparison with GPI and χGPI.

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