Contrasting Various Metrics for Measuring Tropical Cyclone Activity

文化大學機構典藏 CCUR > 理工學院 > 理學院 > 大氣系所 > 期刊論文 > Item 987654321/24230

請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/24230

題名:	Contrasting Various Metrics for Measuring Tropical Cyclone Activity
作者:	Yu, JY (Yu, Jia-Yuh) Chiu, PG (Chiu, Ping-Gin)
貢獻者:	Dept Atmospher Sci
關鍵詞:	Tropical cyclone activity Climate variability Modified Rankine vortex
日期:	2012-06
上傳時間:	2013-02-20 15:41:57 (UTC+8)
摘要:	Popular metrics used for measuring the tropical cyclone (TC) activity, including NTC (number of tropical cyclones), TCD (tropical cyclone days), ACE (accumulated cyclone energy), PDI (power dissipation index), along with two newly proposed indices: RACE (revised accumulated cyclone energy) and RPDI (revised power dissipation index), are compared using the JTWC (Joint Typhoon Warning Center) best-track data of TC over the western North Pacific basin. Our study shows that, while the above metrics have demonstrated various degrees of discrepancies, but in practical terms, they are all able to produce meaningful temporal and spatial changes in response to climate variability. Compared with the conventional ACE and PDI, RACE and RPDI seem to provide a more precise estimate of the total TC activity, especially in projecting the upswing trend of TC activity over the past few decades, simply because of a better approach in estimating TC wind energy. However, we would argue that there is still no need to find a "universal" or "best" metric for TC activity because different metrics are designed to stratify different aspects of TC activity, and whether the selected metric is appropriate or not should be determined solely by the purpose of study. Except for magnitude difference, the analysis results seem insensitive to the choice of the best-track datasets.
關聯:	TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES 卷: 23 期: 3 頁數: 303-316
顯示於類別:	[大氣系所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	481	檢視/開啟

檢視Licence

在CCUR中所有的資料項目都受到原著作權保護.

資料載入中.....