Climatic Variation of Maximum Intensification Rate for Major Tropical Cyclones over the Western North Pacific

被引:3
|
作者
Wu, Xiangbai [1 ,2 ,3 ,4 ,5 ]
Yan, Xiao-Hai [1 ,2 ,3 ,4 ]
Li, Yan [1 ,2 ]
Mei, Huan [5 ]
Liou, Yuei-An [6 ]
Li, Gen [7 ,8 ]
机构
[1] Xiamen Univ, Dongshan Swire Marine Stn, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
[2] Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361005, Peoples R China
[3] Univ Delaware, Coll Earth Ocean & Environm, Newark, DE 19716 USA
[4] Univ Delaware Xiamen, Joint Inst Coastal Res & Management, Xiamen 361005, Peoples R China
[5] Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212100, Jiangsu, Peoples R China
[6] Natl Cent Univ, Ctr Space & Remote Sensing Res, Taoyuan 32001, Taiwan
[7] Hohai Univ, Coll Oceanog, Key Lab Marine Hazards Forecasting, Minist Nat Resources, Nanjing 210098, Peoples R China
[8] Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China
基金
中国国家自然科学基金;
关键词
maximum intensification rates; tropical cyclone; western North Pacific; El Nino/Southern Oscillation; Pacific Decadal Oscillation; OCEAN THERMAL STRUCTURE; RAPID INTENSIFICATION; EASTERN PACIFIC; PART I; ATLANTIC; INTENSITY; TYPHOONS; PREDICTION;
D O I
10.3390/atmos12040494
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To analyze the dependence of intensification rates of tropical cyclones (TCs) on the variation of environmental conditions, an index is proposed here to measure the lifetime maximum intensification rates (LMIRs) for the Saffir-Simpson scale category 4-5 TCs over the western North Pacific. To quantitatively describe the intensification rate of major TCs, the LMIR is defined as the maximum acceleration in the sustained-wind-speed over a 24-h period of an overwater TC. This new index, LMIR, is generally independent of the indices for RI frequency. The results show that the Pacific Decadal Oscillation (PDO) modulates the inter-annual relationship between the LMIR and El Nino/Southern Oscillation (ENSO). The PDO's modulation on the ENSO's effect on the LMIR is explored here by considering the relationship between the LMIR and the environmental conditions in different PDO phases. While the ENSO's effect on the LMIR for the warm PDO phase is generally by affecting the variations of upper ocean heat content, ENSO mainly influences the variations of zonal wind and vertical wind shear for the cold PDO phase. Our results suggest that fast translating TCs tend to attain strong intensification during the warm PDO phase, while a warm subsurface condition may permit slow-translating TCs also to become strongly intensified during the cooling PDO phase. These findings have an important implication for both prediction of RI and the long-term projection of TC activities in the western North Pacific.
引用
收藏
页数:14
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