Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3504-x |
Role of scale interactions in the abrupt change of tropical cyclone in autumn over the Western North Pacific | |
Hsu, Pang-Chi1; Lee, Ting-Hui2; Tsou, Chih-Hua3; Chu, Pao-Shin4; Qian, Yitian1; Bi, Mingyu1 | |
2017-11-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Taiwan; USA |
英文摘要 | Tropical cyclone (TC) activity in autumn (September-November) over the western North Pacific experienced an abrupt change in 1998, which can be detected by the Bayesian change-point analysis. During the decade before the regime shift (1988-1997), the occurrence frequency of TC genesis increased significantly over the tropical western Pacific, where the seasonal cyclonic flow, intraseasonal oscillation (ISO) and synoptic-scale eddy (SSE) were all strengthened, compared to those observed in the decade after 1998 (1998-2007). The TC trajectories also exhibited spatial differences. During the active decade, the TCs had a higher probability to move westward into the Philippine Sea and the South China Sea, and recurved northeastward toward the east of Japan. Meanwhile, the northwestward propagating TCs approaching Taiwan and southeastern coast of China were reduced. To understand the role of mean flow-ISO-SSE interaction in the decadal changes of SSE and associated TC activity, we diagnosed a newly proposed SSE kinetic energy (KE) equation that separates the contributions of seasonal-mean circulation and ISO to the SSE. The results show that, during the active TC decade, the SSE obtained higher KE from both mean flow and ISO through eddy barotropic energy conversion when the enhanced SSE momentum flux interacted with the strengthened monsoon trough and vigorous ISO cyclonic anomaly over the western tropical Pacific. The increased SSE KE contributed positively to the increased TC genesis over the main genesis region (7.5A degrees-20A degrees N, 130A degrees-170A degrees E). It also benefited the growth of TCs over the Philippine Sea and the South China Sea during the active decade. The decadal change in TC frequency over the extratropics was related to the eddy baroclinic energy conversion instead of the barotropic conversion associated with scale interaction. During the active TC decade, SSE gained more (less) KE from the SSE available potential energy over the east of Japan (the East China Sea), favoring (disfavoring) the succeeding development of TCs in this region. |
英文关键词 | Tropical cyclone in autumn Abrupt change Scale interaction Eddy kinetic energy diagnosis |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414153800014 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; INTRASEASONAL OSCILLATIONS ; INTERDECADAL CHANGE ; DECADAL VARIATIONS ; SUMMER MONSOON ; ENSO EVENTS ; LATE 1990S ; EL-NINO ; PART I ; DISTURBANCES |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35220 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Joint Int Res Lab Climate & Environm Change, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster,Minist Educ, Nanjing, Jiangsu, Peoples R China; 2.Natl Sci & Technol Ctr Disaster Reduct, Taipei, Taiwan; 3.Natl Taiwan Normal Univ, Dept Earth Sci, Taipei, Taiwan; 4.Univ Hawaii, Sch Ocean & Earth Sci & Technol, Dept Atmospher Sci, Honolulu, HI 96822 USA |
推荐引用方式 GB/T 7714 | Hsu, Pang-Chi,Lee, Ting-Hui,Tsou, Chih-Hua,et al. Role of scale interactions in the abrupt change of tropical cyclone in autumn over the Western North Pacific[J]. CLIMATE DYNAMICS,2017,49. |
APA | Hsu, Pang-Chi,Lee, Ting-Hui,Tsou, Chih-Hua,Chu, Pao-Shin,Qian, Yitian,&Bi, Mingyu.(2017).Role of scale interactions in the abrupt change of tropical cyclone in autumn over the Western North Pacific.CLIMATE DYNAMICS,49. |
MLA | Hsu, Pang-Chi,et al."Role of scale interactions in the abrupt change of tropical cyclone in autumn over the Western North Pacific".CLIMATE DYNAMICS 49(2017). |
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