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DOI10.1175/JCLI-D-17-0519.1
Contributions of Different Time-Scale Variations to Tropical Cyclogenesis over the Western North Pacific
Cao, Xi1; Wu, Renguang1,2; Bi, Mingyu3,4
2018-04-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2018
卷号31期号:8
文章类型Article
语种英语
国家Peoples R China
英文摘要

The present study investigates relative contributions of different time-scale variations of environmental factors to the tropical cyclone (TC) genesis over the western North Pacific (WNP) during July-August-September-October (JASO). Distinct from previous studies that are concerned with large-scale spatial patterns during a certain period, the present study focuses on local and instantaneous conditions of the TC genesis. Analysis shows that the contribution of convection and lower-level vorticity to the TC genesis is mainly due to intraseasonal and synoptic variations. The contribution of vertical wind shear is largely related to synoptic variations. The contribution of midlevel specific humidity is almost 2 times more from intraseasonal variations than from synoptic variations. The contribution of sea surface temperature (SST) to the TC genesis is mainly due to interannual and intraseasonal variations. The barotropic energy for synoptic-scale disturbances during the TC genesis comes mainly from climatological mean flows over the southwest quadrant and from intraseasonal wind variations over the northeast quadrant of the WNP, respectively. The contribution of interannual variations to the TC genesis is enhanced over the southeast quadrant of the WNP. More TCs form under weak easterly and westerly vertical shears, respectively, during El Nino developing and decaying JASO. The contribution of interannual variations of SST tends to be larger during El Nino decaying than during developing JASO.


英文关键词Atmosphere Pacific Ocean ENSO Tropical cyclones Statistical techniques Tropical variability
领域气候变化
收录类别SCI-E
WOS记录号WOS:000428694000010
WOS关键词MADDEN-JULIAN OSCILLATION ; CYCLONE ACTIVITY ; PART I ; INTRASEASONAL OSCILLATION ; MONSOON TROUGH ; GENESIS ; ENSO ; SST ; VARIABILITY ; SUMMER
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
被引频次:40[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/19779
专题气候变化
作者单位1.Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, Beijing, Peoples R China;
2.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China;
3.Nanjing Univ Informat Sci & Technol, Int Lab Climate & Environm Change, Nanjing, Jiangsu, Peoples R China;
4.Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714
Cao, Xi,Wu, Renguang,Bi, Mingyu. Contributions of Different Time-Scale Variations to Tropical Cyclogenesis over the Western North Pacific[J]. JOURNAL OF CLIMATE,2018,31(8).
APA Cao, Xi,Wu, Renguang,&Bi, Mingyu.(2018).Contributions of Different Time-Scale Variations to Tropical Cyclogenesis over the Western North Pacific.JOURNAL OF CLIMATE,31(8).
MLA Cao, Xi,et al."Contributions of Different Time-Scale Variations to Tropical Cyclogenesis over the Western North Pacific".JOURNAL OF CLIMATE 31.8(2018).
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