DOI: 10.1175/JCLI-D-17-0519.1
Scopus记录号: 2-s2.0-85047093783
论文题名: Contributions of different time-scale variations to tropical cyclogenesis over the western North Pacific
作者: Cao X. ; Wu R. ; Bi M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 8 起始页码: 3137
结束页码: 3153
语种: 英语
英文关键词: Atmosphere
; ENSO
; Pacific Ocean
; Statistical techniques
; Tropical cyclones
; Tropical variability
Scopus关键词: Earth atmosphere
; Hurricanes
; Storms
; Surface waters
; Tropics
; ENSO
; Pacific ocean
; Statistical techniques
; Tropical cyclone
; Tropical variability
; Oceanography
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 Niño developing and decaying JASO. The contribution of interannual variations of SST tends to be larger during El Niño decaying than during developing JASO. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111597
Appears in Collections: 气候减缓与适应
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作者单位: Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; International Laboratory on Climate and Environment Change and Key Lab. of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, China
Recommended Citation:
Cao X.,Wu R.,Bi M.. Contributions of different time-scale variations to tropical cyclogenesis over the western North Pacific[J]. Journal of Climate,2018-01-01,31(8)