DOI: 10.1002/joc.5220
论文题名: Modulation of convectively coupled equatorial Rossby wave on the western North Pacific tropical cyclones activity
作者: Zhao H. ; Wu L.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 2 起始页码: 932
结束页码: 948
语种: 英语
英文关键词: convectively coupled equatorial Rossby wave
; genesis potential index
; intra-seasonal time scale
; tropical cyclone activity
; western North Pacific
Scopus关键词: Budget control
; Hurricanes
; Modulation
; Storms
; Tropics
; Equatorial Rossby waves
; Genesis potential index
; Time-scales
; Tropical cyclone activity
; Western North Pacific
; Mechanical waves
; climate prediction
; convective system
; equatorial dynamics
; observational method
; Rossby wave
; storm track
; timescale
; tropical cyclone
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The convectively coupled equatorial Rossby waves (ERWs) how to quantitatively modulate the western North Pacific (WNP) tropical cyclones (TCs) are investigated systematically from observations in this study. Our results show that ERWs can exert a distinct modulation on the WNP TC genesis by altering large-scale conditions and thus significantly impact on the TC tracks and basin-wide TC intensity. During the convectively active ERW phase, more TCs and larger daily genesis rate (DGR) can be observed, while fewer TCs and lower DGR are found during the convectively inactive ERW phase. Such changes are mainly attributed to changes of large-scale parameters modulated by ERWs over the WNP. Budget terms of the total anomalous observed genesis potential index (GPI) indicate that the mid-level relative humidity and low-level vorticity are the two largest contributors to ERWs-composited GPI anomalies. Similar results are further obtained by analyses of the pattern correlations between the total anomalous GPI associated with ERWs and the anomalous GPI with varying environmental factors. Moreover, more TCs with north-westward tracks and more intense TCs over the WNP can be generally found during the convectively active phases of ERWs in contrast to that during the convectively inactive phases. This study enhances our understanding of intra-seasonal variability of WNP TC activity and has a substantial implication for its sub-seasonal prediction. © 2017 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117101
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Meteorological Disaster of the Ministry of Education, Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; Pacific Typhoon Research Center, Earth System Modelling Center, Nanjing University of Information Science and Technology, Nanjing, China
Recommended Citation:
Zhao H.,Wu L.. Modulation of convectively coupled equatorial Rossby wave on the western North Pacific tropical cyclones activity[J]. International Journal of Climatology,2018-01-01,38(2)