DOI: 10.1175/JCLI-D-11-00643.1
Scopus记录号: 2-s2.0-84871917066
论文题名: Propagation and maintenance mechanism of the TC/submonthly wave pattern and TC feedback in the western North Pacific
作者: Ko K.-C. ; Hsu H.-H. ; Chou C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 24 起始页码: 8591
结束页码: 8610
语种: 英语
Scopus关键词: Atmospheric circulation
; Background flow
; Barotropic
; Barotropic structures
; Clustering effect
; Dominant process
; Intraseasonal oscillations
; Intraseasonal variability
; Lower troposphere
; Mean flow
; Optimal growth
; Tropical cyclone
; Tropical variabilty
; Wave patterns
; Western North Pacific
; Atmospheric thermodynamics
; Atmospherics
; Climatology
; Energy conversion
; Hurricanes
; Kinetic energy
; Kinetics
; Maintenance
; Vorticity
; Waves
; Tropical engineering
; atmospheric circulation
; atmospheric wave
; marine atmosphere
; seasonal variation
; tropical cyclone
; troposphere
; vorticity
; Pacific Ocean
; Pacific Ocean (North)
; Philippine Sea
英文摘要: Propagation and maintenance mechanisms of the tropical cyclone/submonthly wave pattern in the western North Pacific are explored. The wave pattern exhibited an equivalent barotropic structure with maximum vorticity and kinetic energy in the lower troposphere and propagated northwestward in the Philippine Sea in the intraseasonal oscillation (ISO) westerly phase and north-northeastward near the East Asian coast in the easterly phase. The mean flow advection played a dominant role in the propagation in both phases. Barotropic energy conversion is the dominant process in maintaining the kinetic energy of the pattern. The wave pattern tended to occur in the confluent zone between the monsoon trough and the anticyclonic ridge, where the kinetic energy could be efficiently extracted from the westerly mean flow associated with the monsoon trough. The individual circulation circuit embedded in the pattern was oriented northeast- southwest (east-west) to have optimal growth and propagation during the ISO westerly (easterly) phase. When tropical cyclones (TCs) developed in a development-favorable background flow provided by the submonthly wave pattern, they in turn enhanced the amplitudes of the vorticity and kinetic energy of the submonthly wave pattern by more than 50% and helped extract significantly more energy from the background ISO circulation. This TC feedback was much more significant in the ISO westerly phase because of the stronger clustering effect on TCs by the enhanced monsoon trough. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52101
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geography, National Kaohsiung Normal University, Kaohsiung, Taiwan; Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
Recommended Citation:
Ko K.-C.,Hsu H.-H.,Chou C.. Propagation and maintenance mechanism of the TC/submonthly wave pattern and TC feedback in the western North Pacific[J]. Journal of Climate,2012-01-01,25(24)