DOI: 10.1002/2016JD025562
论文题名: Tropical cyclone track direction climatology and its intraseasonal variability in the Australian region
作者: Lavender S.L. ; Dowdy A.J.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 22 起始页码: 236
结束页码: 249
语种: 英语
英文关键词: Australian region
; MJO
; tropical cyclones
Scopus关键词: climatology
; El Nino-Southern Oscillation
; Madden-Julian oscillation
; seasonal variation
; storm track
; tropical cyclone
; westerly
; wind direction
; zonal wind
; Australia
英文摘要: Aspects of tropical cyclone (TC) activity, such as the influence of the El Niño-Southern Oscillation and the variability of TC genesis location, have been examined in numerous previous studies. However, relatively few studies have examined aspects such as the influence of intraseasonal variability on TC track direction. Here we focus on a number of knowledge gaps relating to observed TC track directionality and intraseasonal variability in the Australian region. Climatological examinations are presented for TC track directional variability throughout the Australian region. In contrast to previous studies that have focused on the mean direction of TC movement in this region, TC tracks are examined here based on the full spectrum of track directions for a given location or region. Variability in initial TC track directions is investigated, including an examination of the influence of the Madden-Julian oscillation (MJO). It is demonstrated that there is a considerable degree of seasonal and intraseasonal variation in TC motion in this region. These variations result from variations in genesis location throughout the TC season, as well as zonal wind anomalies associated with the influence of the MJO on the steering flow winds. Anomalous westerly steering flow occurs during MJO phase 4 − 5 and anomalous easterly flow during phase 8 − 1 in the western basin, with resulting changes in the proportion of TC tracks in each direction during these phases of the MJO. The results presented here are intended to provide improved seasonal TC activity guidance and enhanced resilience to TC impacts. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62783
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: CSIRO Climate Science Centre, Aspendale, VIC, Australia; Bureau of Meteorology, Melbourne, VIC, Australia
Recommended Citation:
Lavender S.L.,Dowdy A.J.. Tropical cyclone track direction climatology and its intraseasonal variability in the Australian region[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(22)