DOI: 10.1029/2018JC013939
Scopus记录号: 2-s2.0-85052405715
论文题名: A Numerical Study of Tropical Cyclone-Induced Sediment Dynamics on the Australian North West Shelf
作者: Dufois F. ; Lowe R.J. ; Rayson M.D. ; Branson P.M.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 8 起始页码: 5113
结束页码: 5133
语种: 英语
英文关键词: COAWST
; ROMS
; sediment pathways
; sediment transport model
; surface waves
; tropical cyclone
英文摘要: Owing to their strong forcing of the ocean surface, tropical cyclones strongly modify the hydrodynamics of Australia's North West Shelf (one of the world's tropical cyclone hot spots), which in turn plays a dominant role in its sediment dynamics. Previous modeling studies have focused on describing the short-term sediment dynamics during individual tropical cyclones but have lacked validation of the responses using field observations. As a consequence, the long-term cumulative impact of the tropical cyclones on the residual sediment transport pathways at the shelf scale remains unclear. In this study we apply a sediment transport model over the North West Shelf, validate its performance using an extensive field data set, and implement a 14-year-long model simulation to assess the sediment fluxes. The model results confirm the overwhelming role tropical cyclones play on sediment transport processes over most of the shelf, despite each cyclone only influencing a small portion of the shelf at a particular time. Overall, we identified 19 tropical cyclone events over the 14-year period, which, despite accounting for less than 5% of time, were found to drive the majority of both the suspended sediment alongshore and seaward cross-shore transport. The results revealed significant interannual variability of the tropical cyclone-induced sediment dynamics with greater suspended transport during the three consecutive Ningaloo Niño years (2011–2013) where sea surface temperatures off northwestern Australia were anomalously warm with elevated tropical cyclone activity. ©2018. 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/113312
Appears in Collections: 气候减缓与适应
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作者单位: The UWA Oceans Institute, University of Western Australia, Crawley, WA, Australia; ARC Centre of Excellence for Coral Reef Studies, University of Western Australia, Crawley, WA, Australia; Oceans Graduate School, University of Western Australia, Crawley, WA, Australia; IFREMER, DYNECO/DHYSED, Plouzané, France; CSIRO Oceans and Atmosphere, Crawley, WA, Australia
Recommended Citation:
Dufois F.,Lowe R.J.,Rayson M.D.,et al. A Numerical Study of Tropical Cyclone-Induced Sediment Dynamics on the Australian North West Shelf[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(8)