DOI: 10.1029/2018JF004689
Scopus记录号: 2-s2.0-85052441902
论文题名: A Climate Index Optimized for Longshore Sediment Transport Reveals Interannual and Multidecadal Littoral Cell Rotations
作者: Anderson D. ; Ruggiero P. ; Antolínez J.A.A. ; Méndez F.J. ; Allan J.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 8 起始页码: 1958
结束页码: 1981
语种: 英语
英文关键词: climate variability
; littoral cell evolution
; longshore sediment transport
; multidecadal oscillation
; shoreline change
Scopus关键词: annual variation
; climate variation
; decadal variation
; downscaling
; geomorphological response
; intertidal environment
; longshore transport
; morphodynamics
; shoreline change
; timescale
; Oregon
; United States
英文摘要: A recent 35-year endpoint shoreline change analysis revealed significant counterclockwise rotations occurring in north-central Oregon, USA, littoral cells that extend 10s of kilometers in length. While the potential for severe El Niños to contribute to littoral cell rotations at seasonal to interannual scale was previously recognized, the dynamics resulting in persistent (multidecadal) rotation were unknown, largely due to a lack of historical wave conditions extending back multiple decades and the difficulty of separating the timescales of shoreline variability in a high energy region. This study addresses this question by (1) developing a statistical downscaling framework to characterize wave conditions relevant for longshore sediment transport during data-poor decades and (2) applying a one-line shoreline change model to quantitatively assess the potential for such large embayed beaches to rotate. A climate INdex was optimized to capture variability in longshore wave power as a proxy for potential LOngshore Sediment Transport (LOST_IN), and a procedure was developed to simulate many realizations of potential wave conditions from the index. Waves were transformed dynamically with Simulating Waves Nearshore to the nearshore as inputs to a one-line model that revealed shoreline rotations of embayed beaches at multiple time and spatial scales not previously discernible from infrequent observations. Model results indicate that littoral cells respond to both interannual and multidecadal oscillations, producing comparable shoreline excursions to extreme El Niño winters. The technique quantitatively relates morphodynamic forcing to specific climate patterns and has the potential to better identify and quantify coastal variability on timescales relevant to a changing climate. ©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/113432
Appears in Collections: 气候减缓与适应
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作者单位: College of Engineering, Oregon State University, Corvallis, OR, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States; Department of Sciences and Techniques in Water and Environment, University of Cantabria, Santander, Spain; Oregon Department of Geology and Mineral Industries, Newport, OR, United States
Recommended Citation:
Anderson D.,Ruggiero P.,Antolínez J.A.A.,et al. A Climate Index Optimized for Longshore Sediment Transport Reveals Interannual and Multidecadal Littoral Cell Rotations[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(8)