DOI: 10.1002/grl.50488
论文题名: Hyperpycnal plume-derived fans in the Santa Barbara Channel, California
作者: Warrick J.A. ; Simms A.R. ; Ritchie A. ; Steel E. ; Dartnell P. ; Conrad J.E. ; Finlayson D.P.
刊名: Geophysical Research Letters
ISSN: 0094-9077
EISSN: 1944-8808
出版年: 2013
卷: 40, 期: 10 起始页码: 2081
结束页码: 2086
语种: 英语
英文关键词: hyperpycnal plume
; Santa Barbara Channel
Scopus关键词: Continental shelves
; Geophysical process
; Hyperpycnal flows
; Hyperpycnal plumes
; Santa barbara channels
; Sediment deposits
; Sediment dispersal
; Seismic reflection data
; Gravitation
; Gravity waves
; Sediments
; concentration (composition)
; continental shelf
; data set
; deep sea
; depositional environment
; dispersal
; geophysical method
; lidar
; plume
; sediment transport
; seismic reflection
; watershed
; California
; Santa Barbara Channel
; United States
英文摘要: Hyperpycnal gravity currents rapidly transport sediment across shore from rivers to the continental shelf and deep sea. Although these geophysical processes are important sediment dispersal mechanisms, few distinct geomorphic features on the continental shelf can be attributed to hyperpycnal flows. Here we provide evidence of large depositional features derived from hyperpycnal plumes on the continental shelf of the northern Santa Barbara Channel, California, from the combination of new sonar, lidar, and seismic reflection data. These data reveal lobate fans directly offshore of the mouths of several watersheds known to produce hyperpycnal concentrations of suspended sediment. The fans occur on an upwardly concave section of the shelf where slopes decrease from 0.04 to 0.01, and the location of these fans is consistent with wave- and auto-suspending sediment gravity current theories. Thus, we provide the first documentation that the morphology of sediment deposits on the continental shelf can be dictated by river-generated hyperpycnal flows. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879936168&doi=10.1002%2fgrl.50488&partnerID=40&md5=e3d532e2dbaf3d5281c1423a0c307346
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6341
Appears in Collections: 气候减缓与适应
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作者单位: U.S. Geological Survey, Santa Cruz, CA 95060, United States
Recommended Citation:
Warrick J.A.,Simms A.R.,Ritchie A.,et al. Hyperpycnal plume-derived fans in the Santa Barbara Channel, California[J]. Geophysical Research Letters,2013-01-01,40(10).