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DOI	10.1016/j.epsl.2019.116023
	What determines the downstream evolution of turbidity currents?
	Heerema C.J.; Talling P.J.; Cartigny M.J.; Paull C.K.; Bailey L.; Simmons S.M.; Parsons D.R.; Clare M.A.; Gwiazda R.; Lundsten E.; Anderson K.; Maier K.L.; Xu J.P.; Sumner E.J.; Rosenberger K.; Gales J.; McGann M.; Carter L.; Pope E.; Monterey Coordinated Canyon Experiment (CCE) Team
发表日期	2020
ISSN	0012821X
卷号	532
英文摘要	Seabed sediment flows called turbidity currents form some of the largest sediment accumulations, deepest canyons and longest channel systems on Earth. Only rivers transport comparable sediment volumes over such large areas; but there are far fewer measurements from turbidity currents, ensuring they are much more poorly understood. Turbidity currents differ fundamentally from rivers, as turbidity currents are driven by the sediment that they suspend. Fast turbidity currents can pick up sediment, and self-accelerate (ignite); whilst slow flows deposit sediment and dissipate. Self-acceleration cannot continue indefinitely, and flows might reach a near-uniform state (autosuspension). Here we show how turbidity currents evolve using the first detailed measurements from multiple locations along their pathway, which come from Monterey Canyon offshore California. All flows initially ignite. Typically, initially-faster flows then achieve near-uniform velocities (autosuspension), whilst slower flows dissipate. Fractional increases in initial velocity favour much longer runout, and a new model explains this bifurcating behaviour. However, the only flow during less-stormy summer months is anomalous as it self-accelerated, which is perhaps due to erosion of surficial-mud layer mid-canyon. Turbidity current evolution is therefore highly sensitive to both initial velocities and seabed character. © 2019
关键词	autosuspension dissipation flow behaviour ignition submarine canyon turbidity current
英文关键词	Energy dissipation; Ignition; Ocean currents; Offshore oil well production; Sediment transport; autosuspension; Flow behaviours; Initial velocities; Sediment accumulation; Sediment volumes; Submarine canyon; Turbidity current; Uniform velocities; Turbidity; dissipation; sediment transport; submarine canyon; turbidity current; Monterey Canyon; Pacific Ocean
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202638
作者单位	Departments of Geography and Earth Sciences, Durham University, Durham, DH1 3LE, United Kingdom; Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039, United States; Ocean and Earth Science, University of Southampton, European Way, Southampton, SO14 3ZH, United Kingdom; National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton, SO14 3ZH, United Kingdom; Energy and Environment Institute, University of Hull, Cottingham Road, Hull, HU6 7RX, United Kingdom; Pacific Coastal and Marine Science Center, U.S. G.S., Santa Cruz, CA 95060, United States; National Institute of Water and Atmospheric Research, Wellington, New Zealand; Southern University of Science and Technology of China, Shenzhen, 518055, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China; University of Plymouth, Drake Circus, Plymouth, PL4 8AA, United Kingdom; Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand
推荐引用方式 GB/T 7714	Heerema C.J.,Talling P.J.,Cartigny M.J.,et al. What determines the downstream evolution of turbidity currents?[J],2020,532.
APA	Heerema C.J..,Talling P.J..,Cartigny M.J..,Paull C.K..,Bailey L..,...&Monterey Coordinated Canyon Experiment .(2020).What determines the downstream evolution of turbidity currents?.Earth and Planetary Science Letters,532.
MLA	Heerema C.J.,et al."What determines the downstream evolution of turbidity currents?".Earth and Planetary Science Letters 532(2020).