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Dr Steve Simmons


Longest sediment flows yet measured show how major rivers connect efficiently to deep sea (2022)
Journal Article
Talling, P. J., Baker, M. L., Pope, E. L., Ruffell, S. C., Silva Jacinto, R., Heijnen, M. S., …Hilton, R. J. (2022). Longest sediment flows yet measured show how major rivers connect efficiently to deep sea. Nature communications, 13, Article 4193. https://doi.org/10.1038/s41467-022-31689-3

We document directly for the first time how major river floods connect to the deep-sea, by analysing the longest runout sediment flows (of any type) yet measured in action. These seafloor turbidity currents originated from the Congo River-mouth, with... Read More about Longest sediment flows yet measured show how major rivers connect efficiently to deep sea.

First source-to-sink monitoring shows dense head controls sediment flux and runout in turbidity currents (2022)
Journal Article
Pope, E. L., Cartigny, M. J., Clare, M. A., Talling, P. J., Lintern, D. G., Vellinga, A., …Vendettuoli, D. (2022). First source-to-sink monitoring shows dense head controls sediment flux and runout in turbidity currents. Science Advances, 8(20), eabj3220. https://doi.org/10.1126/sciadv.abj3220

Until recently, despite being one of the most important sediment transport phenomena on Earth, few direct measurements of turbidity currents existed. Consequently, their structure and evolution were poorly understood, particularly whether they are de... Read More about First source-to-sink monitoring shows dense head controls sediment flux and runout in turbidity currents.

Fill, flush or shuffle: How is sediment carried through submarine channels to build lobes? (2022)
Journal Article
Heijnen, M. S., Clare, M. A., Cartigny, M. J., Talling, P. J., Hage, S., Pope, E. L., …Hughes Clarke, J. E. (2022). Fill, flush or shuffle: How is sediment carried through submarine channels to build lobes?. Earth and planetary science letters, 584, Article 117481. https://doi.org/10.1016/j.epsl.2022.117481

Submarine channels are the primary conduits for land-derived material, including organic carbon, pollutants, and nutrients, into the deep-sea. The flows (turbidity currents) that traverse these systems can pose hazards to seafloor infrastructure such... Read More about Fill, flush or shuffle: How is sediment carried through submarine channels to build lobes?.

Knickpoints and crescentic bedform interactions in submarine channels (2021)
Journal Article
Chen, Y., Parsons, D. R., Simmons, S. M., Williams, R., Cartigny, M. J. B., Hughes Clarke, J. E., …Vendettuoli, D. (2021). Knickpoints and crescentic bedform interactions in submarine channels. Sedimentology, 68(4), 1358-1377. https://doi.org/10.1111/sed.12886

Submarine channels deliver globally important volumes of sediments, nutrients, contaminants and organic carbon into the deep sea. Knickpoints are significant topographic features found within numerous submarine channels, which most likely play an imp... Read More about Knickpoints and crescentic bedform interactions in submarine channels.

Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers (2021)
Journal Article
Bailey, L. P., Clare, M. A., Rosenberger, K. J., Cartigny, M. J., Talling, P. J., Paull, C. K., …Monterey CCE Team. (2021). Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers. Earth and planetary science letters, 562, https://doi.org/10.1016/j.epsl.2021.116845

Turbidity currents dominate sediment transfer into the deep ocean, and can damage critical seabed infrastructure. It is commonly inferred that powerful turbidity currents are triggered by major external events, such as storms, river floods, or earthq... Read More about Preconditioning by sediment accumulation can produce powerful turbidity currents without major external triggers.

Relating the Flow Processes and Bedforms of Steady-State and Waning Density Currents (2020)
Journal Article
de Cala, I., Ohata, K., Dorrell, R., Naruse, H., Patacci, M., Amy, L. A., …McCaffrey, W. D. (2020). Relating the Flow Processes and Bedforms of Steady-State and Waning Density Currents. Frontiers in Earth Science, 8, https://doi.org/10.3389/feart.2020.535743

© Copyright© 2020 de Cala, Ohata, Dorrell, Naruse, Patacci, Amy, Simmons, McLelland and McCaffrey. The interaction between turbidity currents and mobile substrates can lead to the development of different types of bedforms. Although much research has... Read More about Relating the Flow Processes and Bedforms of Steady-State and Waning Density Currents.

Author Correction: Rapidly-migrating and internally-generated knickpoints can control submarine channel evolution (Nature Communications, (2020), 11, 1, (3129), 10.1038/s41467-020-16861-x) (2020)
Journal Article
Heijnen, M. S., Clare, M. A., Cartigny, M. J., Talling, P. J., Hage, S., Lintern, D. G., …Clarke, J. E. (2020). Author Correction: Rapidly-migrating and internally-generated knickpoints can control submarine channel evolution (Nature Communications, (2020), 11, 1, (3129), 10.1038/s41467-020-16861-x). Nature communications, 11(1), Article 4425. https://doi.org/10.1038/s41467-020-18394-9

© 2020, The Author(s). The original version of this Article contained an error in the labelling of the cross-section in Fig. 2g and the vertical axis in Fig. 2b. This has been corrected in both the PDF and HTML versions of the Article.

Rapidly-migrating and internally-generated knickpoints can control submarine channel evolution (2020)
Journal Article
Heijnen, M. S., Clare, M. A., Cartigny, M. J. B., Talling, P. J., Hage, S., Lintern, D. G., …Hughes Clarke, J. E. (2020). Rapidly-migrating and internally-generated knickpoints can control submarine channel evolution. Nature communications, 11(1), Article 3129. https://doi.org/10.1038/s41467-020-16861-x

Submarine channels are the primary conduits for terrestrial sediment, organic carbon, and pollutant transport to the deep sea. Submarine channels are far more difficult to monitor than rivers, and thus less well understood. Here we present 9 years of... Read More about Rapidly-migrating and internally-generated knickpoints can control submarine channel evolution.

Asymmetric effects of a modelled tidal turbine on the flow and seabed (2020)
Journal Article
Ramírez -Mendoza, R., Murdoch, L., Jordan, L. B., Amoudry, L. O., McLelland, S., Cooke, R. D., …Vezza, M. (2020). Asymmetric effects of a modelled tidal turbine on the flow and seabed. Renewable energy, 159, 238-249. https://doi.org/10.1016/j.renene.2020.05.133

The extraction of power from the flow of water has become an important potential source of clean energy. In spite of significant interest in the interaction between energy extraction devices and water currents, comparatively little work has focused o... Read More about Asymmetric effects of a modelled tidal turbine on the flow and seabed.

Direct evidence of a high-concentration basal layer in a submarine turbidity current (2020)
Journal Article
Maier, K. L., Paull, C. K., Cartigny, M. J., Simmons, S. M., Talling, P. J., Wang, Z., …Parsons, D. R. (in press). Direct evidence of a high-concentration basal layer in a submarine turbidity current. Deep Sea Research Part I: Oceanographic Research Papers, Article 103300. https://doi.org/10.1016/j.dsr.2020.103300

Submarine turbidity currents are one of the most important sediment transfer processes on earth. Yet the fundamental nature of turbidity currents is still debated; especially whether they are entirely dilute and turbulent, or a thin and dense basal l... Read More about Direct evidence of a high-concentration basal layer in a submarine turbidity current.