Dr Jaco Baas
Uwch Ddarlithydd

Contact info
Position: Reader
Room: 305 Craig Mair
Phone: 01248 382894
E-mail: j.baas@bangor.ac.uk
Web: Google Scholar, ResearchGate
I am Reader in Fine Particle Dynamics in the School of Ocean Sciences, and specialise in the erosion, transport, and deposition of fine, cohesive sediment. I graduated from the University of Utrecht (the Netherlands) with a combined BSc/MSc in Sedimentary Geology in 1988. At the same university, I completed my PhD in Bedform Dynamics in 1993. Subsequently, I was Postdoctoral Research Fellow at Geomar Research Centre in Kiel, Germany (studying Late-Pleistocene climate signals in slope sediments from the North-Atlantic continental margin), at the University of Rouen, France (on resuspension processes in the Seine estuary and gravel mining in the English Channel), and at the University of Bergen, Norway (investigating grain orientations in turbidite deposits).
In 1998, I moved to the School of Earth and Environment at the University of Leeds, where I started as a Marie Curie Research Fellow and then became a Senior Research Fellow. My research in Leeds included the physical properties of particulate density currents and their deposits and the dynamics of turbulence-modulated flows carrying cohesive clay particles. I took up my present post in Bangor in January 2007.
I am a process sedimentologist with more than 25 years of experience in sediment transport in fluvial, shallow marine, and deep-marine environments. My main fundamental and applied research interests include physical and biological cohesion in fine-grained sediment, the dynamics of sedimentary bedforms, and sediment gravity flows in the deep ocean, but my expertise also stretches to hydraulic engineering, palaeoclimatology, and mathematical modelling. I combine experimental research with field work to answer timely research questions, taking a blue-skies approach as well as collaborating with industry.
Research Area
- 2023
- Cyhoeddwyd
Streamwise turbulence modulation in non-uniform open-channel clay suspension flows
de Vet, M. G. W., Fernandez, R., Baas, J. H., McCaffrey, W. D. & Dorrell, R. M., Awst 2023, Yn: Journal of Geophysical Research: Earth Surface. 128, 8, e2022JF006781.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- 2024
- Cyhoeddwyd
Influence of cohesive clay on wave–current ripple dynamics captured in a 3D phase diagram
Xuxu, W., Malarkey, J., Fernández, R., Baas, J., Pollard, E. & Parsons, D., 30 Ion 2024, Yn: Earth Surface Dynamics. 12, t. 231-247Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
On the origin of chevron marks and striated grooves, and their use in predicting mud bed rheology
McGowan, D., Salian, A., Baas, J., Peakall, J. & Best, J., Chwef 2024, Sedimentology, 71, 2, t. 687-708 22 t.Allbwn ymchwil: Cyfraniad at gyhoeddiad arbenigol › Erthygl
- Cyhoeddwyd
Marine redox dynamics and biotic response to the mid-Silurian Ireviken Extinction Event in a mid-shelf setting
Wang, Y., Wignall, P. B., Xiong, Y., Loydell, D. K., Peakall, J., Baas, J. H., Mills, B. J. W. & Poulton, S. W., 10 Mai 2024, Yn: Journal of the Geological Society. 181, 4, jgs2023-155.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Fine sediment in mixed sand-silt environments impact bedform geometry by altering sediment mobility
de Lange, S. L., Niesten, I., van de Veen, S. H. J., Baas, J., Lammers, J., Waldschlaeger, K., Boelee, D. & Hoitink, A. J. F., Gorff 2024, Yn: Water Resources Research. 60, 7, e2024WR037065.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Wedi ei Dderbyn / Yn y wasg
Using mixed-clay sediment gravity flow rheology as an indicator for flow velocity and run-out distance
Baker, M., Baas, J., Malarkey, J. & Silva Jacinto, R., 10 Gorff 2024, (Wedi ei Dderbyn / Yn y wasg) Particulate Gravity Currents in the Environment. American Geophysical UnionAllbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod › adolygiad gan gymheiriaid
- Cyhoeddwyd
Preservation of groove mark striae formed by armoured mud clasts: the role of armour sediment size and bed yield stress
Lock, C., Reid, M., Baas, J. & Peakall, J., Medi 2024, Yn: The Depositional Record. 10, 4, t. 426-440Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- E-gyhoeddi cyn argraffu
Integrating transitional-flow signatures into hybrid event beds: Implications for hybrid flow evolution on a submarine lobe fringe
Łapcik, P. & Baas, J., 4 Medi 2024, (E-gyhoeddi cyn argraffu) Yn: Journal of Sedimentary Research.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Flow-induced Interfacial Deformation Structures (FIDS): Implications for the interpretation of palaeocurrents, flow dynamics and substrate rheology
Peakall, J., Best, J., Baas, J., Wignall, P. B., Hodgson, D. M. & Łapcik, P., Hyd 2024, Yn: Sedimentology. 71, 6, t. 1709-1743Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- E-gyhoeddi cyn argraffu
Coming to light: How effective are sediment gravity flows in removing fine suspended carbonate from reefs?
Baas, J., Hewitt, W., Lokier, S. & Hendry, J., 27 Tach 2024, (E-gyhoeddi cyn argraffu) Yn: The Depositional Record.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Effect of Bed Clay on Surface Water-Wave Reconstruction from Ripples
Malarkey, J., Pollard, E., Fernández, R., Xuxu, W., Baas, J. & Parsons, D., 28 Rhag 2024, Yn: Scientific Reports. 14, 1, t. 30688 30688.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- 2025
- Cyhoeddwyd
Distinguishing microbially induced sedimentary structures from fluid-induced interfacial deformation structures (MISS versus FIDS)
Wignall, P. B., Peakall, J., Best, J. & Baas, J., 7 Maw 2025, Yn: The Geological Society Special Publications. 556, 1Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Wedi ei Dderbyn / Yn y wasg
Softgrounds: Substrates controlled by sediment gravity flows and the evolution of deep-water trace fossils
Wang, Y., Wignall, P. B., Peakall, J., Baas, J. & Poulton, S. W., 10 Maw 2025, (Wedi ei Dderbyn / Yn y wasg) Yn: The Geological Society Special Publications.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid