Dr Jaco Baas
Reader in Ocean Sciences

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
- Article › Research › Peer-reviewed
- Published
Effect of biological polymers on mobility and run-out distance of cohesive and non-cohesive sediment gravity flows
Sobocinska, A. & Baas, J., 1 Oct 2022, In: Marine Geology. 452, 106904.Research output: Contribution to journal › Article › peer-review
- Published
Electrical resistance tomography for suspended sediment measurements in open channel flows using a novel sensor design.
Schlaberg, H. I., Baas, J. H., Wang, M., Best, J. L., Williams, R. A. & Peakall, J., 1 Oct 2006, In: Particle and Particle Systems Characterization. 23, 3-4, p. 313-320Research output: Contribution to journal › Article › peer-review
- Published
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., Jul 2024, In: Water Resources Research. 60, 7, e2024WR037065.Research output: Contribution to journal › Article › peer-review
- Published
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., Oct 2024, In: Sedimentology. 71, 6, p. 1709-1743Research output: Contribution to journal › Article › peer-review
- Published
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 Jan 2024, In: Earth Surface Dynamics. 12, p. 231-247Research output: Contribution to journal › Article › peer-review
- Published
Integrating field and laboratory approaches for ripple development in mixed sand-clay-EPS
Baas, J. H., Baker, M., Malarkey, J., Bass, S. J., Manning, A. J., Hope, J. A., Peakall, J., Lichtman, I., Ye, L., Davies, A., Parsons, D. R., Paterson, D. M. & Thorne, P. D., Dec 2019, In: Sedimentology. 66, 7, p. 2749-2768 20 p.Research output: Contribution to journal › Article › peer-review
- E-pub ahead of print
Integrating transitional-flow signatures into hybrid event beds: Implications for hybrid flow evolution on a submarine lobe fringe
Łapcik, P. & Baas, J., 4 Sept 2024, (E-pub ahead of print) In: Journal of Sedimentary Research.Research output: Contribution to journal › Article › peer-review
- Published
Interactions between sediment microbial ecology and physical dynamics drive heterogeneity in contextually similar depositional systems
Hope, J. A., Malarkey, J., Baas, J. H., Peakall, J., Parsons, D., Manning, A. J., Bass, S., Lichtman, I., Thorne, P., Ye, L. & Paterson, D. M., Oct 2020, In: Limnology and Oceanography. 65, 10, p. 2403-2419Research output: Contribution to journal › Article › peer-review
- Published
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 May 2024, In: Journal of the Geological Society. 181, 4, jgs2023-155.Research output: Contribution to journal › Article › peer-review
- Published
Mixed Sand—Mud Bedforms Produced by Transient Turbulent Flows in the Fringe of Submarine Fans: Indicators of Flow Transformation
Baker, M. L. & Baas, J. H., Aug 2020, In: Sedimentology. 67, 5, p. 2645-2671 27 p.Research output: Contribution to journal › Article › peer-review
- Published
Predicting bedforms and primary current stratification in cohesive mixtures of mud and sand
Baas, J. H., Best, J. L. & Peakall, J., Jan 2016, In: Journal of the Geological Society. 173, 1, p. 12-45Research output: Contribution to journal › Article › peer-review
- Published
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., Sept 2024, In: The Depositional Record. 10, 4, p. 426-440Research output: Contribution to journal › Article › peer-review
- Published
Processes and products of turbidity currents entering soft muddy substrates
Baas, J. H., Manica, R., Puhl, E., Verhagen, I. & de O.Borges, A. L., May 2014, In: Geology. 42, 5, p. 371-374Research output: Contribution to journal › Article › peer-review
- Published
Rapid gravity flow transformation revealed in a single climbing ripple
Baas, J. H., Best, J. & Peakall, J., 1 May 2021, In: Geology. 49, 5, p. 493-497Research output: Contribution to journal › Article › peer-review
- Published
Reversed sediment wave migration in the Irish Sea, NW Europe: A reappraisal of the validity of geometry-based predictive modelling and assumptions
Van Landeghem, K. J., Baas, J. H., Mitchell, N., Wilcockson, D. & Wheeler, A. J., 15 Feb 2012, In: Marine Geology. 295-298, p. 95-112Research output: Contribution to journal › Article › peer-review
- Published
Ripple formation induced by biogenic mounds – Comment
Baas, J. H. & Best, J. L., 15 Aug 2000, In: Marine Geology. 168, 1-4, p. 145-151Research output: Contribution to journal › Article › peer-review
- Published
Sediment Composition Influences Spatial Variation in the Abundance of Human Pathogen Indicator Bacteria within an Estuarine Environment
Perkins, T. L., Clements, K., Baas, J. H., Jago, C. F., Jones, D. L., Malham, S. K. & McDonald, J. E., 14 Nov 2014, In: PLoS ONE. 9, 11Research output: Contribution to journal › Article › peer-review
- Published
Sediment gravity flows: Recent advances in process and field analysis – Introduction
Baas, J. H., 1 Aug 2005, In: Sedimentary Geology. 179, 1-2, p. 1-3Research output: Contribution to journal › Article › peer-review
- Accepted/In press
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 Mar 2025, (Accepted/In press) In: The Geological Society Special Publications.Research output: Contribution to journal › Article › peer-review
- Published
Sole marks reveal deep-marine depositional process and environment: implications for flow transformation and hybrid event bed models
Baas, J., Tracey, N. D. & Peakall, J., 4 Oct 2021, In: Journal of Sedimentary Research. 91, 9, p. 986–1009Research output: Contribution to journal › Article › peer-review
- Published
Spatio-temporal evolution of velocity structure, concentration and grainsize stratification within experimental particulate gravity currents.
McCaffrey, W. D., Choux, C. M., Baas, J. H. & Haughton, P. D., 1 Jun 2003, In: Marine and Petroleum Geology. 20, 6-8, p. 851-860Research output: Contribution to journal › Article › peer-review
- Published
Sticky stuff: Redefining bedform prediction in modern and ancient environments
Schindler, R. J., Parsons, D. R., Ye, L., Hope, J. A., Baas, J. H., Peakall, J., Manning, A. J., Aspden, R. J., Malarkey, J., Simmons, S., Paterson, D. M., Lichtman, I. D., Davies, A. G., Thorne, P. D. & Bass, S. J., 27 Mar 2015, In: Geology.Research output: Contribution to journal › Article › peer-review
- Published
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., Aug 2023, In: Journal of Geophysical Research: Earth Surface. 128, 8, e2022JF006781.Research output: Contribution to journal › Article › peer-review
- Published
The Deep-Water Architecture Knowledge Base: Towards objective comparison of deep-marine sedimentary systems.
Baas, J. H., McCaffrey, W. D. & Knipe, R. J., 1 Nov 2005, In: Petroleum Geoscience. 11, 4, p. 309-320Research output: Contribution to journal › Article › peer-review
- Published
The Effect of Clay Type on the Properties of Cohesive Sediment Gravity Flows and their Deposits
Baker, M. L., Baas, J. H., Malarkey, J., Silva Jacinto, R., Craig, M. J., Kane, I. A. & Barker, S., 2017, In: Journal of Sedimentary Research. 87, 11, p. 1176-1195 59 p.Research output: Contribution to journal › Article › peer-review