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

Sediment Dynamics and Morphology

  1. Cyhoeddwyd
  2. Cyhoeddwyd

    Grain fabric control on directional permeability in deep-marine sandstones.

    Baas, J. H., McCaffrey, W. D., Hailwood, E. & Kay, M., 1 Ion 2006.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  3. Cyhoeddwyd

    Handbook of Clay Science, by F. Bergaya, B.K.G. Theng & G. Lagaly - Book Review

    Baas, J. H., 1 Maw 2007, Unknown.

    Allbwn ymchwil: Cyfraniad arallCyfraniad Arall

  4. 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. 231-247

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  5. Cyhoeddwyd

    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., Rhag 2019, Yn: Sedimentology. 66, 7, t. 2749-2768 20 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  6. Cyhoeddwyd

    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., Hyd 2020, Yn: Limnology and Oceanography. 65, 10, t. 2403-2419

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  7. Cyhoeddwyd
  8. Cyhoeddwyd

    Looking inside turbidity currents: the effects of spatial and temporal changes in velocity, concentration and grain size on depositional properties.

    Baas, J. H., McCaffrey, W. D., Choux, C. & Haughton, P. D., 1 Ion 2003.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  9. Wedi ei Dderbyn / Yn y wasg

    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., 13 Maw 2024, (Wedi ei Dderbyn / Yn y wasg) Yn: Journal of the Geological Society.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  10. Cyhoeddwyd

    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., Awst 2020, Yn: Sedimentology. 67, 5, t. 2645-2671 27 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  11. Cyhoeddwyd

    Modelling rheological and turbulence regimes in kaolinite-rich sediment flows.

    Silva Jacinto, R. & Baas, J. H., 1 Ion 2007.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  12. Cyhoeddwyd

    Muddy Coasts of the World: Processes, Deposits and Function, by T. Healy, Y. Wang & J.-A. Healy

    Baas, J. H., 1 Ion 2003, Unknown.

    Allbwn ymchwil: Cyfraniad arallCyfraniad Arall

  13. Cyhoeddwyd

    Non-cohesive, mixed and cohesive high-density turbidity currents: Flow and deposit properties inferred from laboratory experiments.

    Manica, R., Baas, J. H., De Oliveira Borges, A. L., Maestri, R. D., Peakall, J. & McCaffrey, W. D., 1 Ion 2006.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  14. Cyhoeddwyd

    On the flow of natural clay suspensions over smooth and rough beds.

    Baas, J. H. & Best, J. L., 1 Ion 2008.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  15. 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 arbenigolErthygl

  16. Cyhoeddwyd

    Passive sediment filling of U-shaped animal burrows.

    Kellman, P., Baas, J. H., Best, J. L. & Uchman, A., 1 Ion 2004.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  17. Cyhoeddwyd

    Physical Processes in Earth and Environmental Sciences, by M. Leeder & M. Pérez-Arlucea

    Baas, J. H., 1 Medi 2006, Unknown.

    Allbwn ymchwil: Cyfraniad arallCyfraniad Arall

  18. Cyhoeddwyd

    Predicting bedforms and primary current stratification in cohesive mixtures of mud and sand

    Baas, J. H., Best, J. L. & Peakall, J., Ion 2016, Yn: Journal of the Geological Society. 173, 1, t. 12-45

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  19. Cyhoeddwyd

    Processes and products of turbidity currents entering soft muddy substrates

    Baas, J. H., Manica, R., Puhl, E., Verhagen, I. & de O.Borges, A. L., Mai 2014, Yn: Geology. 42, 5, t. 371-374

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  20. Cyhoeddwyd

    Rapid gravity flow transformation revealed in a single climbing ripple

    Baas, J. H., Best, J. & Peakall, J., 1 Mai 2021, Yn: Geology. 49, 5, t. 493-497

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  21. Cyhoeddwyd

    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 Chwef 2012, Yn: Marine Geology. 295-298, t. 95-112

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  22. Cyhoeddwyd

    Ripple formation induced by biogenic mounds – Comment

    Baas, J. H. & Best, J. L., 15 Awst 2000, Yn: Marine Geology. 168, 1-4, t. 145-151

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  23. Cyhoeddwyd

    Ripple, Ripple Mark, Ripple Structure.

    Baas, J. H. & Middleton, G. V. (gol.), 1 Ion 2003, Encyclopedia of Sediments and Sedimentary Rocks. 2003 gol. Kluwer Academic Publishers, t. 565-567

    Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion CynhadleddPennod

  24. Cyhoeddwyd
  25. Cyhoeddwyd

    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 Tach 2014, Yn: PLoS ONE. 9, 11

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  26. Cyhoeddwyd

    Sediment gravity flows: Recent advances in process and field analysis – Introduction

    Baas, J. H., 1 Awst 2005, Yn: Sedimentary Geology. 179, 1-2, t. 1-3

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  27. Cyhoeddwyd

    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 Hyd 2021, Yn: Journal of Sedimentary Research. 91, 9, t. 986–1009

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  28. Cyhoeddwyd

    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 Meh 2003, Yn: Marine and Petroleum Geology. 20, 6-8, t. 851-860

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  29. Cyhoeddwyd

    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 Maw 2015, Yn: Geology.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  30. 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 gyfnodolynErthygladolygiad gan gymheiriaid

  31. Cyhoeddwyd

    Submarine Mass Movements and their Consequences, by J. Locat, & J. Mienert

    Baas, J. H. & Strachan, L., 1 Mai 2005, Unknown.

    Allbwn ymchwil: Cyfraniad arallCyfraniad Arall

  32. Cyhoeddwyd

    Suspended and bedload dynamics in a tidally influenced river: the river Dyfi, Wales, UK.

    Brewer, P., Vericat, D., Baas, J. H., Jago, C. F., Brasington, J., Wheaton, J. M. & Causer, F., 1 Ion 2007.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  33. Cyhoeddwyd

    TDURE : A mathematical model for the duration of deposition from decelerating high-density turbidity currents.

    Baas, J. H., Van Dam, R. L. & Storms, J. E., 1 Ion 2000, t. 74-75.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  34. Cyhoeddwyd

    Temporal flow structure of an experimental particulate density current linked to textural variation of the resultant flume deposit.

    Barker, S., McCaffrey, B., Haughton, P., Baas, J. H. & Choux, C., 1 Ion 2004.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  35. Cyhoeddwyd
  36. Cyhoeddwyd

    The Deep-Water Architecture Knowledge Base: Towards objective comparison of deep-marine sedimentary systems.

    Baas, J. H., McCaffrey, W. D. & Knipe, R. J., 1 Tach 2005, Yn: Petroleum Geoscience. 11, 4, t. 309-320

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  37. Cyhoeddwyd

    The Deep-Water Architecture Knowledge Base: Towards objective comparison of deep-marine sedimentary systems.

    Baas, J. H. & McCaffrey, W. D., 1 Ion 2006.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  38. Cyhoeddwyd

    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, Yn: Journal of Sedimentary Research. 87, 11, t. 1176-1195 59 t.

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  39. Cyhoeddwyd

    The dynamics of turbulent, transitional and laminar clay-laden flow over a fixed current ripple.

    Baas, J. H. & Best, J. L., 1 Meh 2008, Yn: Sedimentology. 55, 3, t. 635-66

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  40. Cyhoeddwyd

    The hiding-exposure effect revisited: A method to calculate the mobility of bimodal sediment mixtures

    McCarron, C. J., Van Landeghem, K. J. J., Baas, J. H., Amoudry, L. O. & Malarkey, J., Ebr 2019, Yn: Marine Geology. 410, t. 22-31

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  41. Cyhoeddwyd

    The pervasive role of biological cohesion in bedform development

    Malarkey, J., Baas, J. H., Hope, J. A., Aspenden, R. J., Parsons, D. R., Peakall, J., Peterson, D. M., Schindler, R. J., Ye, L., Lichtman, I. D., Bass, S. J., Davies, A. G., Manning, A. J. & Thorne, P. D., 6 Chwef 2015, Yn: Nature Communications. 6, 6257

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  42. Cyhoeddwyd
  43. Cyhoeddwyd

    The role of biophysical cohesion on subaqueous bed form size

    Parsons, D. R., Schindler, R. J., Hope, J. A., Malarkey, J., Baas, J. H., Peakall, J., Manning, A. L., Ye, L., Simmons, S., Paterson, D. M., Aspden, R. J., Bass, S. J., Davies, A. G., Lichtman, I. D. & Thorne, P. D., 28 Ion 2016, Yn: Geophysical Research Letters. 43, t. 1566-1573

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  44. Cyhoeddwyd

    Thresholds of intrabed flow and other interactions of turbidity currents with soft muddy substrates

    Baas, J., Manica, R., Puhl, E. & Borges, A. L. D. O., 1 Rhag 2016, Yn: Sedimentology. 63, 7, t. 2002-2036

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  45. Cyhoeddwyd

    Turbulence modulation behind ripples and dunes in clay-laden currents.

    Baas, J. H. & Best, J. L., 1 Ion 2004.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  46. Cyhoeddwyd

    Turbulence modulation in clay-laden flows over ripples and dunes.

    Baas, J. H. & Best, J. L., 1 Ion 2005.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  47. Cyhoeddwyd

    Turbulence modulation in clay-rich flows: Implications for depositional process and bed form geometry.

    Baas, J. H. & Best, J. L., 1 Ion 2005.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  48. Cyhoeddwyd

    Turbulence modulation in clay-rich sediment-laden flows and some implications for sediment deposition.

    Baas, J. H. & Best, J. L., 1 Ion 2002, Yn: Journal of Sedimentary Research. 72, 3, t. 336-340

    Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

  49. Cyhoeddwyd

    Turbulence modulation in high-concentration clay-rich flows and the possible origin of “massive” sand beds.

    Baas, J. H. & Best, J. L., 1 Ion 2000, t. 6-7.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur

  50. Cyhoeddwyd

    Turbulence-modulated clay-laden flow over flat beds, ripple and dunes.

    Baas, J. H. & Best, J. L., 1 Ion 2005.

    Allbwn ymchwil: Cyfraniad at gynhadleddPapur