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Showing 1–18 of 18 results
Advanced filters: Author: Douglas J. Jerolmack Clear advanced filters

  • The onset of sediment transport is commonly believed to be an abrupt process, which influences our understanding of river erosion and landscape dynamics. Houssais et al.show instead a continuous transition from a creeping to a granular-flow regime by monitoring internal motion in a sediment bed.

    • Morgane Houssais
    • Carlos P. Ortiz
    • Douglas J. Jerolmack
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-8

  • Dune fields often show abrupt changes in morphology over short distances, but the mechanism driving the changes has been unclear. Physical modelling and airborne altimetry from White Sands, New Mexico, show that the development of an internal boundary layer is linked to the vegetation and hydrologic patterns observed there.

    • Douglas J. Jerolmack
    • Ryan C. Ewing
    • Ilya Buynevich
    Research
    Nature Geoscience
    Volume: 5, P: 206-209

  • Regarding the failure and flow of wet soil, a question that remains is how soil material composition influences rheology. Based on Soft Earth suspension flow experiments, the authors discover a continuous transition from frictional-to-cohesive rheology recreating all complex behaviors reported for natural soil slurries.

    • Shravan Pradeep
    • Paulo E. Arratia
    • Douglas J. Jerolmack
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-10

  • In spring 2011, a record-breaking flood necessitated diversion of water from the lower Mississippi River to the Atchafalaya River Basin. A comparison between the dynamics in the two basins based on field-calibrated satellite observations and in situ data suggests that river-mouth dynamics and wetland sedimentation are directly linked.

    • Federico Falcini
    • Nicole S. Khan
    • Douglas J. Jerolmack
    Research
    Nature Geoscience
    Volume: 5, P: 803-807

  • River beds often exhibit armouring, in which formation of a coarse surface layer shields the finer underlying grains from erosion. Here, using experiments in a laboratory river and discrete and continuum models, the authors demonstrate that river-bed armouring is driven by vertical granular segregation.

    • Behrooz Ferdowsi
    • Carlos P. Ortiz
    • Douglas J. Jerolmack
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-10

  • Giant dunes—stunning landforms that grow in patterns as wind blows sand grains over thousands of years—are measured across the entire planet for the first time. With this data, it’s shown the dunes can, in principle, grow in scale indefinitely.

    • Andrew Gunn
    • Giampietro Casasanta
    • Douglas J. Jerolmack
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-8

  • The discovery of rounded pebbles by Curiosity suggests sustained fluvial activity existed on Mars, but interpretations have been qualitative. Here, the authors show that transport distance can be calculated on the basis of pebble shape alone, suggesting they travelled 10 s of km by bed-load transport.

    • Tímea Szabó
    • Gábor Domokos
    • Douglas J. Jerolmack
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-7

  • Earth’s largest dune fields are set to become less dynamic on average over this century due to anthropogenic climate change, with no future action able to mitigate this effect, as predicted by the newest iteration of CMIP models.

    • Andrew Gunn
    • Amy East
    • Douglas J. Jerolmack
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • The downhill motion of soils on hillslopes is not well understood. Here, the authors present laboratory experiments and show that hillslopes are made perpetually fragile by environmental perturbations that prevent them from stabilizing.

    • Nakul S. Deshpande
    • David J. Furbish
    • Douglas J. Jerolmack
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • A unified theoretical framework for wind transport of grains and dune formation, which takes into account the various exotic conditions present across the Solar System, is presented. The results are consistent with experimental observations and give insight into the different behaviour of sediments and dunes in Solar System bodies.

    • Andrew Gunn
    • Douglas J. Jerolmack
    Research
    Nature Astronomy
    Volume: 6, P: 923-929

  • Delta morphology is thought to be controlled by factors such as river discharge, tides and waves. Numerical modelling shows that sediment cohesion also strongly influences the development of a delta’s characteristics.

    • Douglas A. Edmonds
    • Rudy L. Slingerland
    Research
    Nature Geoscience
    Volume: 3, P: 105-109

  • The size and shape of alluvial river channels control and adjust to the flow of water and sediment, with consequences for flooding and ecological habitat. This Perspective examines how the sediment entrainment threshold constrains the size, shape and dynamics of alluvial rivers.

    • Colin B. Phillips
    • Claire C. Masteller
    • Douglas J. Jerolmack
    Reviews
    Nature Reviews Earth & Environment
    Volume: 3, P: 406-419

  • Earth and planetary landscapes are composed of soft matter: amorphous materials that deform in response to broad-spectrum excitations, from fluid turbulence to plate tectonics. This Review surveys complex behaviours of earth materials that challenge existing physics frameworks and may inspire new approaches.

    • Douglas J. Jerolmack
    • Karen E. Daniels
    Reviews
    Nature Reviews Physics
    Volume: 1, P: 716-730