Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 9, issue 3
Articles | Volume 9, issue 3
https://doi.org/10.5194/esurf-9-539-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-9-539-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 9, issue 3
Research article
 | Highlight paper
 | 
16 Jun 2021
Research article | Highlight paper |  | 16 Jun 2021

Rarefied particle motions on hillslopes – Part 1: Theory

David Jon Furbish, Joshua J. Roering, Tyler H. Doane, Danica L. Roth, Sarah G. W. Williams, and Angel M. Abbott

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Latest update: 12 Jun 2025
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Short summary
Sediment particles skitter down steep hillslopes on Earth and Mars. Particles gain speed in going downhill but are slowed down and sometimes stop due to collisions with the rough surface. The likelihood of stopping depends on the energetics of speeding up (heating) versus slowing down (cooling). Statistical physics predicts that particle travel distances are described by a generalized Pareto distribution whose form varies with the Kirkby number – the ratio of heating to cooling.
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