| Title: |
Laboratory Investigations of Flow Dynamics and Volume Growth During Erosion of Different Substrates by CO 2 ‐Driven Granular Flows in Martian Gullies |
| Authors: |
Roelofs, Lonneke; Conway, Susan J.; van Dam, Bas; van Eijk, Arjan; Merrison, Jonathan, P; Iversen, Jens, Jacob; Markies, Henk; van Maarseveen, Marcel; de Haas, Tjalling |
| Contributors: |
Department of Physical Geography Utrecht; Universiteit Utrecht / Utrecht University Utrecht; Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG); Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST); Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ); Department of Physics and Astronomy Aarhus; Aarhus University Aarhus; CNES |
| Source: |
ISSN: 2169-9097. |
| Publisher Information: |
CCSD; Wiley-Blackwell |
| Publication Year: |
2025 |
| Collection: |
Université de Nantes: HAL-UNIV-NANTES |
| Subject Terms: |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology; [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
| Description: |
International audience ; Gullies are actively changing landforms on planet Mars. The prevailing hypothesis, supported by a suite of different studies, states that present-day activity in these gullies is caused by fluidized granular flows driven by the sublimation of seasonal CO 2 ice. However, the long-term formation process of gully landscapes is a contentious issue as water-driven debris-flow processes could easily explain erosion. In contrast, we do not know if CO 2 -driven granular flows can cause a significant amount of erosion. In this study, we conducted flume experiments investigating the flow dynamics and erosion capacity of CO 2 -driven granular flows under different substrate and flow settings. Our experiments show that CO 2 -driven granular flows under Martian conditions are efficient erosive agents, which can erode and entrain large volumes of unconsolidated material in various environmental (i.e., substrate and flow) settings. In general, erosion and entrainment enhance the mobility of CO 2 -driven flows. However, the frost and thermal conditions of the slopes and the flow composition determine the erosion efficiency of these flows. Finally, based on terrestrial debris-flow erosion theory we estimate that collisional forces at the base of CO 2 -driven flows can also cause erosion of more consolidated material such bedrock, permafrost or Latitude Dependent Mantle. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1029/2025je008993 |
| Availability: |
https://hal.science/hal-05374862; https://hal.science/hal-05374862v1/document; https://hal.science/hal-05374862v1/file/JGR%20Planets%20-%202025%20-%20Roelofs%20-%20Laboratory%20Investigations%20of%20Flow%20Dynamics%20and%20Volume%20Growth%20During%20Erosion%20of%20Different.pdf; https://doi.org/10.1029/2025je008993 |
| Rights: |
http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.FD011CE8 |
| Database: |
BASE |