Lonneke Roelofs

Mar 25, 2024 | insu.hal.science | Lonneke Roelofs |Susan Conway |Tjalling de Haas |Colin M. Dundas

How, when and where current mass flows in Martian gullies are driven by CO2 sublimation Origine : Publication financée par une institution

Mar 12, 2024 | nature.com | Lonneke Roelofs |Susan Conway |Tjalling de Haas |Colin M. Dundas |Stephen Lewis

AbstractMartian gullies resemble water-carved gullies on Earth, yet their present-day activity cannot be explained by water-driven processes. The sublimation of CO2 has been proposed as an alternative driver for sediment transport, but how this mechanism works remains unknown. Here we combine laboratory experiments of CO2-driven granular flows under Martian atmospheric pressure with 1D climate simulation modelling to unravel how, where, and when CO2 can drive present-day gully activity.