Landscapes Live
EGU-GM Online Seminars in Geomorphology
Landscapes Live is a weekly online seminar series freely accessible to the international scientific community interested in various aspects of geomorphology. Our talks take place on Zoom every Thursday, starting at 4pm time of Paris/Berlin/Amsterdam. Check your local time here.
Landscapes Live is affiliated to the Geomorphology (GM) division of EGU and contribute to develop its virtual activities. Indeed, EGU is pioneering a new CampFire concept to bring together the geoscience community in between General Assemblies. We hope that this helps us in our transition to a greener future and ensure that our community better serve the needs of all scientists regardless of international mobility.
‼️ You can register for all seminars using this Zoom link: https://cuboulder.zoom.us/meeting/register/Sq6Km1gtQVac_bPHqnZ6fw#/registration
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Unstable rock slopes and slow-moving rockslides are highly varied phenomena: every instability is different, and often very complex. We may first identify an unstable slope by observing open bedrock fractures, daylighting sliding surfaces, rockfall activity, or active displacement in scree or bedrock revealed by techniques such as InSAR. Once a slope is flagged as unstable, the detective work begins. What exactly is unstable? How much movement is occurring? What is driving that movement? And is there a risk of a larger, sudden failure?
Answering these questions requires a combination of well-established methods and site-specific techniques tailored to each slope. Only by integrating different approaches can we understand the processes at work and the factors controlling instability. In this presentation, I will explore two unstable rock slopes in Western Norway that appear so similar at first glance but are yet so different.
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Abundant liquid water once flowed across Mars. Yet its volume, timing, and the climatic conditions under which it existed remain difficult to quantify. Relationships calibrated on Earth provide one avenue to determine these quantities. A recently developed terrestrial scaling between lake size and outlet canyon dimensions constrains flood volumes at Martian paleolakes. Similarly, stream power incision models based on Earth can be leveraged on Mars. Using precipitation outputs from Mars paleoclimate models, we build surface discharge maps and test these against observed valley network erosion. The best-fitting scenarios require widespread surface water including a global ocean, with valley formation before the emplacement of Tharsis. However, application of Earth-based techniques to Mars is limited by two key differences from Earth: preservation and resolution. Approximately 3.5 billion years of impact cratering has destroyed a substantial fraction of valley networks, which interpretations of present-day morphometrics must account for. Future work should continue to quantify how the surface has preserved fluvial signals through time. Finally, we address the resolution gap with a new, open-source global digital elevation model, removing the data barrier for future Mars geomorphic studies.
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Sediment Transport and Flood Risk in Mountain Rivers
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Forest-landscape dynamics: Terrestrial Laser Scanning connects forest structure and landscape form in three dimensions
Now on LL's Youtube page: https://www.youtube.com/watch?v=Q4dVlCIhW_M
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Sediment Transport and Flood Risk in Mountain Rivers
Now on LL's Youtube page: https://youtu.be/oRWuKuMw-Tg
Forest-landscape dynamics: Terrestrial Laser Scanning connects forest structure and landscape form in three dimensions
Now on LL's Youtube page: https://www.youtube.com/watch?v=Q4dVlCIhW_M
Cancelled
Now on LL's Youtube page: https://youtu.be/0wQLtauN-yY
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Resolving the impacts of earthquakes, storms, and prolonged rainfall on shallow landsliding
Talk is now on LL's YouTube channel: https://www.youtube.com/watch?v=72yxOMXzfNs
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Wiggles in width: Insights into alluvial channel dynamics from variability in high-resolution downstream hydraulic geometry
Talk is now on LL's YouTube channel: https://www.youtube.com/watch?v=BMizP1choAE
Now on LL's Youtube page: https://youtu.be/OwWTykkZYYw