Publication
Snowfall deposition in mountainous terrain: a statistical downscaling scheme from high-resolution model data on simulated topographies
Publications associées (109)
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Michael Lehning, Wolf Hendrik Huwald, Jérôme François Sylvain Dujardin, Franziska Gerber, Fanny Kristianti
Wind energy potential in complex terrain is still poorly understood and difficult to quantify. With Switzerland’s current efforts to shift to renewable energy resources, it is now becoming even more crucial to investigate the hidden potential of wind energ ...
2023The Effect of Wind on the Surface Snow Microstructure – Experimental Insights
Sonja Wahl, Benjamin Andreas Walter
Snow precipitation frequently occurs under moderate to strong wind conditions, resulting in drifting and blowing snow. Processes like particle fragmentation and airborne metamorphism during snow transport result in microstructural modifications of the ulti ...
2023Flow and Snow in Complex Terrain: across-scale modelling for a correct surface mass balance
Varun Sharma, Michael Lehning, Wolf Hendrik Huwald, Jérôme François Sylvain Dujardin, Franziska Gerber, Daniela Brito Melo, Nander Wever, Armin Sigmund, David Nicholas Wagner
Preferential deposition of snow precipitation, snow transport and snow sublimation modify the mass which gets incorporated into or removed from the seasonal or perennial snow cover. These processes happen at very small scales from snow grain size to larger ...
2023Snow Loss Into Leads in Arctic Sea Ice: Minimal in Typical Wintertime Conditions, but High During a Warm and Windy Snowfall Event
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The amount of snow on Arctic sea ice impacts the ice mass budget. Wind redistribution of snow into open water in leads is hypothesized to cause significant wintertime snow loss. However, there are no direct measurements of snow loss into Arctic leads. We m ...
2023Downscaling of Historical Wind Fields over Switzerland Using Generative Adversarial Networks
Anthony Christopher Davison, Ophélia Mireille Anna Miralles
Near-surface wind is difficult to estimate using global numerical weather and climate models, because airflow is strongly modified by underlying topography, especially that of a country such as Switzerland. In this article, we use a statistical approach ba ...
2022Radar processing techniques to study summer snowfall in the Sør Rondane Mountains, Antarctica
Snowfall is one of the main positive contributors to the surface mass balance of the Antarctic ice sheet. There are several techniques to monitor solid precipitation on the continent. Among them, meteorological radars provide the means to characterize the ...
EPFL2022Wind-tunnel experimental studies of the spatial snow distribution over grass and bush surfaces
The snow is one of the most important water resources in grassland in northern and western China, while the wind blowing snow due to the strong wind there is a common phenomenon, which can lead to heavy disasters to harm the local animal husbandry and tran ...
SPRINGER2022Considering snow depositions and transport mechanisms in meteorological analysis of predicting snow loads on buildings
Michael Lehning, Borui Zhang, Qingwen Zhang
The meteorological conditions determine snow evolutions on and around buildings. Those climatic impacts have been independently considered in the current design codes of buildings, namely the wind pressure and the snow load. But snow load estimates are onl ...
ELSEVIER2022Wind-Topo: Downscaling near-surface wind fields to high-resolution topography in highly complex terrain with deep learning
Michael Lehning, Jérôme François Sylvain Dujardin
Predicting wind flow in highly complex terrain like the Alps is a challenge for all models. When physical processes need to be resolved in a spatially explicit manner, grids with high horizontal resolution of a few hundred meters are often required and dra ...
WILEY2022Parameterizing snow saltation: the exponential decay of the mass flux profile and its relation to the saltation dynamics
Varun Sharma, Michael Lehning, Daniela Brito Melo, Armin Sigmund
Drifting snow events lead to snow redistribution and enhance snow sublimation. Taking into account the importance of snow sublimation to the correct prediction of the surface mass balance, a general consensus has emerged within the scientific community on ...
2022