Publication
A close-ridge small-scale atmospheric flow field and its influence on snow accumulation
Publications associées (42)
Snowfall deposition in mountainous terrain: a statistical downscaling scheme from high-resolution model data on simulated topographies
One of the primary causes of non-uniform snowfall deposition on the ground in mountainous regions is the preferential deposition of snow, which results from the interaction of near-surface winds with topography and snow particles. However, producing high-r ...
Lausanne2024Intermediate complexity atmospheric modeling in complex terrain: is it right?
Michael Lehning, Dylan Stewart Reynolds, Michael Haugeneder
Dynamic downscaling of atmospheric forcing data to the hectometer resolution has shown increases in accuracy for landsurface models, but at great computational cost. Here we present a validation of a novel intermediate complexity atmospheric model, HICAR, ...
Frontiers Media Sa2024Good enough: Intermediate complexity atmospheric models improve the representation of processes affecting seasonal snow
Snow plays a crucial role in processes regulating ecosystems, the climate, and human development. Mountain snowpack in particular has great relevance for downstream communities. Knowledge about the distribution and properties of the snowpack thus help in p ...
EPFL2024Radar 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 ...
EPFL2022Downscaling 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 ...
2022A Downscaling Intercomparison Study: The Representation of Slope- and Ridge-Scale Processes in Models of Different Complexity
Varun Sharma, Franziska Gerber, Dylan Stewart Reynolds
Spatially distributed meteorological information at the slope scale is relevant for many processes in complex terrain, yet information at this sub-km spatial resolution is difficult to obtain. While downscaling to kilometer resolutions is well described in ...
FRONTIERS MEDIA SA2022A snowfall downscaling scheme for mountainous terrain
In mountainous terrain, the spatial and temporal variability of the snow cover is driven by the interaction of meteorological processes with the underlying topography. Typically, terrain-precipitation-wind interactions predominantly shape the spatial snow ...
2021How Forward-Scattering Snow and Terrain Change the Alpine Radiation Balance With Application to Solar Panels
Rough terrain in mid- and high latitudes is often covered with highly reflective snow, giving rise to a very complex transfer of incident sunlight. In order to simplify the radiative transfer in weather and climate models, snow is generally treated as an i ...
AMER GEOPHYSICAL UNION2021Evaluating a prediction system for snow management
The evaluation of snowpack models capable of accounting for snow management in ski resorts is a major step towards acceptance of such models in supporting the daily decision-making process of snow production managers. In the framework of the EU Horizon 202 ...
COPERNICUS GESELLSCHAFT MBH2021A review in snow saltation dynamics and its implications for the surface mass balance
Varun Sharma, Michael Lehning, Franziska Gerber, Daniela Brito Melo, Francesco Comola, Armin Sigmund
Snow covered regions are frequently subjected to strong winds. This leads to the erosion of the snow surface and the occurrence of drifting and blowing snow events. To correctly predict and model these phenomena is of the utmost importance to assess snowpa ...
2021