Heavy snowfall event over the Swiss Alps: did wind shear impact secondary ice production?

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A causal intercomparison framework unravels precipitation drivers in Global Storm-Resolving Models

Athanasios Nenes, Lucile Anna Ricard

Correctly representing convective precipitation remains a long-standing problem in climate models, due to its highly parameterized nature and unclear role of drivers interacting over a wide range of spatial scales. We analyze and compare simulations of Glo ...

2025

A stratocumulus to cumulus transition during a cold-air outbreak: The role of aerosols

Georgia Sotiropoulou

Cold air outbreaks (CAOs) are phenomena that occur across high latitudes during winter months and favor the development of extensive boundary layer clouds. As the boundary layer evolves, changes in cloud morphology often result in a stratocumulus to cumulu ...

2025

Fingerprints of Frontal Passages and Post-Depositional Effects in the Stable Water Isotope Signal of Seasonal Alpine Snow

Michael Lehning, Yoann Nicolas Sadowski

Stable water isotopes are used as a paleothermometer in ice cores for climate reconstructions over the past millennia. The underlying physical processes involved in the isotope-temperature relation, however, unfold at much shorter timescales. Here, we stud ...

AMER GEOPHYSICAL UNION2022

A New Streamwise Scaling for Wind Turbine Wake Modeling in the Atmospheric Boundary Layer

Fernando Porté Agel, Dara Vahidi

In this study, we aim to investigate if there is a scaling of the streamwise distance from a wind turbine that leads to a collapse of the mean wake velocity deficit under different ambient turbulence levels. For this purpose, we perform large-eddy simulati ...

2022

RainForest: a random forest algorithm for quantitative precipitation estimation over Switzerland

Alexis Berne, Daniel Wolfensberger

Quantitative precipitation estimation (QPE) is a difficult task, particularly in complex topography, and requires the adjustment of empirical relations between radar observables and precipitation quantities, as well as methods to transform observations alo ...

COPERNICUS GESELLSCHAFT MBH2021