Concept
Grêle
Publications associées (49)
On the drivers of droplet variability in alpine mixed-phase clouds
Athanasios Nenes, Alexis Berne, Paraskevi Georgakaki, Maxime Hervo, Jörg Wieder
Droplet formation provides a direct microphysical link between aerosols and clouds (liquid or mixed-phase), and its adequate description poses a major challenge for any atmospheric model. Observations are critical for evaluating and constraining the proces ...
2021Biomass burning aerosol as a modulator of the droplet number in the southeast Atlantic region
The southeastern Atlantic (SEA) and its associated cloud deck, off the west coast of central Africa, is an area where aerosol–cloud interactions can have a strong radiative impact. Seasonally, extensive biomass burning (BB) aerosol plumes from southern Afr ...
2020Gravity Wave Excitation during the Coastal Transition of an Extreme Katabatic Flow in Antarctica
Alexis Berne, Etienne Gabriel Henri Vignon
The offshore extent of Antarctic katabatic winds exerts a strong control on the production of sea ice and the formation of polynyas. In this study, we make use of a combination of ground-based remotely sensed and meteorological measurements at Dumont d'Urv ...
AMER METEOROLOGICAL SOC2020Radar measurements of blowing snow off a mountain ridge
Michael Lehning, Wolf Hendrik Huwald, Josué Etienne Gehring, Benjamin Andreas Walter
Modelling and forecasting wind-driven redistribution of snow in mountainous regions with its implications on avalanche danger, mountain hydrology or flood hazard is still a challenging task often lacking in essential details. Measurements of drifting and b ...
2020Evaluation of global simulations of aerosol particle and cloud condensation nuclei number, with implications for cloud droplet formation
Athanasios Nenes, Julia Schmale, Yang Yang
A total of 16 global chemistry transport models and general circulation models have participated in this study; 14 models have been evaluated with regard to their ability to reproduce the near-surface observed number concentration of aerosol particles and ...
2019Meteorological Aspects of Self-Initiated Upward Lightning at the Santis Tower (Switzerland)
Marcos Rubinstein, Mohammad Azadifar, Antonio Sunjerga, Amirhossein Mostajabi, Jacopo Grazioli, Nikola Besic, Urs Martin Germann
Interest in exploring the meteorological conditions favoring upward lightning from tall man-made structures has grown in recent years, largely due to the worldwide expansion of wind energy. To this end, instrumented towers existing around the world are the ...
2019The Microphysics of Stratiform Precipitation During OLYMPEX: Compatibility Between Triple-Frequency Radar and Airborne In Situ Observations
The link between stratiform precipitation microphysics and multifrequency radar observables is thoroughly investigated by exploiting simultaneous airborne radar and in situ observations collected from two aircraft during the OLYMPEX/RADEX (Olympic Mountain ...
AMER GEOPHYSICAL UNION2019The Importance of Near-Surface Winter Precipitation Processes in Complex Alpine Terrain
Michael Lehning, Franziska Gerber
In this study, near-surface snow and graupel dynamics from formation to deposition are analyzed using WRF in a large-eddy configuration. The results reveal that a horizontal grid spacing of ≤50 m is required to resolve local orographic precipitation enhanc ...
2019A severe hail storm in complex topography in Switzerland - Observations and processes
Nikola Besic, Urs Martin Germann
This paper studies a damaging hail storm that occurred on 6 June 2015 in the complex topography of Switzerland. The storm persisted for several hours and produced large hail resulting in significant damage. Storms of comparable severity occur on average on ...
2018A severe hail storm in complex topography in Switzerland-Observations and processes
Nikola Besic, Urs Martin Germann
This paper studies a damaging hail storm that occurred on 6 June 2015 in the complex topography of Switzerland. The storm persisted for several hours and produced large hail resulting in significant damage. Storms of comparable severity occur on average on ...
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