Concept
Convergence (météorologie)
Publications associées (14)
Urban boundary-layer flows in complex terrain: Dynamic interactions during a hot and dry summer season in Phoenix, Arizona
Anthropogenic modification of natural landscapes to urban environments impacts land-atmosphere interactions in the boundary layer. Ample research has demonstrated the effect of such landscape transitions on development of the urban heat island (UHI), but c ...
Wiley2024The Alfvenic nature of chromospheric swirls
Aleksi Antoine Bossart, Andrea Francesco Battaglia
Context. Observations show that small-scale vortical plasma motions are ubiquitous in the quiet solar atmosphere. They have received increasing attention in recent years because they are a viable candidate mechanism for the heating of the outer solar atmos ...
EDP SCIENCES S A2021R2D2: A Region-Based Recursive Doppler Dealiasing Algorithm for Operational Weather Radar
Alexis Berne, Marco Gabella, Monika Feldmann, Daniel Wolfensberger
Region-based Recursive Doppler Dealiasing (R2D2) is a novel dealiasing algorithm to unfold Doppler velocity fields obtained by operational radar measurements. It specializes in resolving issues when the magnitude of the gate-to-gate velocity shear approach ...
2020Estimating the free troposphere measurement quality from high-altitude stations using topographic analysis
Measurements of the Free Troposphere (FT) are important for the study of Climate Change and understanding the Earth’s atmosphere in general. Ground-based, high altitude measurement stations are useful for their ability to collect consistent in situ FT meas ...
2020Decomposition Strategies for Nonconvex Problems, a Parametric Approach
This thesis deals with the development of numerical methods for solving nonconvex optimisation problems by means of decomposition and continuation techniques. We first introduce a novel decomposition algorithm based on alternating gradient projections and ...
EPFL2016Stable Atmospheric Boundary-Layer Flows over a Steep, Alpine Slope: Observations, Theory and Multi-Scale Transport Dynamics
Marc Parlange, Chad Higgins, Holly Jayne Oldroyd, Eric Richard Pardyjak
Katabatic flows are high density air flows traversing down a slope under the action of a gravitational force. These flows can be exploited for wind energy and are gaining importance in predicting scalar transport (e.g. pollutants, water vapor, CO2 drainage ...
2015Three-Dimensional Simulation of Lake Ontario North-Shore Hydrodynamics and Contaminant Transport
The hydrodynamics and contaminant transport in the nearshore region of Lake Ontario, from Port Hope to Cobourg, were simulated. The model results were comprehensively validated against observations of water level, temperature, and currents collected during ...
American Society of Civil Engineers2014The influence of winds, sea-surface temperature and precipitation anomalies on Antarctic regional sea-ice conditions during IPY 2007
The 2007 International Polar Year (IPY) in the Antarctic was distinguished by strong regional and seasonal ice-atmosphere-ocean anomalies associated with an overall weakening of the prevailing westerly circulation. Here we assess the ice-atmosphere-ocean c ...
2011Global climate response to anthropogenic aerosol indirect effects: Present day and year 2100
Aerosol indirect effects (AIE) are a principal source of uncertainty in future climate predictions. The present study investigates the equilibrium response of the climate system to present-day and future AIE using the general circulation model (GCM), Godda ...
Blackwell Publishing Ltd2010Flow experiments with gravel and blocks at small scale to investigate parameters and mechanisms involved in rock avalanches
Vincent Labiouse, Irene Manzella
Laboratory experiments play an important role in improving the modelling of rock avalanches since they contribute to a better understanding of the mechanisms that characterise propagation and to identifying parameters influencing velocity and deposit chara ...
2009