Concept

Glossaire de la météorologie

Publications associées (24)

An analytical approximation of urban heat and dry islands and their impact on convection triggering

It is well known that cities increase air and surface temperatures compared to their rural sur-roundings, the so-called urban heat island (UHI) effect. However, the associated changes in at-mospheric humidity (also known as urban dry island, UDI) and conve ...

ELSEVIER2022

Multiphase processes in the EC-Earth model and their relevance to the atmospheric oxalate, sulfate, and iron cycles

Athanasios Nenes

Understanding how multiphase processes affect the iron-containing aerosol cycle is key to predicting ocean biogeochemistry changes and hence the feedback effects on climate. For this work, the EC-Earth Earth system model in its climate-chemistry configurat ...

COPERNICUS GESELLSCHAFT MBH2022

Efficient algorithms for wave problems

Boris Bonev

Wave phenomena manifest in nature as electromagnetic waves, acoustic waves, and gravitational waves among others.Their descriptions as partial differential equations in electromagnetics, acoustics, and fluid dynamics are ubiquitous in science and engineeri ...

EPFL2021

Estimating 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 ...

2020

Hydrodynamics of a periodically wind‑forced small and narrow stratified basin: a large‑eddy simulation experiment

Alfred Johny Wüest, Damien Bouffard, Hugo Nicolás Ulloa Sánchez, Oscar Rodrigo Sepúlveda Steiner, Serban George Constantinescu, Kyoung Sik Chang

We report novel results of a numerical experiment designed for examining the basin-scale hydrodynamics that control the mass, momentum, and energy distribution in a daily wind-forced, small thermally-stratified basin. For this purpose, the 3-D Boussinesq e ...

2018

Invariance of the Double-Moment Normalized Raindrop Size Distribution through 3D Spatial Displacement in Stratiform Rain

Alexis Berne, Timothy Hugh Raupach

Double-moment normalization of the drop size distribution (DSD) summarizes the DSD in a compact way, using two of its statistical moments and a "generic'' double-moment normalized DSD function. Results are presented of an investigation into the invariance ...

Amer Meteorological Soc2017

Investigating the contribution of secondary ice production to in-cloud ice crystal numbers

Athanasios Nenes

In-cloud measurements of ice crystal number concentration can be orders of magnitude higher than the precloud ice nucleating particle number concentration. This disparity may be explained with secondary ice production processes. Several such processes have ...

Blackwell Publishing Ltd2017

Modelling liquid water transport in snow under rain-on-snow conditions – considering preferential flow

Michael Lehning, Nander Wever, Sebastian Würzer, Tobias Jonas

Rain on snow (ROS) has the potential to generate severe floods. Thus, precisely predicting the effect of an approaching ROS event on runoff formation is very important. Data analyses from past ROS events have shown that a snowpack experiencing ROS can eith ...

Copernicus GmbH2017

How do patchy snow covers affect turbulent sensible heat fluxes? – Numerical analysis and experimental findings

Michael Lehning, Sebastian Schlögl

The surface energy balance of a snow cover significantly changes once the snow cover gets patchy. The substantial progress in knowledge about the surface energy balance of patchy snow covers is a mandatory requirement to reduce biases in flux parameterizat ...

2017

Snowmelt observations at the slope scale and implications for the catchment response using the Alpine3D model

Michael Lehning, Wolf Hendrik Huwald, Ernesto Trujillo Gomez, Tristan Jonas Brauchli

Snowpack and especially its melt during spring is a crucial resource for water availability in mountainous regions. A better understanding of the processes and their representation in hydrological models is therefore necessary for different purposes, such ...

2016

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