Publications de Jacopo Grazioli

Observation of the Orientation of Snow Hydrometeors at Sheltered and Unsheltered Sites

Knowledge about orientation of falling snow is still poorly documented with field measurements despite its importance, for example, in the interpretation of remote sensing data. This study investigates the orientation of snow hydrometeors using data from a ...

2025

A 7-year record of vertical profiles of radar measurements and precipitation estimates at Dumont d'Urville, Adélie Land, East Antarctica

Alexis Berne, Jacopo Grazioli

Studying precipitation falling over Antarctica is crucial as snowfall represents the main water input term for the polar cap. However, precipitation observations still remain scarce-and, more particularly, in the atmospheric column-due to numerous experime ...

2024

INTEGRATING SUSTAINABILITY IN HIGHER EDUCATION INSTITUTIONS: A CASE STUDY FROM EPFL

Pierre Dillenbourg, Françoise Gisou van der Goot Grunberg, Jacopo Grazioli, Adélie Eliane Garin

As concerns regarding sustainability and ethical responsibility in engineering practices continue to rise, it becomes imperative for Higher Education Institutions (HEIs) to equip future engineers with the necessary knowledge and skills to address these cha ...

European Society for Engineering Education (SEFI)2024

MASCDB, a database of images, descriptors and microphysical properties of individual snowflakes in free fall

Alexis Berne, Jacopo Grazioli, Gionata Ghiggi

Dataset overview This dataset provides data and images of snowflakes in free fall collected with a Multi-Angle Snowflake Camera (MASC) The dataset includes, for each recorded snowflakes: A triplet of gray-scale images corresponding to the ...

Zenodo2023

Synergetic Aircraft and Ground-Based Remote Sensing and In Situ Measurements of Snowfall Microphysical Properties

Alexis Berne, Jacopo Grazioli, Anne-Claire Marie Billault--Roux

An international field experiment took place in the Swiss Jura in January 2021 as a milestone of the European ICE GENESIS project (www.ice-genesis.eu/), which aims to better measure, understand, and model the ice/snow particle properties and mechanisms res ...

2023

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

Jacopo Grazioli

The change in wind direction and speed with height, referred to as vertical wind shear, causes enhanced turbulence in the atmosphere. As a result, there are enhanced interactions between ice particles that break up during collisions in clouds which could c ...

Copernicus GmbH2023

MASCDB, a database of images, descriptors and microphysical properties of individual snowflakes in free fall

Alexis Berne, Jacopo Grazioli, Anne-Claire Marie Billault--Roux, Gionata Ghiggi

Snowfall information at the scale of individual particles is rare, difficult to gather, but fundamental for a better understanding of solid precipitation microphysics. In this article we present a dataset (with dedicated software) of in-situ measurements o ...

2022

Reconstruction of the mass and geometry of snowfall particles from multi-angle snowflake camera (MASC) images

Alexis Berne, Jacopo Grazioli, Jussi Sakari Leinonen

This paper presents a method named 3D-GAN, based on a generative adversarial network (GAN), to retrieve the total mass, 3D structure and the internal mass distribution of snowflakes. The method uses as input a triplet of binary silhouettes of particles, co ...

2021

LMA observations of upward lightning flashes at the Santis Tower initiated by nearby lightning activity

Marcos Rubinstein, Antonio Sunjerga, Farhad Rachidi-Haeri, Mohammad Azadifar, Amirhossein Mostajabi, Jacopo Grazioli, Nikola Besic, Urs Martin Germann

We present in this paper lightning current measurements, LMA (Lightning Mapping Array) data and fast antenna electric fields associated with upward flashes observed at the Santis Tower during summer of 2017. The LMA network consists of six stations that we ...

Elsevier2020

Analysis of the lightning production of convective cells

Marcos Rubinstein, Antonio Sunjerga, Farhad Rachidi-Haeri, Mohammad Azadifar, Amirhossein Mostajabi, Jacopo Grazioli, Nikola Besic, Urs Martin Germann

This paper presents an analysis of the lightningproduction of convective cells. The cells were detected by the MeteoSwiss Thunderstorms Radar Tracking (TRT) algorithm in the course of a lightning measurement campaign thattook place in the summer of 2017 in ...

2019