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Alexis Berne

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Related publications (135)

Hydrometeor classification from two-dimensional video disdrometer data

Devis Tuia, Alexis Berne, Marc Schneebeli Zeugin, Jacopo Grazioli, Samuel Monhart, Timothy Hugh Raupach

The first hydrometeor classification technique based on two-dimensional video disdrometer (2DVD) data is presented. The method provides an estimate of the dominant hydrometeor type falling over time intervals of 60 s during precipitation, using the statist ...

European Geosciences Union2014

Orographic effects on snow deposition patterns in mountainous terrain

Michael Lehning, Alexis Berne, Marc Schneebeli Zeugin, Danny Eddy Scipion Castillo

Orographic lifting of air masses and other topographically modified flows induce cloud and precipitation formation at larger scales and preferential deposition of precipitation at smaller scales. In this study, we examine orographic effects on small-scale ...

Wiley-Blackwell2014

Corrigendum

Alexis Berne, Blandine Bianchi

American Meteorological Society2014

Influence of small scale rainfall variability on standard comparison tools between radar and rain gauge data

Alexis Berne

Rain gauges and weather radars do not measure rainfall at the same scale; roughly 20 cm for the former and 1 km for the latter. This significant scale gap is not taken into account by standard comparison tools (e.g. cumulative depth curves, normalized bias ...

Elsevier2014

Science and technology research and development in support to ITER and the Broader Approach at CEA

Jonathan Bryan Lister, Vincent Martin, Nicolas Mellet, Louis Nicolas, Xiaoxia Bai, Javier García Hernández, Alexis Berne, Fang Liu, Daniel Keller, Antoine Pierre Emmanuel Alexis Merle, Jonathan Bastien Cottet, Joan Decker, Yi Zhang, Yiming Li, Hui Wang

In parallel to the direct contribution to the procurement phase of ITER and Broader Approach, CEA has initiated research & development programmes, accompanied by experiments together with a significant modelling effort, aimed at ensuring robust operation, ...

IOP Publishing Ltd2013

A Variational Approach to Retrieve Rain Rate by Combining Information from Rain Gauges, Radars, and Microwave Links

Alexis Berne, Blandine Bianchi

Accurate and reliable rain rate estimates are important for various hydrometeorological applications. Consequently, rain sensors of different types have been deployed in many regions. In this work, measurements from different instruments, namely, rain gaug ...

2013

Hydrometeor classification using clustering of polarimetric radar measurements

Devis Tuia, Alexis Berne, Jacopo Grazioli

2013

Hydrometeor classification using data mining techniques and polarimetric radar observations

Devis Tuia, Alexis Berne, Jacopo Grazioli

2013

Quantification and Modeling of Wet-Antenna Attenuation for Commercial Microwave Links

Marc Schleiss, Alexis Berne

Data from a new experimental setup deployed in Dübendorf (Switzerland) are used to quantify and model the magnitude and dynamics of the wet-antenna attenuation (WAA) affecting a 1.85-km commercial microwave link at 38 GHz. The results show that the WAA exh ...

2013

The importance of hydraulic groundwater theory in catchment hydrology: The legacy of Wilfried Brutsaert and Jean-Yves Parlange

Alexis Berne

Based on a literature overview, this paper summarizes the impact and legacy of the contributions of Wilfried Brutsaert and Jean-Yves Parlange (Cornell University) with respect to the current state-of-the-art understanding in hydraulic groundwater theory. F ...

American Geophysical Union2013

Quality control of rain gauge measurements using telecommunication microwave links

Alexis Berne, Blandine Bianchi

Accurate rain rate measurements are essential for many hydrological applications. Although rain gauge remains the reference instrument for the measurement of rain rate, the strong spatial and temporal variability of rainfall makes it difficult to spot faul ...

Elsevier Science Bv2013

Radar for hydrology: unfulfilled promise or unrecognized potential?

Alexis Berne

Hydrology requires accurate and reliable rainfall input. Because of the strong spatial and temporal variability of precipitation, estimation of spatially distributed rain rates is challenging. Despite the fact that weather radars provide high-resolution (b ...

Elsevier2013

Influence of the Subgrid Variability of the Raindrop Size Distribution on Radar Rainfall Estimators

Alexis Berne, Joël Jaffrain

This work aims at quantifying the variability of the parameters of the power laws used for rain-rate estimation from radar data, on the basis of raindrop size distribution measurements over a typical weather radar pixel. Power laws between the rain rate an ...

American Meteorological Society2012

An Extended Kalman Filter Framework for Polarimetric X-Band Weather Radar Data Processing

Alexis Berne, Marc Schneebeli Zeugin

The different quantities measured by dual-polarization radar systems are closely linked to each other. An extended Kalman filter framework is proposed in order to make use of constraints on individual radar observables that are induced by these relations. ...

American Meteorological Society2012

A sun-tracking method to improve the pointing accuracy of weather radar

Alexis Berne, Marc Schneebeli Zeugin, Xavier Muth

Accurate positioning of data collected by a weather radar is of primary importance for their appropriate georeferencing, which in turn makes it possible to combine those with additional sources of information (topography, land cover maps, meteorological si ...

2012

Scaling analysis of the variability of the rain drop size distribution at small scale

Marc Schleiss, Alexis Berne, Joël Jaffrain

Like precipitation, the raindrop size distribution (DSD) is strongly variable in space and time. Understanding this variability is important for quantifying and minimizing some of the uncertainties in radar measurements and their interpretation in terms of ...

Elsevier2012

Stochastic simulation of intermittent DSD fields in time

Marc Schleiss, Alexis Berne, Joël Jaffrain

A method for the stochastic simulation of (rain)drop size distributions (DSDs) in space and time using geostatistics is presented. At each pixel, the raindrop size distribution is described by a Gamma distribution with two or three stochastic parameters. T ...

American Meteorological Society2012

High-resolution vertical profiles of polarimetric X-band weather radar observables during snowfall in the Swiss Alps

Michael Lehning, Alexis Berne, Marc Schneebeli Zeugin

An X-band polarimetric radar was deployed in the eastern Swiss Alps at an altitude of 2133 m. Radar measurements were complemented with several weather stations deployed in an altitude range from 1500 to 3100 m as well as with a fixed GPS ground station th ...

Amer Meteorological Soc2012

Quantification of the Small-Scale Spatial Structure of the Raindrop Size Distribution from a Network of Disdrometers

Alexis Berne, Joël Jaffrain

The spatial structure of the raindrop size distribution (DSD) conveys crucial information for reliable quantitative estimation of rainfall using remote sensing techniques. To investigate this question, a network of 16 optical disdrometers has been deployed ...

American Meteorological Society2012

A Disdrometer based on ultra-fast SPAD Cameras

Claudio Bruschini, Edoardo Charbon, Samuel Burri, Alexis Berne, Alain Berthoud

We present a new environmental application of SPAD imagers, the continuous measurement of size and shapes of hydrometeors. A first 32×32 pixel prototype allows real-time operation at very low light levels, 6000 fps and 1:100 average data reduction. ...

OSA2011

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