Publications de Jérôme François Sylvain Dujardin

Influence of air flow features on alpine wind energy potential

Michael Lehning, Wolf Hendrik Huwald, Franziska Gerber, Jérôme François Sylvain Dujardin, Fanny Kristianti

Wind energy is one of the potential options to fill the gap in renewable energy production in Switzerland during the winter season when the energy demand exceeds local production capacities. With likely further rising energy consumption in the future, the ...

Frontiers Media Sa2024

Evidence of Strong Flux Underestimation by Bulk Parametrizations During Drifting and Blowing Snow

Michael Lehning, Wolf Hendrik Huwald, Varun Sharma, Francesco Comola, Koichi Nishimura, Jérôme François Sylvain Dujardin, Daniela Brito Melo, Armin Sigmund

The influence of drifting and blowing snow on surface mass and energy exchange is difficult to quantify due to limitations in both measurements and models, but is still potentially very important over large areas with seasonal or perennial snow cover. We p ...

SPRINGER2023

Combining Weather Station Data and Short-Term LiDAR Deployment to Estimate Wind Energy Potential with Machine Learning: A Case Study from the Swiss Alps

Michael Lehning, Wolf Hendrik Huwald, Franziska Gerber, Jérôme François Sylvain Dujardin, Fanny Kristianti

Wind energy potential in complex terrain is still poorly understood and difficult to quantify. With Switzerland’s current efforts to shift to renewable energy resources, it is now becoming even more crucial to investigate the hidden potential of wind energ ...

2023

Inter-comparison of spatial models for high shares of renewable electricity in Switzerland

Michael Lehning, Jérôme François Sylvain Dujardin

This study presents an inter-comparison of three structurally different electricity system models (EXPANSE, Nexus-e, and OREES) with sub-national spatial resolution in Switzerland in 2035. We analyze technology and regional implications of three targets fo ...

ELSEVIER SCI LTD2023

Wind-Topo: Downscaling near-surface wind fields to high-resolution topography in highly complex terrain with deep learning

Michael Lehning, Jérôme François Sylvain Dujardin

Predicting wind flow in highly complex terrain like the Alps is a challenge for all models. When physical processes need to be resolved in a spatially explicit manner, grids with high horizontal resolution of a few hundred meters are often required and dra ...

WILEY2022

SWEET-EDGE: Enabling Decentralized renewable Generation in the Alps

Michael Lehning, Annelen Kahl, Jérôme François Sylvain Dujardin

The overall EDGE objective is to fast-track the growth of locally-sourced decentralized renewable energy in Switzerland and to ensure that by 2035 and 2050, when ambitious shares of renewable energy are reached, the Swiss energy system is designed and oper ...

2022

Evidence of Strong Flux Underestimation by Bulk Parametrizations During Drifting and Blowing Snow

Michael Lehning, Wolf Hendrik Huwald, Varun Sharma, Francesco Comola, Koichi Nishimura, Jérôme François Sylvain Dujardin, Daniela Brito Melo, Armin Sigmund

The influence of drifting and blowing snow on surface mass and energy exchange is difficult to quantify due to limitations in both measurements and models, but is still potentially very important over large areas with seasonal or perennial snow cover. We p ...

2022

Optimized market value of alpine solar photovoltaic installations

Annelen Kahl, Jérôme François Sylvain Dujardin

Solar photovoltaic (PV) is the most rapidly expanding renewable resource worldwide. Yet, its full potential may be hindered by mismatches with market demand and correlated production profiles. In this research, we explore a case study of innovative PV plac ...

Pergamon-Elsevier Science Ltd2022

Wind-Topo_Model

Michael Lehning, Jérôme François Sylvain Dujardin

Model and Data: Dujardin, J.; Lehning, M. Wind-Topo_model. EnviDat 2022 ...

Zenodo2022

Meteorology and snow transport at S17 near Syowa, Antarctica, in austral summer 2018/2019

Michael Lehning, Wolf Hendrik Huwald, Varun Sharma, Francesco Comola, Jérôme François Sylvain Dujardin, Daniela Brito Melo, Armin Sigmund

This dataset contains measurement and simulation data. The measurements characterize the standard meteorology, turbulence, and snow transport at the S17 site near Syowa Station in East Antarctica during an expedition in austral summer 2018/2019. Large-eddy ...

2021

Synergistic optimization of renewable energy installations through evolution strategy

Michael Lehning, Annelen Kahl, Jérôme François Sylvain Dujardin

With large parts of the world moving toward renewable energies, there is an urgent need to organize this large-scale transition effectively. This paper presents a new methodology to guide the planning and siting of renewable electricity generation for coun ...

2021

The complex winds of the Alps: an unseen asset for the energy transition

Jérôme François Sylvain Dujardin

Wind energy has played a major role in the development of our society since 5000 BC when the first sail boats traveled the Nile River. Wind technology continued to advance with the invention of wind-powered pumps and mills in China and the Middle East as e ...

EPFL2021

Potential increase in energy storage capacity in the Swiss Alps to support the massive development of renewables: Case study of the Grande Dixence hydropower scheme

Anton Schleiss, Pedro Filipe De Almeida Manso, Blaise Monay, Jérôme François Sylvain Dujardin

Only 42 % of the mean annual production of large hydropower plants in the Swiss Alps is stored in their reservoirs. Once the reservoirs are full at the end of the summer semester, plants are operated as run-on-the-river in order to avoid spilling. A signif ...

2019

The bright side of PV production in snow-covered mountains

Michael Lehning, Annelen Kahl, Jérôme François Sylvain Dujardin

Our work explores the prospect of bringing the temporal production profile of solar photovoltaics (PV) into better correlation with typical electricity consumption patterns in the midlatitudes. To do so, we quantify the potential of three choices for PV in ...

National Academy of Sciences2019

Dataset on PV Production in Snow Covered Mountains

Michael Lehning, Annelen Kahl, Jérôme François Sylvain Dujardin

The SUNWELL Modelling Environment is a combination of data and code that models electricity production from satellite-derived irradiance data and other spatial data sets for all of Switzerland. This ensemble accompanies the publication "The bright side of ...

2018

Improvement of Wind Power Assessment in Complex Terrain: The Case of COSMO-1 in the Swiss Alps

Michael Lehning, Albertus Christiaan Kruyt, Jérôme François Sylvain Dujardin

This work contains a series of calculations that explore the wind power potential in Switzerland using the Numerical Weather Prediction model COSMO-1. The model's performance was validated in complex terrain by comparing the modeled hourly wind speed to we ...

FRONTIERS MEDIA SA2018

Charting the course: A possible route to a fully renewable Swiss power system

Pedro Filipe De Almeida Manso, Michael Lehning, Albertus Christiaan Kruyt, Stuart John Bartlett, Annelen Kahl, Jérôme François Sylvain Dujardin

The prospect of a renewable transition seems plausible for many countries, but can be shrouded in risks, costs and challenges. This paper illuminates a path for such a transition with a numerical investigation, aimed at resolving the power dynamics of a co ...

2018

Interplay between photovoltaic, wind energy and storage hydropower in a fully renewable Switzerland

Michael Lehning, Albertus Christiaan Kruyt, Stuart John Bartlett, Annelen Kahl, Jérôme François Sylvain Dujardin

As part of its ambitious long term energy strategy, Switzerland plans to phase out nuclear power production and replace most or all of its significant share of national electricity production (40%) by renewables, in particular by photovoltaics (PV) and win ...

Pergamon-Elsevier Science Ltd2017

Assessing the potential increase of seasonal energy storage to mitigate the impact of climate change in Switzerland: Case study of the Grande Dixence dam

Anton Schleiss, Pedro Filipe De Almeida Manso, Blaise Monay, Jérôme François Sylvain Dujardin

The total storage capacity of the reservoirs in Switzerland represents only 42% of their annual production of electricity, but secures approximately 100% of hydropower’s contribution to the winter electricity supply. In order to avoid spilling, the storage ...

2017