Communication Dans Un Congrès Année : 2025

Deploying dense Artificial Light At Night (ALAN) monitoring networks for territorial actions: the cases of Réunion Island and La Brière region, France

Déploiement de réseaux denses de suivi de la pression lumineuse pour des actions territoriales: les cas de l'île de La Réunion et de la Brière, France

Résumé

Dense networks of photometric sensors offer high-frequency, high-resolution data at unprecedented spatial scales. Such arrays detect lighting variations across minutes to years, enabling both short- and long-term assessments, while also enhancing skyglow and radiative transfer modeling. Critically, they support fine-scale evaluation of lighting policies — such as LED transitions or dimming regulations — by tracking their effects on sky brightness. These systems also enable near-continuous monitoring of Artificial Light At Night (ALAN) changes with atmospheric conditions including aerosols and cloud cover, and help validate satellite-derived products while informing ecological and health impact assessments. In this contribution, we present high-resolution datasets from two dense TESS-W sensor networks deployed for long-term ALAN monitoring in: (1) Réunion Island, a French territory in the Indian Ocean with volcanic terrain, high biodiversity, and a rapidly urbanizing coast; and (2) the Brière region, a wetland near France’s Atlantic coast, home to a regional nature park and sensitive nocturnal ecosystems. These networks provide continuous, multi-year measurements of night-sky brightness at fine spatial (~km) and temporal (~minute) scales. We describe the network architecture, calibration procedures, data processing pipeline, and access details. By making these high-resolution ALAN datasets openly available, this work enhances our ability to monitor light pollution and evaluate the effectiveness of mitigation strategies. Designed as part of the Observatoire de l’Environnement Nocturne of the French National Centre for Scientific Research (CNRS), these datasets offer a robust empirical foundation for investigating the multifaceted dynamics of light pollution across ecological, atmospheric, sociocultural, and territorial contexts. They also contribute to public engagement and educational initiatives, fostering broader awareness and collective action toward preserving the nocturnal environment.

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hal-05343777 , version 1 (03-11-2025)

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  • HAL Id : hal-05343777 , version 1

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Matthieu Renaud, Samuel Challéat, Sylvain Morvan, Christian Brouat, Mathieu Delsaut, et al.. Deploying dense Artificial Light At Night (ALAN) monitoring networks for territorial actions: the cases of Réunion Island and La Brière region, France. 9th International Conference On Artificial Light At Night ALAN 2025, Dark Sky Ireland; Friends of Mayo Dark Skies, Oct 2025, Westport, Ireland. https://artificiallightatnight.org/alan-conference-2025/venue-alan-2025/. ⟨hal-05343777⟩
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