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Séminaire LPC2E : Quantifying air pollution with small sensors: Insights from volcanoes & the urban Arctic présenté par Tjarda Roberts

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Small sensors present a highly portable, low power and low-cost method to quantify gases and particles in the atmosphere, as an alternative to larger, more expensive instruments..


Date -
Heure 10h30 - 11h30
Adresse

3 avenue de la recherche Scientifique
41071 Orléans la Source
France

Contact
LPC2E

Résumé :

Small sensors present a highly portable, low power and low-cost method to quantify gases and particles in the atmosphere, as an alternative to larger, more expensive instruments. Indeed, small sensors provide a valuable approach to probe the polluted atmosphere above remote locations - such as the emission-plumes from volcanoes - whose summits are difficult to access. Small sensors can also be used to characterize urban air pollution, for example to quantify personal exposure or to improve the spatial-temporal resolution of ground-based air quality monitoring networks. As well as ground-based measurements, small sensors can be deployed on moving platforms (balloons, drones, cableways) to spatially map emission sources and identify pollution processing.

During 2019 we undertook field-campaigns that deployed small sensors to measure gas and aerosol particles at the summits of volcanoes Mt Etna and Vulcano (Italy) and around the Arctic city of Fairbanks (Alaska). The extreme conditions of these locations can pose challenges to small sensor operation (e.g. high acidity, highly polluted conditions, very high or low temperatures). I will present some provisional findings regarding characterizing gas-aerosol emissions from volcanoes and demonstrate the added value that portable small sensor packages on moving platforms can bring to probe the vertical structure of the polluted atmosphere. Finally, I will discuss the future research outlook for small sensor applications in atmospheric science in the context of projects ANR VOLC-HAL-CLIM and ALPACA-CASPA among others.