We report here on the results of a proof-of-concept study aimed at remotely sensing the volcanic CO2 flux using a Differential Adsorption lidar (DIAL-lidar). The observations we report on were conducted in June 2014 on Stromboli volcano, where our lidar (LIght Detection And Ranging) was used to scan the volcanic plume at ∼3km distance from the summit vents. The obtained results prove that a remotely operating lidar can resolve a volcanic CO2 signal of a few tens of ppm (in excess to background air) over km-long optical paths. We combine these results with independent estimates of plume transport speed (from processing of UV Camera images) to derive volcanic CO2 flux time-series of ≈16–33min temporal resolution. Our lidar-based CO2 fluxes range from 1.8 ± 0.5 to 32.1 ±8.0kg/s, and constrain the daily averaged CO2 emissions fromStromboli at 8.3 ± 2.1 to 18.1 ± 4.5kg/s (or 718–1565 tons/day). These inferred fluxes fall within the range of earlier observations at Stromboli. They also agree well with contemporaneous CO2 flux determinations (8.4–20.1kg/s) obtained using a standard approach that combines Multi-GAS-based in-plume readings of the CO2 /SO2 ratio (≈8) with UV-camera sensed SO2 fluxes (1.5–3.4kg/s). We conclude that DIAL-lidars offer new prospects for safer (remote) instrumental observations of the volcanic CO2 flux.
Aiuppa, A., Fiorani, L., Santoro, S., Parracino, S., D'Aleo, R., Liuzzo, M., et al. (2017). New advances in dial-lidar-based remote sensing of the volcanic CO2 flux. FRONTIERS IN EARTH SCIENCE, 5 [10.3389/feart.2017.00015].
New advances in dial-lidar-based remote sensing of the volcanic CO2 flux
Aiuppa, Alessandro
;Santoro, Simone;D'Aleo, Roberto;
2017-01-01
Abstract
We report here on the results of a proof-of-concept study aimed at remotely sensing the volcanic CO2 flux using a Differential Adsorption lidar (DIAL-lidar). The observations we report on were conducted in June 2014 on Stromboli volcano, where our lidar (LIght Detection And Ranging) was used to scan the volcanic plume at ∼3km distance from the summit vents. The obtained results prove that a remotely operating lidar can resolve a volcanic CO2 signal of a few tens of ppm (in excess to background air) over km-long optical paths. We combine these results with independent estimates of plume transport speed (from processing of UV Camera images) to derive volcanic CO2 flux time-series of ≈16–33min temporal resolution. Our lidar-based CO2 fluxes range from 1.8 ± 0.5 to 32.1 ±8.0kg/s, and constrain the daily averaged CO2 emissions fromStromboli at 8.3 ± 2.1 to 18.1 ± 4.5kg/s (or 718–1565 tons/day). These inferred fluxes fall within the range of earlier observations at Stromboli. They also agree well with contemporaneous CO2 flux determinations (8.4–20.1kg/s) obtained using a standard approach that combines Multi-GAS-based in-plume readings of the CO2 /SO2 ratio (≈8) with UV-camera sensed SO2 fluxes (1.5–3.4kg/s). We conclude that DIAL-lidars offer new prospects for safer (remote) instrumental observations of the volcanic CO2 flux.File | Dimensione | Formato | |
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