New Advances in Dial-Lidar-Based Remote Sensing of the Volcanic CO2 Flux

Frontiers in Digital Humanities

Fiorani, Luca¹  Aleo, Roberto¹  Nuvoli, Marcello²  D'³  Aiuppa, Alessandro³  Liuzzo, Marco⁴  Maio, Giovanni⁴  Parracino, Stefano⁵  Santoro, Simone⁶ 

[1] di Palermo, Palermo, Italy;Department of Industrial Engineering, University of Rome “Tor Vergata”, Rome, Italy;Dipartimento DiSTeM, UniversitàENEA Guest, Frascati, Italy;Fusion and Technology for Nuclear Safety and Security Department, ENEA, Frascati, Italy;Istituto Nazionale di Geofisica e Vulcanologia, Palermo, Italy

关键词: Stromboli;    remote sensing;    CO2 flux;    Volcanic CO2;    DIAL-LIDAR;   

DOI  :  10.3389/feart.2017.00015

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

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 on June 2014 on Stromboli volcano, where our lidar (LIght Detection And Ranging) was used to scan the volcanic plume from ~ 3 km 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 ≈16-33 minutes temporal resolution. Our lidar-based CO2 fluxes range from 1.8±0.5 to 32.1±8.0 kg/s, and constrain the daily averaged CO2 emissions from Stromboli at 8.3±2.1 to 18.1±4.5 kg/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 (8.4-20.1 kg/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 (1.5-3.4 kg/s). We conclude that DIAL-lidars offer new prospects for safer (remote) instrumental observations of the volcanic CO2 flux.

【 授权许可】

CC BY