EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Remote SO2 flux by UV and TIR ground based cameras at Sabancaya volcano (Peru), cross comparison and validation with satellite data 

Stefano Corradini1, Giuseppe Salerno2, Robin Campion2, Lorenzo Guerrieri1, Luca Merucci1, and Dario Stelitano1
Stefano Corradini et al.
  • 1Istituto Nazionale di Geofisica e Vulcanologia (INGV), ONT, Rome, Italy (
  • 2Istituto Nazionale di Geofisica e Vulcanologia (INGV), OE, Catania (

During the 14th IAVCEI Field Workshop held in Peru from 6 to 14 November 2022, SO2 plume measurements were carried out remotely in the volcanic plume of Sabancaya volcano. Sabancaya is an active stratovolcano located in southern Peru (15.787°S, 71.857°W), Sabancaya’s first historical record of an eruption dates to 1750 and the most recent eruption began in November 2016. Volcanic activity consist of rhythm vulcanian explosions, which produce a gas-ash rich plumes which rose few km above the summit terrace. On 10 and 11 November 2022, side-by-side observation by UV and TIR ground-based cameras were remotely carried out with the object to observe the passive and active SO2 burden from the volcanic plume of Sambacaya. Two UV cameras systems were employed observing the volcanic plume at 2- and 5-seconds time steps and calibrating SO2 amounts by coupling SO2 DOAS inverted column densities ad and SO2-quartz cell amounts. The TIR camera (named VIRSO2) is a novel system developed for the detection of volcanic plumes, the estimation of the height and the determination of columnar content and the SO2 flux. It allows acquisition of high frequency data both during the day and at night. It is equipped with 3 cameras, two broadband TIR (7-14 micron) and a VIS, capable of acquiring data simultaneously. For the quantitative estimation of SO2, an 8.7 μm filter is installed in front of one of the TIR camera. Retrieved cameras products were cross-compared and validated in order to determinate limit an uncertainty of both methods and results were also compared with those obtained by S5p-TROPOMI instrument.

Preliminary results show a feasible strength between the three ground and space-based techniques. Within the uncertainties of each method, differences between inverted SO2 column densities and emission rates arise from field of view geometrical sampling set-up and radiative transfer. Results gathered in this study prove the promising application of ground-based TIR in volcanic plume SO2 observation.

How to cite: Corradini, S., Salerno, G., Campion, R., Guerrieri, L., Merucci, L., and Stelitano, D.: Remote SO2 flux by UV and TIR ground based cameras at Sabancaya volcano (Peru), cross comparison and validation with satellite data , EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-11832,, 2023.