Articles | Volume 8, issue 5
Solid Earth, 8, 1017–1024, 2017
https://doi.org/10.5194/se-8-1017-2017
Solid Earth, 8, 1017–1024, 2017
https://doi.org/10.5194/se-8-1017-2017

Short communication 29 Sep 2017

Short communication | 29 Sep 2017

Increasing CO2 flux at Pisciarelli, Campi Flegrei, Italy

Manuel Queißer1, Domenico Granieri2, Mike Burton1, Fabio Arzilli1, Rosario Avino3, and Antonio Carandente3 Manuel Queißer et al.
  • 1School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
  • 2Istituto Nazionale di Geofisica e Vulcanologia, sezione di Pisa, 50126 Pisa, Italy
  • 3Istituto Nazionale di Geofisica e Vulcanologia, sezione di Napoli, Osservatorio Vesuviano, 80124 Naples, Italy

Abstract. The Campi Flegrei caldera is located in the metropolitan area of Naples (Italy) and has been undergoing different stages of unrest since 1950, evidenced by episodes of significant ground uplift followed by minor subsidence, increasing and fluctuating emission strengths of water vapor and CO2 from fumaroles, and periodic seismic crises. We deployed a scanning laser remote-sensing spectrometer (LARSS) that measured path-integrated CO2 concentrations in the Pisciarelli area in May 2017. The resulting mean CO2 flux is 578 ± 246 t d−1. Our data suggest a significant increase in CO2 flux at this site since 2015. Together with recent geophysical observations, this suggests a greater contribution of the magmatic source to the degassing and/or an increase in permeability at shallow levels. Thanks to the integrated path soundings, LARSS may help to give representative measurements from large regions containing different CO2 sources, including fumaroles, low-temperature vents, and degassing soils, helping to constrain the contribution of deep gases and their migration mechanisms towards the surface.

Download
Short summary
Campi Flegrei is a volcanic caldera that is currently in a state of increased unrest. We used a novel remote-sensing approach to measure CO2 fluxes at the Campi Flegrei. Thanks to its comprehensive spatial coverage, the instrument used gives more representative measurements from large regions containing different CO2 sources. We find an increase in CO2 degassing strength. This suggests a greater contribution of the magmatic source to the degassing.