title: A new frontier in CO2flux measurements using a highly portable DIAL laser system.
abstract: Volcanic CO2emissions play a key role in the geological carbon cycle, and monitoring of volcanic CO2fluxes helps to forecast eruptions. The quantification of CO2fluxes is challenging due to rapid dilution of magmatic CO2in CO2-rich ambient air and the diffuse nature of many emissions, leading to large uncertainties in the global magmatic CO2flux inventory. Here, we report measurements using a new DIAL laser remote sensing system for volcanic CO2(CO2DIAL). Two sites in the volcanic zone of Campi Flegrei (Italy) were scanned, yielding CO2path-amount profiles used to compute fluxes. Our results reveal a relatively high CO2flux from Campi Flegrei, consistent with an increasing trend. Unlike previous methods, the CO2DIAL is able to measure integrated CO2path-amounts at distances up to 2000 m using virtually any solid surface as a reflector, whilst also being highly portable. This opens a new frontier in quantification of geological and anthropogenic CO2fluxes.
authors.affiliation: School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Oxford Road, Manchester M139PL, UK.
authors.forename: Manuel
authors.initials: M
authors.lastname: Queiβer
authors.affiliation: Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione di Pisa, 50126 Pisa, Italy.
authors.forename: Domenico
authors.initials: D
authors.lastname: Granieri
authors.affiliation: School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Oxford Road, Manchester M139PL, UK.
authors.forename: Mike
authors.initials: M
authors.lastname: Burton