A Methodology for CO2 Retrieval Applied to Hyperspectral PRISMA Data
2021
Romaniello, Vito | Spinetti, Claudia | Silvestri, Malvina | Buongiorno, Maria Fabrizia
The aim of this work is to develop and test a simple methodology for CO₂ emission retrieval applied to hyperspectral PRISMA data. Model simulations are used to infer the best SWIR channels for CO₂ retrieval purposes, the weight coefficients for a Continuum Interpolated Band Ratio (CIBR) index calculation, and the factor for converting the CIBR values to XCO₂ (ppm) estimations above the background. This method has been applied to two test cases relating to the LUSI volcanic area (Indonesia) and the Solfatara area in the caldera of Campi Flegrei (Italy). The results show the capability of the method to detect and estimate CO₂ emissions at a local spatial scale and the potential of PRISMA acquisitions for gas retrieval. The limits of the method are also evaluated and discussed, indicating a satisfactory application for medium/strong emissions and over soils with a reflectance greater than 0.1.
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