A Framework for the Datasets of CRDS CO 2 and CH 4 Stable Carbon Isotope Measurements in the Atmosphere

Francesco D’Amico (), Ivano Ammoscato, Giorgia De Benedetto, Luana Malacaria, Salvatore Sinopoli, Teresa Lo Feudo, Daniel Gullì and Claudia Roberta Calidonna
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Francesco D’Amico: Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Area Industriale Comparto 15, I-88046 Lamezia Terme, Catanzaro, Italy
Ivano Ammoscato: Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Area Industriale Comparto 15, I-88046 Lamezia Terme, Catanzaro, Italy
Giorgia De Benedetto: Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Area Industriale Comparto 15, I-88046 Lamezia Terme, Catanzaro, Italy
Luana Malacaria: Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Area Industriale Comparto 15, I-88046 Lamezia Terme, Catanzaro, Italy
Salvatore Sinopoli: Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Area Industriale Comparto 15, I-88046 Lamezia Terme, Catanzaro, Italy
Teresa Lo Feudo: Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Area Industriale Comparto 15, I-88046 Lamezia Terme, Catanzaro, Italy
Daniel Gullì: Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Area Industriale Comparto 15, I-88046 Lamezia Terme, Catanzaro, Italy
Claudia Roberta Calidonna: Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Area Industriale Comparto 15, I-88046 Lamezia Terme, Catanzaro, Italy

Data, 2025, vol. 10, issue 9, 1-9

Abstract: Accessible datasets of greenhouse gas (GHG) concentrations help define long-term trends on a global scale and also provide significant information on the characteristic variability of emission sources and sinks. The integration of stable carbon isotope measurements of carbon dioxide (CO 2 ) and methane (CH 4 ) can significantly increase the accuracy and reliability of source apportionment efforts, due to the isotopic fractionation processes and fingerprint that characterize each mechanism. Via isotopic parameters such as δ 13 C, the ratio of 13 C to 12 C compared to an international standard (VPDB, Vienna Pee Dee Belemnite), it is in fact possible to discriminate, for example, between thermogenic and microbial sources of CH 4 , thus ensuring a more detailed understanding of global balances. A number of stations within the Italian consortium of atmospheric observation sites have been equipped with Picarro G2201-i CRDS (Cavity Ring-Down Spectrometry) analyzers capable of measuring the stable carbon isotopic ratios of CO 2 and CH 4 , reported as δ 13 C-CO 2 and δ 13 C-CO 2 , respectively. The first dataset (Lamezia Terme, Calabria region) of the consortium resulting from these measurements was released, and a second dataset (Potenza, Basilicata region) from another station was also released, relying on the same format to effectively standardize these new types of datasets. This work provides details on the data, format, and methods used to generate these products and describes a framework for the format and processing of similar data products based on CRD spectroscopy.

Keywords: stable carbon isotopes; δ 13 C; atmospheric measurements; carbon dioxide; methane; VPDB; CRDS; dataset (search for similar items in EconPapers)
JEL-codes: C8 C80 C81 C82 C83 (search for similar items in EconPapers)
Date: 2025
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