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Thirty Years of Atmospheric CO2 Observations at the Plateau Rosa Station, Italy

1
Ricerca sul Sistema Energetico—RSE S.p.A., Via R. Rubattino, n. 54, 20134 Milano, Italy
2
Dipartimento di Fisica, Università di Torino, Via P. Giuria, n.1, 10125 Torino, Italy
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(7), 418; https://doi.org/10.3390/atmos10070418
Received: 31 May 2019 / Revised: 1 July 2019 / Accepted: 17 July 2019 / Published: 20 July 2019
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Abstract

The atmospheric background CO2 concentration is a key quantity for the analysis and evaluation of the ongoing climate change. Long-term CO2 observations have been carried out at the high Plateau Rosa mountain station, in the north-western Alps since 1989. The complete time series covers thirty years, and it is suitable for climatological analysis. The continuous CO2 measurements, collected since 1993, were selected, by means of a BaDS (Background Data Selection) filter, to obtain the hourly background data. The monthly background data series was analysed in order to individuate the parameters that characterise the seasonal cycle and the long-term trend. The growth rate was found to be 2.05 ± 0.03 ppm/year, which is in agreement with the global trend. The increased background CO2 concentration at the Plateau Rosa site is the consequence of global anthropic emissions, whereas the natural variability of the climatic system taken from the SOI (South Oscillation Index) and MEI (Multivariate ENSO Index) signals was detected in the inter-annual changes of the Plateau Rosa growth rate. View Full-Text
Keywords: Plateau Rosa station; background CO2 time series; BaDS filter; CO2 growth rate; climatic variability indexes Plateau Rosa station; background CO2 time series; BaDS filter; CO2 growth rate; climatic variability indexes
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Apadula, F.; Cassardo, C.; Ferrarese, S.; Heltai, D.; Lanza, A. Thirty Years of Atmospheric CO2 Observations at the Plateau Rosa Station, Italy. Atmosphere 2019, 10, 418.

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