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Report RSE 17001776

Greenhouse gas monitoring at the Plateau Rosa - 2016

The main purpose of this report is to illustrate concerning to the ongoing greenhouse gases monitoring activity at Plateau Rosa station. The year 2016 has shown an increasing of the CO2 concentration very likely caused by the strong El Niño event occurred during the last two years (2015-2016).

The main purpose of this report is to illustrate concerning to the ongoing greenhouse gases monitoring activity at Plateau Rosa station (3480m a.s.l.). The station is located at a typical elevation of the free atmosphere upon a large snow–clad bare mountain plateau and far from urban and polluted zones.

Owing to its high altitude and position, it is suitable for the background measurement of greenhouse gases. The Plateau Rosa CO2 dataset currently covers about 28 complete years: the last 23 years, from 1993 up to now, are related to continuous monitoring. The historical series of the monthly CO2 background concentrations, and other gas, was obtained by applying a filtering scheme, able to distinguish the background data from the data influenced by CO2 sources and sinks. The algorithm identifies as background values only that data characterized by a slow variability. The growth rate of the longest continuous historical series represented by CO2 data is equal to 2,018 ± 0,032 ppm. The year 2016 has shown an increasing of the CO2 concentration very likely caused by the strong El Niño event occurred during the last two years (2015-2016). Finally, by comparing the global emission data with the average of the annual background CO2 concentrations we have detected a significant relationship between these two quantities that could allow to use the measurements of CO2 as a predictor of the global emissions.

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