Local and global anthropic thermal influence at Fabra observatory for the period 1924–2016
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Abstract
This article shows a first approach in the differentiation between the local and global contribution in the increase of the air temperature in Barcelona. Accordingly, the local influence of the Barcelona metropolitan area on the increase of air temperature is assessed by the recorded data at the Fabra observatory for the period 1924–2016; and then, it is compared with the Ebro observatory’s (reference observatory), which only presents a global warming influence as it is located in a rural zone.
The results show that the temperature recorded in the Fabra observatory has a significant increasing trend; in the term 1924-2016, where the increase of the average monthly temperature was identified in 1,26 °C. The increasing temperature rate recorded for the subperiod 1972–2016 in the Fabra observatory was faster than the one registered for the subperiod 1924–1971, coinciding with the years in which climate change researches have shown more conclusive results of the anthropogenic influence in the increase of air temperature. In this subperiod, the results indicate that the Fabra observatory registered a local thermal influence of the Barcelona metropolitan area which contributes in an increase of 0,0073 °C/year in the average annual temperature, whereas the contribution of the global warming, registered at Ebro observatory, corresponded to an increase of 0,0386 °C/year.
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