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Title
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La variabilitat interdecadal de lOscil·lació de lAtlàntic Nord com a possible determinant de la freqüència de rierades a Arenys
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Author
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Abstract
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| People from the Catalan coastline have always been concerned about the frequency of floods in their sand rivers. In this paper, we investigate possible factors explaining the interdecadal variability observed in the frequency of flooding in the Arenys sandriver (NE Iberian Peninsula), previously described by other authors and discussed during the seminar Les rierades del Maresme (21 May 2013) held in Mataró (Barcelona). Thus, we analysed the time series of the number of floods in the Arenys sand river and the historical record of flooding in Catalonia, to correlate them with the number of sunspots per year, the teleconnection indices of El Niño-Southern Oscillation, the North Atlantic Oscillation and the Western Mediterranean Oscillation and the meteorological record of the Fabra Observatory (Collserola, Barcelona). Our results point out a positive correlation between the North Atlantic Oscillation and the frequency of floods in the Arenys sand river on an interdecadal scale, both showing oscillations cycles of approximately 60 years. At the end of the paper, we briefly discuss the possible geological, ecological and social implications of this purported interdecadal periodicity. |
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Language
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English
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Source (journal)
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L'Atzavara
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Publication
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2015
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Volume/pages
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25
(2015)
, p. 117-124
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Full text (open access)
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