Articles | Volume 20, issue 9
Nat. Hazards Earth Syst. Sci., 20, 2483–2501, 2020
https://doi.org/10.5194/nhess-20-2483-2020
Nat. Hazards Earth Syst. Sci., 20, 2483–2501, 2020
https://doi.org/10.5194/nhess-20-2483-2020
Research article
18 Sep 2020
Research article | 18 Sep 2020

Intra-annual variability of the Western Mediterranean Oscillation (WeMO) and occurrence of extreme torrential precipitation in Catalonia (NE Iberia)

Joan Albert Lopez-Bustins et al.

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Short summary
We considered the Western Mediterranean Oscillation index (WeMOi) to analyse the occurrence of extreme torrential episodes (≥ 200 mm in 24 h) over Catalonia (NE Iberia) during the 1951–2016 period. Principal results reveal the occurrence of 50 episodes, mainly in autumn, especially during the second 10 d period of October (11–20), coinciding with the most negative WeMOi values of the year. Seasonal changes in these episodes and in WeMOi values might be due to sea warming.
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