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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Cited articles

Alfieri, L., Burek, P., Feyen, L., and Forzieri, G.: Global warming increases the frequency of river floods in Europe, Hydrol. Earth Syst. Sci., 19, 2247–2260, https://doi.org/10.5194/hess-19-2247-2015, 2015. 
Arbiol-Roca, L., Lopez-Bustins, J. A., and Martin-Vide, J.: The role of the WeMOi in the occurrence of torrential rainfall in Catalonia (NE Iberia), in: Abstracts book: 6th International Conference on Meteorology and Climatology of the Mediterranean (MetMed), ACAM, Zagreb, Croatia, 2017. 
Arbiol-Roca, L., Lopez-Bustins, J. A., Esteban-Vea, P., and Martin-Vide, J.: Cálculo del índice de la Oscilación del Mediterráneo Occidental con técnicas de análisis multivariante, in: El Clima: Aire, Agua, Tierra y Fuego, edited by: Montávez-Gómez, J. P., Gómez-Navarro, J. J., López-Romero, J. M., Palacios-Peña, L., Turco, M., Jerez-Rodríguez, S., Lorente, R., and Jiménez-Guerrero, P., Asociación Española de Climatología (AEC), Cartagena, Spain, 761–771, 2018. 
Armengot, R.: Las lluvias intensas en la Comunidad Valenciana, Ministerio de Medio Ambiente, Dirección General del Instituto Nacional de Meteorología, Madrid, Spain, 263 pp., 2002. 
Azorin-Molina, C. and Lopez-Bustins, J. A.: An automated sea breeze selection based on regional sea-level pressure difference: WeMOi, Int. J. Climatol., 28, 1681–1692, https://doi.org/10.1002/joc.1663, 2008. 
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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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