Transporte anómalo de humedad relacionado con la llegada de ciclones extratropicales a la península ibérica

Abstract

The Iberian Peninsula (IP) is often affected by extreme extratropical cyclone (EC)-related hydrometeorological events. The anomalous moisture uptake (AMU) related to landfalling ECs over the IP between 1985-2014 is analyzed through a Lagrangian approach. We performed our analysis in terms of hydrological years and their classification into extremely wet, wet and normal. The results show that wet and extremely wet hydrological years exhibit higher values of days under cyclonic influence. Annual EC-related positive AMU for wet and normal periods exhibits higher values near the landfall region, in agreement with the local convergence of water vapour along the pathways. Principally, the annual wet period was characterized by a displacement of the AMU inner lower central North Atlantic, Western Mediterranean and Cantabrian Sea.