Recientemente han sido varios los trabajos que han analizado las tendencias en la precipitación dependiendo del tipo de flujo que la ha producido. Esta metodología novedosa ya se ha aplicado en el análisis de las precipitaciones en la Comunidad Valenciana, según tres tipos sinópticos básicos que las provocan: 1) precipitaciones convectivas, 2) de tipo frontal, y 3) las advecciones mediterráneas (Frente de Retroceso), detectándose tendencias significativas que no habrían sido detectadas con otro enfoque o metodología. El objetivo de este trabajo es ampliar este análisis mediante un estudio comparativo entre los dominios hidrográficos del Segura y del Júcar, y dentro de estos, los subdominios o sectores interiores frente a litorales. La utilización sólo de las series disponibles con 50 años, y de técnicas de análisis más fiables, nos va a permitir validar estas tendencias. Los resultados obtenidos muestran tendencias claras al descenso de la precipitación en el caso de las advecciones atlánticas, y ahora también en las del Norte (retroceso seca), significativas en el interior, y de menor peso o compensadas en el litoral. Además, se detectan paralelismos, junto con alguna diferencia, entre ambos dominios analizados. Palabras clave: inputs de precipitación, tendencias, análisis territorial comparativo, frente de retroceso, desagregación de la precipitación.

Previous papers from the CEAM Group in relation to the analysis of precipitation by meteorological origin, have permitted the detection of negative trends in the precipitation for frontal systems and continental advections (Northern) in the last 50 years. These negative trends have had important repercussions in the inland areas of the Valencia Region and not on the coast. The objective of this work is to analyze if the same decreasing trends can be detected in the precipitations from the Atlantic origin in areas of the interior of the Iberian Peninsula. In order to do that we have worked in two sectors, the North and the South of the Central System. We worked with the same methodology of desaggregation. The results not only confirm the hypothesis of precipitation decrease but show generalized trends in decreasing totals precipitations, especially in the North of the Central System.

The article analyses the waterspouts recorded in the Balearic Islands (Spain) between 1989 and 2020. The extensive database used includes 234 waterspout events, which we analysed to establish their annual, monthly, seasonal and weekly spatial, temporal and hourly distribution. The autumn months account for 65% of all the waterspout events, with the highest frequency seen in September. They occur most frequently between 8:00 and 10:00 in the morning. We carried out a synoptic classification of the days on which waterspouts were recorded, observing that a synoptic trough pattern at 500 hPa over the Iberian Peninsula, which generates a south-westerly flow over the area under study, was the most conducive waterspout-creating condition (present in 25.3% of the events). Their relationship with the sea surface temperature was also analysed, revealing a higher frequency of waterspouts with higher temperature values, particularly between 23 and 26 °C. Finally, we examined the frequency of waterspouts in relation to the daily Western Mediterranean Oscillation regional teleconnection pattern index values, finding that waterspouts were more common on days when the indices were closer to 0.