994 resultados para Historical documents


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A partir de la constatació de la dispersió i varietat de fonts documentals que existeixen a Catalunya que fan referència al moviment llibertari i que fa difícil accedir-hi i conèixer-les en la seva totalitat, es va decidir fer aquest treball amb la intenció de sistematitzar i donar a conèixer els principals centres i les principals fonts documentals que aporten o poden aportar informació útil pel coneixement i l’estudi dels diferents aspectes relacionats amb el moviment llibertari a Catalunya (no es recopilen només els centres i fonts documentals sobre el tema que es poden consultar a Catalunya, sinó també aquells centres de la resta de l’Estat espanyol o d’altres llocs del món que conserven documentació relativa a Catalunya) des d’una perspectiva històrica, per tal que puguin ser utilitzades per tots aquells professionals relacionats amb la matèria i per totes aquelles altres persones que hi estiguin interessades.

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From 6 to 8 November 1982 one of the most catastrophic flash-flood events was recorded in the Eastern Pyrenees affecting Andorra and also France and Spain with rainfall accumulations exceeding 400 mm in 24 h, 44 fatalities and widespread damage. This paper aims to exhaustively document this heavy precipitation event and examines mesoscale simulations performed by the French Meso-NH non-hydrostatic atmospheric model. Large-scale simulations show the slow-evolving synoptic environment favourable for the development of a deep Atlantic cyclone which induced a strong southerly flow over the Eastern Pyrenees. From the evolution of the synoptic pattern four distinct phases have been identified during the event. The mesoscale analysis presents the second and the third phase as the most intense in terms of rainfall accumulations and highlights the interaction of the moist and conditionally unstable flows with the mountains. The presence of a SW low level jet (30 m s-1) around 1500 m also had a crucial role on focusing the precipitation over the exposed south slopes of the Eastern Pyrenees. Backward trajectories based on Eulerian on-line passive tracers indicate that the orographic uplift was the main forcing mechanism which triggered and maintained the precipitating systems more than 30 h over the Pyrenees. The moisture of the feeding flow mainly came from the Atlantic Ocean (7-9 g kg-1) and the role of the Mediterranean as a local moisture source was very limited (2-3 g kg-1) due to the high initial water vapour content of the parcels and the rapid passage over the basin along the Spanish Mediterranean coast (less than 12 h).