| long-range transport of beech (fagus sylvatica l.) pollen to catalonia (north-eastern spain). | local and long-range transport of beech (fagus sylvatica) pollen was analysed by using 23-year data (1983-2007) at six stations in catalonia, spain, and numerical simulations. back trajectories and synoptic meteorology indicated a consistent north european provenance during beech pollen peak days. specifically, the area from northern italy to central germany was the most probable source, as indicated by a source-receptor model based on back trajectories. for the event with the highest pollen lev ... | 2008 | 18496718 |