Trends of some airborne tree pollen in the Nordic countries and Austria, 1980—1993

摘要: Abstract Long term trends in the occurrence of airborne pollen might help elucidating probability or unlikelihood developments which have been predicted theory such as global warming forest decline. We investigated and compared over a 14 year period (1980–1993) five selected common tree types (Alnus, Corylus, Betula, Pinus, Ulmus) from three sites North Europe (Stockholm, Trondheim, Turku) one Central (Vienna) terms start, peak, end, duration season, peak values annual totals, using data European bank. The existence has by calculating correlation against years statistical significance regression lines examined at 5% level (p<0.05). A consistent trend earlier commencement flowering season is observed all cases, well an incidence days. marked to end was also foun...