Attributing the Trends of Airborne Birch and Grass Pollen Levels
Willem W Verstraeten1, Nicolas Bruffaerts2, Rostislav Kouznetsov3, Mikhail Sofiev3 and Andy W Delcloo1, (1)Royal Meteorological Institute, Observations, Ukkel, Belgium, (2)Sciensano, Elsene, Belgium, (3)Finnish Meteorological Institute, Helsinki, Finland
