Weekly aeropollen concentration in Palencia city, 1990-92

Abstract

The aim of this work is to present the data of the pollen concentrations in the atmosphere of Palencia city. It was recorded over three consecutive years of sampling (1990-92). A volumetric pollen trap of active filtration, type CAP2, was used. During this time, 88 different pollen types were identified, 27 occured at more than 0,15% of the total pollen recorded annually. These types formed the main pollen spectrum of this sampling station. Pollen coming from herbaceous species (Poaceae, Chenopodiaceae, Plantago, Urtica, etc.) was predominant (53,79%); arboreal pollen (Quercus, Populus, Cupressaceae, etc.) represented 42,11%, and pollen coming from shrub species (Ericaceae, Sambucus, etc.) only represented 4,10%. May and June was the time of the year, with the maximum pollen emission concentrated in the air. This was due to the quantities of pollen coming from Poaceae and Quercus, which together represented 47,25% of the pollen recorded over the three-year sample. Herbaceous pollen appeared throughout the year, with maximum concentrations recorded in spring, and coinciding with the maximum levels of arboreal pollen in the atmosphere.