TY - JOUR T1 - Comparative long-term trend analysis of daily weather conditions with daily pollen concentrations in Brussels, Belgium. JF - Int J Biometeorol Y1 - 2018 A1 - Nicolas Bruffaerts A1 - Tom De Smedt A1 - Andy Delcloo A1 - Koen Simons A1 - Lucie Hoebeke A1 - Caroline Verstraeten A1 - An Van Nieuwenhuyse A1 - Ann Packeu A1 - Marijke Hendrickx KW - Allergy KW - Climate change KW - Meteorological factors KW - pollen AB -

A clear rise in seasonal and annual temperatures, a gradual increase of total radiation, and a relative trend of change in seasonal precipitation have been observed for the last four decades in Brussels (Belgium). These local modifications may have a direct and indirect public health impact by altering the timing and intensity of allergenic pollen seasons. In this study, we assessed the statistical correlations (Spearman's test) between pollen concentration and meteorological conditions by using long-term daily datasets of 11 pollen types (8 trees and 3 herbaceous plants) and 10 meteorological parameters observed in Brussels between 1982 and 2015. Furthermore, we analyzed the rate of change in the annual cycle of the same selected pollen types by the Mann-Kendall test. We revealed an overall trend of increase in daily airborne tree pollen (except for the European beech tree) and an overall trend of decrease in daily airborne pollen from herbaceous plants (except for Urticaceae). These results revealed an earlier onset of the flowering period for birch, oak, ash, plane, grasses, and Urticaceae. Finally, the rates of change in pollen annual cycles were shown to be associated with the rates of change in the annual cycles of several meteorological parameters such as temperature, radiation, humidity, and rainfall.

VL - 62 CP - 3 M3 - 10.1007/s00484-017-1457-3 ER -