Temporal variability and geographical origins of airborne pollen grains concentrations from 2015 to 2018 at Saclay, France

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Sarda Estève, Roland
Baisnée, Dominique
Guinot, Benjamin
Petit, Jean-Eudes
Sodeau, John
O'Connor, David
Besancenot, Jean-Pierre
Thibaudon, Michel
Gros, Valérie
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The study of the origin and dispersion processes associated with airborne pollen grains are important to understand due to their impacts on health. In this context, a Hirst-type spore trap was utilized over the period 2015–2018 to monitor ambient pollen grains at Saclay, France, a receptor site influenced by both clean air masses originating from the Atlantic Ocean and polluted air masses under anticyclonic conditions. The objective of this work was to use ZeFir (a user-friendly, software tool recently-developed to investigate the geographical origin and point sources of atmospheric pollution) as a method to analyse total and allergenic airborne pollen grain concentrations. Strong interannual variability was exhibited for the total pollen grains concentrations and it was determined that this was mainly driven by Betulaceae pollen, with a general increasing trend displayed. The start of the pollen season was seen to be triggered by particular synoptic conditions after a period of dormancy and two maximums were displayed, one in April and a second in June. Results from the ZeFir tool, fed with on-site hourly meteorological and pollen measurements, demonstrate that the dominant pollen grains inputs to Saclay are favoured by non-prevailing winds originating from East and North in association with dry air, moderate winds, mild temperature and enhanced insolation.
Bioaerosol , Pollen , Source receptor model , Modelling , Health , Allergenic , Trajectory analysis , Air pollution
Estève, R.S., Baisnée, D., Guinot, B., Petit, J.E., Sodeau, J., O’Connor, D., Besancenot, J.P., Thibaudon, M. and Gros, V., 2018. Temporal Variability and Geographical Origins of Airborne Pollen Grains Concentrations from 2015 to 2018 at Saclay, France. Remote Sensing, 10(12), 1932 (23 pp.) DOI: 10.3390/rs10121932