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Ghasemifard, H.* ; Ghada, W.* ; Estrella, N.* ; Lüpke, M.* ; Oteros, J. ; Traidl-Hoffmann, C. ; Damialis, A. ; Buters, J.T.M. ; Menzel, A.*

High post-season Alnus pollen loads successfully identified as long-range transport of an alpine species.

Atmos. Environ. 231:117453 (2020)
Postprint DOI
Open Access Green
Alnus pollen is one of the Northern Hemisphere's major aeroallergens. In Central Europe, the genus is represented by three species (Alnus glutinosa, Alnus incana, and Alnus viridis). The most common one, A. glutinosa (L.) Gaertn., is widespread in lowland riparian forests, swamps, and forest edges. However, to date is still unknown if all of them - in terms of pollen exposure - are clinically relevant for sensitized individuals. To investigate the associated pollen exposure, particularly also because of long-range transport of airborne pollen, we used backward air mass trajectories and tested this method for the year 2015, based on daily /thus pollen concentrations at 26 sites in Bavaria, Germany. A. glutinosa's main pollen season extends from February to March, but a six-day, post-season episode was additionally identified in June. For this episode and all sites, 72-h backward trajectories were calculated at 3-h intervals using high spatial and temporal resolution ERAS reanalysis data and the HYS-PLIT (hybrid single-particle Lagrangian integrated trajectory) model. This backward trajectory method identified air masses from the alpine region in Switzerland and Austria, where relevant areas of A. viridis (Chaix) DC as potential pollen sources exist. These may explain the post-season episode in June, as additionally confirmed by its unique spatial distribution, by a considerably later flowering period, and by repeated long-range transport events as observed in a 23-year pollen time series.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Pollen ; Alnus ; Green Alder ; Backward Air Mass Trajectories ; Hysplit ; Off-season; Airborne Pollen; Distance Transport; Ambrosia Pollen; Birch Pollen; Hay-fever; Land-use; Poland; Impact; Valley; Dispersion
ISSN (print) / ISBN 1352-2310
e-ISSN 1873-2844
Journal Atmospheric Environment
Quellenangaben Volume: 231, Issue: , Pages: , Article Number: 117453 Supplement: ,
Publisher Elsevier
Publishing Place The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1gb, England
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute for Allergy Research (IAF)
Institute of Environmental Medicine (IEM)