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The viewer provides the forecasted hourly concentrations of ground-level pollen for alder, birch, grass, olive, ragweed and mugwort (based on satellite data processed by CAMS).

To select the allergenic plant species, date and region of interest, click on this icon in the viewer:

To view the map in full screen mode, click on this item in the viewer:

To view a chart showing the changes in hourly ground-level pollen concentrations over the forecast period in a given location:



Click on the map

The classification of the hourly pollen concentrations in ambient air follows the one used by the System for Integrated modeLling of Atmospheric composition (SILAM), which is based on clinically relevant thresholds of pollen concentrations suggested by the European Academy of Allergy and Clinical Immunology (EAACI) and expert knowledge. For alder, birch, olive and mugwort, concentrations ≥ 10 pollen/m3 demarcate the pollen season and concentrations ≥ 100 pollen/m3 demarcate the peak pollen period (Pfaar et al., 2017). For grass and ragweed, concentrations ≥ 3 pollen/m3 demarcate the pollen season and concentrations ≥ 50 pollen/m3 demarcate the peak pollen period (Pfaar et al., 2017; 2020).

Additional information

References

  • Pfaar, O., et al., 2017, Defining pollen exposure times for clinical trials of allergen immunotherapy for pollen-induced rhinoconjunctivitis - an EAACI position paper, Allergy 72(5), pp. 713-722. https://doi.org/10.1111/all.13092
  • Pfaar, O., et al., 2020, Pollen season is reflected on symptom load for grass and birch pollen‐induced allergic rhinitis in different geographic areas—An EAACI Task Force Report, Allergy 75(5), pp. 1099-1106. https://doi.org/10.1111/all.14111

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