Elevated Pollen Count in the Atmosphere
In mainland Portugal, the Portuguese Society of Allergology and Clinical Immunology (SPAIC) has forecasted high pollen concentrations in the air until May 29. The highest pollen levels are anticipated for olive, pine, birch, cork oak, oak, and grasses, as well as plantain, sorrel, nettle, and urticaceae (including pellitory). Particularly in the Lisbon district, the capital city and municipality of Setúbal will see the most pollen from these trees and herbs.
In contrast, the Autonomous Region of Madeira is predicted to have low pollen levels, with cypress, pine, eucalyptus trees, and herbs such as grasses, plantain, chenopodium, sorrel, nettle, and urticaceae (including pellitory) contributing to the pollen count. Meanwhile, the concentration of pollen in the atmosphere will be low in the Autonomous Region of the Azores, with a focus on cypress (and/or cryptomeria) and pine trees, and grasses, plantain, nettle, and urticaceae (including pellitory). Specifically, Ponta Delgada is of note in this region.
Compared to mainland Portugal, Madeira and the Azores typically have lower pollen concentrations. The primary pollen sources in the islands are conifers like cypress and pine, and eucalyptus, where broadleaf trees are more prominent on the continent. In mainland Portugal, regions such as Trás-os-Montes and Alto Douro, Entre Douro and Minho, Beira Litoral, Beira Interior, Lisbon and Setúbal, Alentejo, and Algarve are among those with high pollen levels. The pollen concentration period ranges from February to October, peaking between April and July.
Portugal's mainland, particularly the Lisbon district, experiences high pollen concentrations primarily from olive, pine, birch, cork oak, oak, grasses, plantain, sorrel, nettle, and urticaceae, while Madeira and the Azores, including Ponta Delgada, have lower pollen levels from cypress, pine, eucalyptus, grasses, plantain, chenopodium, sorrel, nettle, and urticaceae, with a focus on conifers and broadleaf trees in the islands. In contrast, mainland Portugal's pollen sources are more diverse, including olive, pine, birch, cork oak, oak, and various weeds.
