TO The concentration of pollen in the atmosphere may increase in mainland Portugal. starting Monday, reaching moderate to high risk values, if the forecast of an end to the rains and an increase in temperature is confirmed.
The information is contained in the Pollen Bulletin of the Portuguese Society of Allergology and Clinical Immunology (SPAIC) corresponding to the week of May 3 to 9 and published this Thursday.
“During the weekend, the pollen concentration is expected to remain between low and moderate, due to the ‘atmospheric washing’ effect, caused by precipitation, which is expected to occur in mainland Portugal,” the bulletin says.
The SPAIC forecast is that from the 6th Allergic patients are at high risk in the regions. from Beira Litoral, Beira Interior, Lisbon and Setúbal, Alentejo and Algarve, with the risk being moderate to high in Trás-os-Montes and Alto Douro and in Entre Douro and Miño.
For the autonomous regions of Madeira and Azores, The forecast for next week is for low pollen concentration..
SPAIC recommends “being attentive to the weather forecast, to complement the pollen forecast.”
Regarding the origin of pollen grains, the main ones on the continent are “of the olive trees, pines, oaks, holm oaks and cork oaks and aromatic herbs, plantain, nettle, sorrel and nettles (includes parietaria).”
In the regions of the Algarve, Alentejo, Lisbon and Setúbal and also in the Madeira archipelago in particular “chenopodium pollination is observed” and in the north and center of the country. Birch pollen stands out.
In Madeira and the Azores, the pollen “will come mainly” from pines and cypresses (and/or cryptomeria in the largest of the archipelagos) and from urticaceae herbs (including parietaria), nettle, plantain and grasses.
Source: Observadora
