Suomeksi
 
 
Pollen monitoring and information
​The pollen season of grasses is long.
Daily pollen information in English will be provided at http://www.siitepoly.fi/en in the near future.

In each of the sampling sites, a Burkard sampler runs throughout the pollen season. The air suction volume of the trap is ten litres per minute. Airborne particles are trapped on sticky tape attached onto a clockwork, which rotates itself at a rate of 2 mm per hour. Thus, the hourly particle content in the air can be calculated. The tapes are sent by post to Turku for the analysis. In the sampling sites of  Helsinki (Skin and Allergy Hospital) and Imatra (Allergy and Environment Institute) the analysis is performed on the spot and mere results are sent to Turku for joint reporting. Pollen and spore reports are given on weekdays during the pollen season (usually from early March to September).
 
All pollen types are analysed from the tapes microscopically  although only a fraction carries allergenic significance. Counting is done using random sampling method for burkard tapes (Mäkinen, 1981). Special threshold values are applied to various types of pollen. When constructing a pollen report, the counts are described on a verbal scale as sparse, moderate or abundant. Generally, a majority of allergic persons experience symptoms when the concentration is abundant, while low counts provoke symptoms only in the most sensitive persons. The pollen reports can be obtained from various sources in the mass media.
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