What's in the air?
Factors in the type of pollen
Importance of wind
How is pollen count measured?
- Pollen traps: To effectively capture airborne pollen, strategically placed pollen traps are used. These traps are equipped with a rotating shaft fitted with adhesive paper. As the shaft slowly rotates, it sucks in air and traps particles in the paper, allowing for later analysis. The collected pollen is then meticulously examined under a microscope and quantified in quantity per cubic meter of air. These measurements are simplified for public use and provide forecasts ranging from low to high pollen levels.
- Microscopic analysis: The microscopic analysis process involves the examination and enumeration of pollen grains obtained from the samples. Trained professionals employ microscopy methods to differentiate various types of pollen, making it easier to accurately quantify pollen particles originating from specific plants known to cause allergies.
- Pollen counting networks: In different regions and countries, networks of monitoring stations diligently collect data on pollen levels. Using various techniques, including pollen traps, these stations collect samples for analysis. The resulting information is then compiled and evaluated, providing accurate information on pollen concentrations in various locations.
Factors affecting pollen count
- Season: Pollen counts vary depending on the time of year. In temperate climates, tree pollen prevails in spring, grass pollen prevails in summer, and weed pollen prevails in late summer and fall.
- Climate: Several climate factors, such as temperature, humidity, wind speed, and precipitation, can significantly affect pollen counts. Warm, dry, and windy conditions help pollen disperse, increasing levels, while rain or high humidity can temporarily reduce pollen levels.
- Geography: Different areas exhibit different vegetation patterns, resulting in different types and amounts of pollen. In general, urban areas tend to have lower counts due to the lower presence of flowering plants compared to rural or forested areas.