As pollengrains are are very, very small you’ll need for example a microscope to identify the type of pollen. The pollengrains are fixed on sticky tape, put on a glass microscope slide and can be analysed by a microscope. There are also techniques which don’t use the “light part of the spectrum” using microscope and […]
The process starts bottom left with trees, grasses or herbs producing pollen, which become airborn. Step 1. Collect & fix pollen Collecting these pollen from the air with some kind of vacuum cleaner. Of course the volume of air processed in a certain period of time is important since you want information about the concentration […]
This graph is an example of pollenconcentration during three different types of days. Day 1 shows airborn pollen between 9:00 and 17:00. Day 2 shows a pollenpeak during the early morning hours. Day 3 shows a peak in the evening. Weatherconditions, like a rainshower, a sunny or cloudy day, have big influence on the hourly […]
About Ambrosia Ragweeds are flowering plants in the genus Ambrosia in the aster family, Asteraceae. They are distributed in the tropical and subtropical regions of the New World, especially North America, where the origin and center of diversity of the genus are in the southwestern United States and northwestern Mexico. Several species have been introduced […]
This calendar shows when specific trees are flowering (in the Netherlands). The calendar is video-based. Every tree is explained by a short video. Corylus aveilana Alnus incana Alnus glutinosa Salix viminalis Taxus Bacatta Populus x more Carpinus Betulus Betula pendula more information >> Fagus sylvatica Quercus robur […]
This example calendar shows when specific grasses are flowering (in the Netherlands). The calendar is video-based. Every grasstype is explained by a short video. Alopecurus pratensis Image: Alopecurus pratensis, Meadow foxtail. Five stages in ripening of the inflorescense and opening of the anthers to free pollen. more information >> Dactylis glomerata Poa pratensis Anthoxanthum odoratum […]
Are winddirection, pollenconcentration and pollenpressure correlated? It very much depends on your location. This graph shows that for the Netherlands a south-east wind is less favourable, as it can bring pollen from Germany and Belgium. When you live on a small island like Helgaland, every winddirection is favourable. Besides winddirection also windspeed is correlated.
Are windspeed and pollenconcentration correlated? It seems that in periods with a low windspeed the average complainlevel is higher that during periods of high windspeed. A more detailed graph is not available yet.
Are temperature and pollenconcentrations related? This graph shows the correlation between the average complainlevel and the temperature during two months.
Are rain and pollenconcentrations correlated? There seems little doubt about that. Rain can wash the air clean from pollen. This graph shows the correlation between the average complainlevel (purple) and rainfall (blue) during two months. The rainfall seems to press down the complainlevel. On the other hand a short rain shower, can trigger pollenrelease by […]