Oct. 1, 2020
What have you been breathing during September? It turns out that there's quite a lot of pollen in the air!
The Canberra Pollen Monitoring team have been busily counting the daily pollen content for Canberra during the month of September and what we've found is nothing short of a "pollen-ami" of allergenic trees. The month of September s well known as a time for a diversity of tree pollen types (mostly introduced trees from Europe, Asia and the Americas) that all have the potential to cause hay fever or asthma in people susceptible to these conditions.
The graph below depicts the cascade of allergenic tree pollen types that characterized the month of September with a sequence of HIGH to EXTREME days occurring throughout the month - peaking during the week of the 15th-21st September. Cypress Pine and Pine tree pollen dominate the month pollen spectra with Birch pollen coming a close third. There were 12 out of 30 days where we saw one or more of the pollen types record HIGH* to EXTREME* levels in the pollen count. The tree pollen load will continue into October but is then overtaking by the grass pollen and other herbaceous pollen types such as Plantago and Patersons Curse pollen during November.
The graph depicts the daily pollen count classified according to the average number of grass pollen grains per cubic meter of air with the height of the graph related LOW to EXTREME levels increasing from 1-4 units: 1 = LOW (0-19 pollen grains/m3); 2 = MODERATE (20-49 pollen grains/m3); 3 = HIGH (50-99 pollen grains/m3); 4 = EXTREME (>100 pollen grains/m3).