Table 1 Measures of pollen and spore activity, and their description.
From: Increased duration of pollen and mold exposure are linked to climate change
Measure | Description | Unit |
|---|---|---|
Pollen or Spore Concentration | Number of pollen or spore grains per unit volume of air collected over a period of 24 h | Pollen grains/m3 |
Weekly Average Concentration (WAC) | Pollen or Spore Concentration averaged by calendar week | Pollen grains/m3 |
Annual Average Concentration (AAC) | Pollen or Spore Concentration averaged by calendar year | Pollen grains/m3 |
Start of Season | Week of the year (1–52) | |
End of Season | Week of the year (1–52) | |
Season Length | Number of weeks between the end of season and the start of the season | Number of Weeks |
Maximum Pollen or Spore Concentration (MPC) | Maximum value of WPCs over the whole year | Pollen grains/m3 |
Peak Week | Week when the WPC reaches its maximum value in a year | Week of the year (1–52) |
Number of Active Weeks (NAW) | Number of weeks where concentration is greater than zero | Number of Weeks |
Seasonal Pollen or Spore Integral (SPIn) | Sum of WACs over the season length | Week * Pollen grains/m3 |
Annual Pollen or Spore Integral (APIn) | Sum of WACs over the whole year | Week * Pollen grains/m3 |
