. Author manuscript; available in PMC: 2012 Apr 1.

Published in final edited form as: Atmos Environ (1994). 2011 Apr 1;45(13):2260–2276. doi: 10.1016/j.atmosenv.2010.12.008

Table 2.

Typical birch and ragweed specific parameters used in the simulations.

Species-characteristic attributes	Birch	Ragweed

Species spatial coverage	3.6%	uniform (2%)
Particle aerodynamic diameter (µm)	20	20
Particle density (kg/m³)	800	1,200
Particle shape	spherical	spherical
Particle terminal velocity (m/s)	0.70	1.1
Plant average release height (m)	15	1.0
Release season	Spring	Autumn
Release window (days)	30	30
Heat degree day threshold	2,200	2,800
Pollen production P_q (particles/m²)	10⁹	10⁹
Contained allergens	Bet v1	Amb α V³, Amb V,
	Bet v2	Amb t V, Amb p V