Table 2.

List of WRF-MEGAN-CMAQ simulations.

Case ID	Description	Purpose
BASE	Base case simulation
BCON	Use dynamic boundary conditions extracted from D1 of CMAQ pollen transport simulation	Case study with simulated pollen concentration influenced by outside domain
PAHI	Use the upper bound estimates of pollen emission pollen emission pool size εsp in Eq. (1). Compared with case BASE, +74% for birch and walnut, +113% for grass, +53% for walnuts, +43% for olive and +93% for oak	Sensitivity study of the uncertainties for pollen emission pool size εsp estimates to their simulated concentration
PALO	Use the lower bound estimates of εsp. Compared with case BASE, −74% for birch and walnut, −113% for grass,−53% for walnuts, −43% for olive and −93% for oak
UTHI	Set empirical threshold wind speed U10e in Eq. (4) as 4.0m/s compared with case BASE 2.9m/s	Sensitivity study of empirical threshold wind speed U10e setting to simulated pollen concentration
UTLO	Set empirical threshold wind speed U10e in Eq. (4) as 2.0m/s compared with case BASE 2.9m/s
DVHI	Increase the mean diameter of each pollen genera in Table 1 by 10% compared to case BASE	Sensitivity study of dry deposition velocity Vdp calculation for pollen genera to their simulated concentration
DVLO	Decrease the mean diameter of each pollen genera in Table 1 by 10% compared to case BASE