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Contact: Dr. Robert G. Peel
Aarhus University

Diurnal Concentration of Grass Pollen

Caption: Diurnal concentration of grass pollen for periods one-three is shown. The graph shows peak-time distributions for (a) Period 1 (early season), (b) Period 2 (mid-season) and (c) Period 3 (late season). Please note the different scales: Period two has the highest concentrations of pollen. These ideal profiles are based on 37, 58 and 62 basic profiles, respectively.

Credit: Robert G. Peel

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