Pollen was emitted from 12 July until 21 July 2004. Daily mean
pollen concentrations, hci, averaged between 0600 EDT and
1800 EDT are shown in Fig. 4 at all measured heights. During
most nighttime periods no significant amounts of pollen were
sampled. Pollen concentrations increased steadily from 12
July, peaking on 16 July and decreasing afterwards. No pollen
was collected on the rods on 18 July, a rainy and cloudy day.
Mean pollen concentrations decreased with increasing height;
e.g. on 16 July, the pollen concentration at z/h = 1 equaled
189 grainsm3, and at z/h = 2 reduced to 58 grainsm3.
Pollen was emitted from 12 July until 21 July 2004. Daily mean
pollen concentrations, hci, averaged between 0600 EDT and
1800 EDT are shown in Fig. 4 at all measured heights. During
most nighttime periods no significant amounts of pollen were
sampled. Pollen concentrations increased steadily from 12
July, peaking on 16 July and decreasing afterwards. No pollen
was collected on the rods on 18 July, a rainy and cloudy day.
Mean pollen concentrations decreased with increasing height;
e.g. on 16 July, the pollen concentration at z/h = 1 equaled
189 grainsm3, and at z/h = 2 reduced to 58 grainsm3.
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