For 16 July, at the highest threshold value
juwj>0:45, Dpeak/Dtrough 2.4. Thus, Fig. 15 indicates that
relative to the neighboring pollen sampling periods,
‘‘extreme’’ ejections (high thresholds) occur increasingly less
as the threshold value is raised during periods of minimum
pollen concentration. Thus, ‘‘extreme’’ events may be instrumental
as an upward pollen transport mechanism as
indicated by DNS (Soldati, 2005). However, since the here
presented synchronicity between turbulence and pollen
concentration is based on measurements made during only
2 days, one should be careful with its interpretation.
For 16 July, at the highest threshold valuejuwj>0:45, Dpeak/Dtrough 2.4. Thus, Fig. 15 indicates thatrelative to the neighboring pollen sampling periods,‘‘extreme’’ ejections (high thresholds) occur increasingly lessas the threshold value is raised during periods of minimumpollen concentration. Thus, ‘‘extreme’’ events may be instrumentalas an upward pollen transport mechanism asindicated by DNS (Soldati, 2005). However, since the herepresented synchronicity between turbulence and pollenconcentration is based on measurements made during only2 days, one should be careful with its interpretation.
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