Fluctuations in grass-pollen counts in relation to nightly inversion and air pollution potential of the atmosphere |
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Authors: | Frits Th. M. Spieksma |
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Affiliation: | 1. Dept. of Allergology, Univ. Hospital Leiden, The Netherlands
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Abstract: | The idea has been generally accepted that accumulative properties of the lower atmosphere during stable non-turbulent air conditions by night (inversion) would lead to relatively high concentrations of airborne particles including those of biological origin like pollen grains originating from wind pollinating plants. Using temperature gradient, air pollution potential, and urban grass-pollen counts as criteria in a meteorologically homogenous region in the western part of the Netherlands, this relation between inversion and airborne grass-pollen concentration appears to be very weak and of no significance for the causation of nightly peaks in the grass-pollen counts. |
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