Abstract
Under certain, favourable conditions, a considerable amount of long-distance transported biological material can be deposited far from its place of origin. In Fennoscandia such situations occur when there is a strong southerly air circulation from the Mediterranean and/or North-Africa. Soil particles and pollen grains associated with the top soil or the present vegetation, can be lifted up by strong surface winds and brought up to higher levels, where further transportation takes place. During the last few years several of these events have been reported.
The pollen analysis of coloured and uncoloured precipitation provides information about exotic pollen rain and its extent. By combining three-dimensional trajectory calculations with the actual phenological data the place of origin for the analysed material can be determined. In most cases the origin of the material has been determined to be the northern part of Sahara.
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Hjelmroos, M. (1996). Long-Range Transport of Biological Particles of Desert Origin: A Short Review. In: Guerzoni, S., Chester, R. (eds) The Impact of Desert Dust Across the Mediterranean. Environmental Science and Technology Library, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-3354-0_25
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DOI: https://doi.org/10.1007/978-94-017-3354-0_25
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