Copenhagen--a significant source of birch (Betula) pollen?
Current aerobiological research applies the hypothesis that the main source of atmospheric birch (Betula) pollen is forest trees. Our results indicate that the measured levels in Copenhagen are not only due to birch trees in Danish forests but that the urban areas also seem to be a significant source of birch pollen. A number of episodes in 2003 with enhanced pollen levels in Copenhagen seem to be associated with parks and gardens inside and just outside the city. Our results also indicate one long-range transport episode from remote sources in Poland and Germany. Finally, our results show that the pollen levels vary considerably over the day and geographically between Copenhagen and the city of Roskilde, 40 km away. We suggest, that these differences in time and space in the pollen levels are mapped using an integrated monitoring strategy.
Skjøth
Carsten Ambelas
CA
National Environmental Research Institute, University of Aarhus, Frederiksborgvej 399, Roskilde, Denmark. cas@dmu.dk
Sommer
Janne
J
Brandt
Jørgen
J
Hvidberg
Martin
M
Geels
Camilla
C
Hansen
Kaj Mantzius
KM
Hertel
Ole
O
Frohn
Lise M
LM
Christensen
Jesper H
JH
D001272:Atmosphere; D029662:Betula; D002940:Circadian Rhythm; D003718:Denmark; D008954:Models, Biological; D011058:Pollen; D012621:Seasons; D014887:Weather