Aerobiologia

, 5:123 | Cite as

Vertical variation in pollen abundance in North-Central London

  • Richard Hugh Bryant
  • Jean Carol Emberlin
  • Jane Norris-Hill
Article

Summary

Pollen data from three samplers located at heights of 0.5m, 10m and 55 m were used to investigate vertical differences in pollen abundance in North-Central London. Weekly accumulative counts for all pollen types were collected from February to September 1988. Distinct variations in abundance between the sites were recorded for some pollen taxa. For example,Gramineae recorded greater abundance at the higher sampling position. Other pollen types, includingPlatanus, were recorded at consistently greater abundance at the 10 m height compared to the 55 m level. Significant differences between the pollen counts at these two heights are discussed in relation to pollen source area, the specific gravity of the pollen grain, airflow patterns of the urban area and the weather conditions affecting pollen dispersal. Tracer experiments using Lycopodium spores were employed to investigate dispersal patterns to all three sampling heights. The results from these trials are used to assist in the interpretation of data from the depositional samplers. The study reported in this paper forms part of a wider survey of 14 sampling sites examining spatial variations in pollen abundance.

Key words

pollen counts tracers vertical variations 

References

  1. Burton R.M., (1983) —Flora of The London Area. London Natural History Society, London, pp. 225.Google Scholar
  2. Davies R.R., (1965) —Pollen and fungal spores in the city atmosphere. Acta Allergol.20:508.Google Scholar
  3. Emberlin J.C., Norris-Hill J., Bryant R.H., (1990) —A calendar for tree pollen London. Grana (in press).Google Scholar
  4. Gregory P.H., (1978) —Distribution of airborne pollen and spores and their long distance transport. Pageoph. Vol.116:309–315.CrossRefGoogle Scholar
  5. Hyde H.A., (1952) —Studies in atmospheric pollen. V. A daily census of pollen at Cardiff for the six years 1943–48. New Phytologist,51:281.CrossRefGoogle Scholar
  6. McDonald J.E., (1962) —Coffection and washout of airborne pollen by raindrops. Science, Vol.135:435–437.Google Scholar
  7. Mandrioli P., Negrini M.G., Cesari G., Morgan G., (1984) —Evidence for long range transport of biological and anthropogenic aerosol particles in the atmosphere. Grana,23:43–53.CrossRefGoogle Scholar
  8. Nilsson S., (1973) —Scandinavian Aerobiology. Statens Naturvetenskapliga Forskningsrad (NFR).Google Scholar
  9. Lyon F.L., Kramer C.L., Eversmeyer M.G., (1984) —Vertical variation of airspora concentrations in the atmosphere. Grana,23:123–125.Google Scholar
  10. Raynor G.S., Cohen L.A., Hayes J.V., Ogden E.C., (1966) —Dyed pollen grains and spores as tracers in dispersion and deposition studies. Jnl. Appl. Met.5:728–729.CrossRefGoogle Scholar
  11. Raynor G.S., Hayes J.V., Ogden E.C. (1974) —Particulate dispersion into and within a forest. Boundary-Layer Meteorology,7:429–456.CrossRefGoogle Scholar
  12. Raynor G.S., Hayes J.V., Ogden E.C. (1975) —Particulate dispersion from sources within a forest. Boundary-Layer Meteorology,9:257–277.CrossRefGoogle Scholar
  13. Raynor G.S., Ogden E.C., Hayes J.V., (1970) —Dispersion and deposition of ragweed pollen from experimental sources. Jnl. Appl. Met.9:885–895.CrossRefGoogle Scholar
  14. Raynor G.S., Odgen E.C., Hayes J.V., (1973) —Variation in ragweed pollen concentration to a height of 108 m. Jnl. Allergy Clin. Immunol.51(4):199–207.CrossRefGoogle Scholar
  15. SPSS/PC+V2.0Base Manual (1988)Google Scholar
  16. Waldbott B., (1973) —The Health Effects of Environmental Pollutants. C.V. Mosby Co., U.S.A.Google Scholar

Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Richard Hugh Bryant
    • 1
  • Jean Carol Emberlin
    • 1
  • Jane Norris-Hill
    • 1
  1. 1.Pollen Research Unit, Department of GeographyThe Polytechnic of North LondonLondonUK

Personalised recommendations