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Direct effects of climate change on plants in Hungary

Direct effects of climate change on plants in Hungary. E szter Erdei , J. Bobvos**, T. Hardy*, E. Jozsa*, A. Paldy* * Natl. Institute of Environmental Health, Natl. Centre for Public Health, Budapest, Hungary **Metropolitan Institute of State Public Health Service, Budapest.

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Direct effects of climate change on plants in Hungary

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  1. Direct effects of climate change on plants in Hungary Eszter Erdei,J. Bobvos**, T. Hardy*, E. Jozsa*, A. Paldy* * Natl. Institute of Environmental Health, Natl. Centre for Public Health, Budapest, Hungary **Metropolitan Institute of State Public Health Service, Budapest

  2. Aim of the study To assess the impact of climate variability on the production of pollen grains and mould spores in Budapest, Hungary • To examine changes in aeroallergen abundance related to climatic conditions • To give descriptions of the characteristics of pollen and spore seasons during longer time period

  3. The yearly Taverage in the last 100 years of Hungary (°C)

  4. Methods • Pollen and spore database:32 different allergenic pollen grains and 2 mould spores and other spores are recorded continuously with standardized method (Burkard 7-day volumetric trap) on daily basis by Hungarian Aerobiological Network • 2 traps in Budapest (average pg/m3 was used), N=4018 observations! • Weather database: collected by online air pollution monitoring stations of the Metropolitan Institute of State Public Health Service, Budapest

  5. Consolidated daily aeroallergen counts into 3 groups: • spring trees (Alnus, Corylus, Betula, Fraxinus, Populus, Carpinus etc.) • grasses and summer-autumn weeds (Poaceae, Ambrosia, Artemisia, Chenopodiacea, ect.) • mold spores (Alternaria, Cladosporium, other spores, sum) • Meteorological factors: • temperature (daily min, max, range, 24-hour average) • humidity (RH %) • sunshine intensity (kW/hour) • barometric pressure (hPa) • windspeed (km/hour)

  6. Agrometeorological parameter: total heatsums („growing degree days”) were used including negative T values calculated from 1st January of every study year till the date of the 1% of the total yearly catch of the certain allergen species; -relative percentages of the yearly sums (separately for the studied years) were compared to the starting dates of the pollen seasons (retrospective method, 1% of the total yearly catch) for 8 allergenic pollen produced plant species and the total mould spores

  7. Variations of aeroallergen concentrations in Budapest 1992-2002

  8. Linear trends of aeroallergen concentrations during the 11-years-long study period

  9. Average pollen concentrations by years and trends in Budapest • Spring blooming trees • (birch, ash) Grasses and ragweed

  10. Variability of T24 and starting dates of birch pollen seasons

  11. Variability of Tmin and starting dates of ragweed pollen seasons

  12. Percentages of total heatsum values (±SD) at the starting dates of pollination seasons of 8 allergenic plant species and mould

  13. Variabilities of heatsum values related to birch pollinationperiod’s starting dates in Budapest

  14. Variabilities of heatsum values related to ragweed pollination period’s starting dates

  15. Morbidity data of rhinitis allergica patients in Hungary

  16. Number of hospitalized asthmatic patients in Hungary

  17. Conclusions • Increased production of aeroallergens during study period in Budapest - direct health impact of climate variability. • Starts of pollen seasons varied remarkably; associations with T24 andTmin. • The abundance of the most allergenic pollen types is enhanced moderately during the study period. • Prediction can be made using relative heatsum values for starting dates of pollen seasons and fungi spore production.

  18. Acknowledgement Special thank goes to: • Tamás Bodorics for agrometeorological advices • This work was supported by the Hungarian National Environmental Health Action Programme (NEHAP)

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