Back
Relations between crown condition and ozone and its dependence on environmental factors.
Journal article

Relations between crown condition and ozone and its dependence on environmental factors.

  • Zierl B Swiss Federal Research Institute, WSL, Birmensdorf, Switzerland. zierl@fowi.ethz.ch
  • 2002-07-20
Published in:
  • Environmental pollution (Barking, Essex : 1987). - 2002
Environmental Exposure
Models, Theoretical
Oxidants, Photochemical
Ozone
Sunlight
Temperature
Trees
Water
English It is now widely accepted that stomatal ozone uptake provides a more reliable indicator for the assessment of risk of ozone damage to forest trees than ozone exposure. Thus, environmental factors influencing stomatal opening strongly affect the sensitivity of forest trees towards high ozone concentrations. In this study the hydrological model WAWAHAMO is used to simulate stomatal opening dependent on air temperature, solar radiation, vapor pressure deficit and soil water potential. Then, a statistical analysis was carried out to investigate relations between crown defoliation and ozone concentrations dependent on stomatal opening. The results support the hypothesis that tropospheric ozone contributes to the observed crown defoliation. However, environmental factors strongly affect tree response to high ozone concentrations.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/207789
Statistics
Document views: 23 File downloads: