Methodology for direct field measurements of ozone flux to foliage with shoot chambers

摘要

Values of ozone (O_3) flux measured on the shoot scale by enclosure techniques can provide detailed information about the partition and seasonality of the removal pathways on the foliage. However, O_3 reactivity makes such measurements potentially inaccurate, particularly in field conditions where ambient concentration is low. Special consideration should be given to the losses on the chamber wall material, which can rival in magnitude and dynamics the measure of shoot removal. We propose a way of taking into account this dynamic behaviour in the context of field monitoring with simple chambers based on dynamic principles.