title: Assessment of ozone visible symptoms in the field: perspectives of quality control.
abstract: The second UN/ECE ICP-Forests Intercalibration Course on the Assessment of Ozone Injury on European Tree Species was carried out in August 2001 at Lattecaldo (Canton Ticino, CH) and Moggio (Lombardy, I). Forty-eight experts from several European countries participated in the exercises and assessed visible symptoms of ozone injury both in open-top chambers (OTC) (Lattecaldo) and under open field (Moggio) conditions. Evaluation of the results indicated a large variability among the teams and call for adequate training of the observers prior to symptom assessment for quality assurance purposes. Highest variability was found for the species developing unclear symptoms which could be confused with senescence processes; such species should not be used in the field. The authors provide suggestions to improve the reliability of the ozone injury assessment on forest plant species.
authors.affiliation: University of Florence, Piazzale delle Cascine 28, 50144, Florence, Italy. filippo.bussotti@unifi.it
authors.forename: F
authors.initials: F
authors.lastname: Bussotti
authors.forename: M
authors.initials: M
authors.lastname: Schaub
authors.forename: A
authors.initials: A
authors.lastname: Cozzi
authors.forename: N
authors.initials: N
authors.lastname: Kräuchi
authors.forename: M
authors.initials: M
authors.lastname: Ferretti
authors.forename: K
authors.initials: K
authors.lastname: Novak
authors.forename: J M
authors.initials: JM
authors.lastname: Skelly
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods / Q000592:standards*; D005060:Europe; D010126:Ozone / Q000032:analysis*; D011786:Quality Control; D014197:Trees
chemical_list: D000393:Air Pollutants; D010126:Ozone