Estimates of ozone AOT40 from passive sampling in forest sites in South-Western Europe

Giacomo Alessandro Gerosa, Filippo Bussotti, Marco Ferretti, Duccio Rocchini

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

43 Citazioni (Scopus)

Abstract

Weekly-fortnightly ozone (O3) concentrations measured by passive sampling at 81 forest monitoring plots in France, Italy, Spain and Switzerland over the period 2000e2002 were used to estimate the cumulative exposure index AOT40. The estimation method is based on a deterministic model which describes the O3 daily profile as a function of relative altitude (the difference between the altitude of the site and the lowest altitude within a 5 km radius) and the time of the day. Estimated AOT40 values (AOT40e) were evaluated against co-located automatic measurement stations and with 14 independent automatic stations located throughout Italy whose weekly mean O3 values were used to simulate passive samplers. AOT40 can be predicted by modelling passive sampling data (R2: 0.90; P < 0.0001, SE of estimates: 3271 ppb h), although considerable deviations can occur for individual sites. Estimated AOT40 shows a distinct, significant latitudinal and altitudinal gradient. Taking the 3-year average as a whole, exceedance of critical level of 5000 ppb h occurs at 77e100% of the monitored sites, respectively.
Lingua originaleEnglish
pagine (da-a)629-635
Numero di pagine7
RivistaEnvironmental Pollution
Volume145
DOI
Stato di pubblicazionePubblicato - 2007

Keywords

  • AOT40
  • Campionatori passivi
  • foreste
  • ozono

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