Air Quality Model Regional Ozone Street Canyon Indicator Data Scenario Comparaison

Regional Ozone - Geneva

Initial reference scenario

 

 

Figure A.31. Number of days with 8hour running average ozone concentration exceeding 120µg/m3 (IND120), calculated by the OFIS model, for a 150x150km2 area surrounding Geneva, and wind rose of prevailing wind during the summer semester of 1995 (final reference scenario).

 

In the case of Geneva, the combination of low wind speeds and high emissions resulted in high ozone exceedances (170 days for IND120). This is attributed also to the sensitivity of ozone formation in correlation to VOC and NOx emissions, as discussed in detail for Switzerland in Andreani-Aksoyoglou et. al., 2001. Last but not least, it should be noted that high ozone concentration have already been reported for Geneva in literature, without sufficient explanation on the cause-effect chain. (Neininger, 1997).

 

 

AOT(max),

AOT(ave),

AOT(sub),

AOT(town)

AOT60

44.72

31.81

37.81

40.31

 

IND120(domain)

IND120(sub)

IND120(town)

 

DAYS

173

169

167

 

 

Final reference scenario

 

No updates were made available

 

City related scenarios

 

No data were made available. Calculations were performed by the University of Geneva, and the corresponding results are made available under http://ecolu-info.unige.ch/recherche/sutra/Results/