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Table 3

Definition of ozone metrics calculated in this paper. DOI: https://doi.org/10.1525/elementa.409.t3

MetricDescriptionUnitMain usage

 
AAVG Annual average of all hourly ozone values ppb Climate change 
AdAVG Annual average of all daytime (0800–1959) ozone values ppb Climate Change 
SAVG Average of all hourly ozone values in different seasons ppb Climate change 
SdAVG Average of all daytime (0800–1959) ozone values in different seasons ppb Climate change 
AmaxMDA8 Annual maximum daily 8-h average ozone value ppb Human heath 
A4MDA8 Annual 4th highest daily maximum 8-h ozone value ppb Human heath 
SOMO35 Annual sum of the positive differences between the daily maximum 8-h ozone value and 35 ppb ppb-day Human heath 
SSOMO35 Seasonal sum of the positive differences between the daily maximum 8-h ozone value and 35 ppb ppb-day Human heath 
NDGT90 Annual number of days of MDA8 > 90 ppb days Human heath 
NDGT70 Annual number of days of MDA8 > 70 ppb days Human heath 
AOT40 Sum of all hourly ozone values over 40 ppb for all daylight hours (0800–1959) over 3-months ppb-h Vegetation 
W126 Sigmoidally weighted sum of hourly ozone values over 3-months and daytime (0800–1959), calculated using the method proposed by Lefohn et al. (1988) ppb-h Vegetation 
MetricDescriptionUnitMain usage

 
AAVG Annual average of all hourly ozone values ppb Climate change 
AdAVG Annual average of all daytime (0800–1959) ozone values ppb Climate Change 
SAVG Average of all hourly ozone values in different seasons ppb Climate change 
SdAVG Average of all daytime (0800–1959) ozone values in different seasons ppb Climate change 
AmaxMDA8 Annual maximum daily 8-h average ozone value ppb Human heath 
A4MDA8 Annual 4th highest daily maximum 8-h ozone value ppb Human heath 
SOMO35 Annual sum of the positive differences between the daily maximum 8-h ozone value and 35 ppb ppb-day Human heath 
SSOMO35 Seasonal sum of the positive differences between the daily maximum 8-h ozone value and 35 ppb ppb-day Human heath 
NDGT90 Annual number of days of MDA8 > 90 ppb days Human heath 
NDGT70 Annual number of days of MDA8 > 70 ppb days Human heath 
AOT40 Sum of all hourly ozone values over 40 ppb for all daylight hours (0800–1959) over 3-months ppb-h Vegetation 
W126 Sigmoidally weighted sum of hourly ozone values over 3-months and daytime (0800–1959), calculated using the method proposed by Lefohn et al. (1988) ppb-h Vegetation 
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