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Tropospheric Ozone Assessment Report: Present-day Tropospheric Ozone Distribution and Trends Relevant to Vegetation
The Tropospheric Ozone Assessment Report (TOAR-Vegetation) analyzed ozone metrics across over 3,300 vegetated sites globally, focusing on M12, AOT40, and W126. Findings indicate that the highest ozone values (2010–14) are concentrated in the mid-latitudes of the northern hemisphere, while the lowest are found in parts of Australia, New Zealand, South America, Europe, Canada, and the USA. Between 1995 and 2014, ozone trends showed a significant decrease in North America, no change in Europe, and a significant increase in East Asia. The report recommends expanding ozone monitoring, investigating peri-urban and mountain agriculture, and establishing region-specific damage thresholds.
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Document type: Report