Surface-based measurements from the EMEP and Airbase networks are used to estimate the changes in surface ozone levels during the 1995–2014 period over Europe. We find significant ozone enhancements (0.20–0.59?μg?msup?3/sup?yrsup?1/sup for the annual means; P-value F-test) over the European suburban and urban stations during 1995–2012 based on the Airbase sites. For European background ozone observed at EMEP sites, it is shown that a significantly decreasing trend in the 95th percentile ozone concentrations has occurred, especially at noon (0.9?μg?msup?3/sup?yrsup?1/sup; P-value ?3/sup?yrsup?1/sup (P-value
展开▼
