Urban Surface Ozone Level Trends in China (IMAGE)

University of Colorado at Boulder

Urban Surface Ozone Level Trends in China

Caption

Urban surface ozone level trends in China (red), Japan (purple), Europe (orange), and the United States (blue) from 1980?2017 for one ozone metric. For Japan, the EU, and the United States, only urban sites with records for more than 25 years (1980?2014) are included. For China, sites in 74 major cities with continuous observations from 2013?2017 are included. The inset shows ozone trends in Beijing (red) and Los Angeles (blue). Note that ozone in Beijing today is comparable to Los Angeles in 1990s.

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ES&T Letters/CIRES

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