Science Source
Lin, Meiyun, Horowitz, Larry W., Payton, Richard, Fiore, Arlene M., Tonnesen, Gail
Atmospheric Chemistry and Physics
Published date March 1, 2017
Atmospheric Chemistry and Physics
Published date March 1, 2017
US surface ozone trends and extremes from 1980 to 2014: quantifying the roles of rising Asian emissions, domestic controls, wildfires, and climate
- States that US surface O3 responds to varying global-to-regional precursor emissions, climate, and extreme weather
- Examines these conjoined processes with observations and global chemistry-climate model (GFDL-AM3) hindcasts over 1980–2014
- Finds that Asian NOx emissions have tripled since 1990, contributing as much as 65% to modeled springtime background O3 increases (0.3–0.5ppbyr−1) over the WUS, outpacing O3 decreases attained via 50% US NOx emission controls
- Finds that without emission controls, the 95th percentile summertime O3 in the EUS would have increased by 0.2–0.4ppbyr−1 over 1988–2014 due to more frequent hot extremes and rising biogenic isoprene emissions
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