Increasing background ozone during spring on the west coast of North America

Details Increasing background ozone during spring on the west coast of North America Increasing background ozone during spring on the west coast of North America

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30l..15j&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 12, pp. 15-1, CiteID 1613, DOI 10.1029/2003GL017024

Physics

39

Atmospheric Composition And Structure: Pollution-Urban And Regional (0305), Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Atmospheric Composition And Structure: Troposphere-Constituent Transport And Chemistry

Scientific paper

Using a 15-year record of O3 from Lassen Volcanic National Park, a rural elevated site in northern California, data from two aircraft campaigns conducted in 1984 and 2002 over the eastern North Pacific, and observations spanning 18 years from five U.S. west coast, marine boundary layer sites, we show that O3 in air arriving from the Eastern Pacific in spring has increased by approximately 10 ppbv, i.e. 30% from the mid 1980s to the present. This positive trend in O3 correlates with the increasing trend in global nitrogen oxide emissions, which is especially pronounced in Asia. As spring is the season of strongest transport of Asian emissions to the Pacific, we conclude that the emission trend is the most likely cause of the O3 trend.

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