Mathematics – Logic
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.a41d..03g&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #A41D-03
Mathematics
Logic
0300 Atmospheric Composition And Structure, 0315 Biosphere/Atmosphere Interactions (0426, 1610), 0322 Constituent Sources And Sinks, 0345 Pollution: Urban And Regional (0305, 0478, 4251)
Scientific paper
We present trace gas, particle and meteorological measurements from southern Nova Scotia during the summer of 2004, and use them to quantify the impact of U.S. pollution outflow and other sources on atmospheric composition at the site. In addition, we explore trends in regional trace gas concentrations over the past decade using historical data from Chebogue Point and Sable Island. The different sources controlling the composition of air arriving at Chebogue Point are identified and characterized using a factor analysis approach. The most important of these were U.S. outflow, local combustion, and biogenic emissions. Average levels of carbon monoxide and ozone in air coming from the eastern seaboard of the U.S. were 30 ppb and 20 ppb higher, respectively, than the average from other sectors. Total aerosol loading was higher by more than a factor of three during periods of U.S. outflow. Organic matter made up the highest proportion of the total aerosol mass during periods of primary and secondary biogenic influence, suggesting the importance of biogenic secondary organic aerosol.
Allan D. J.
Cross E.
Goldstein Allen H.
Holzinger Rupert
Jimenez J. J.
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