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. Author manuscript; available in PMC: 2014 Aug 27.
Published in final edited form as: Environ Sci Technol. 2008 Sep 1;42(17):6519–6525. doi: 10.1021/es800511x

Figure 1.

Figure 1

MBO, black triangle, (43.98° N 121.69° W, 2.7 km a.s.l.) is located in Oregon’s Cascade Range. A Asia and Siberia source regions (boxes) with respect to MBO. Example trajectories 25–26 April 2004 (red, Asia) and 12–13 May 2006 (blue, Siberia). B Western Oregon (W. OR), Eastern Oregon/Washington (E. OR/WA), and Central California (CA) agriculture source regions (boxes). Example trajectories 4–5 April 2006 (yellow, Central California), 13–14 March 2005 (green, Eastern Oregon/Washington), and 28–29 April 2006 (black, Western Oregon). Also shown is the percent cropland on the county level (17) and national parks/forests in Western North America.