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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Atmos Chem Phys. 2018 Jun 27;18(12):9091–9106. doi: 10.5194/acp-18-9091-2018

Figure 1.

Figure 1

Scatter plots for the annual accumulated WDEP (total oxidized nitrogen (TNO3), reduced nitrogen (NHX), and total sulfate (TSOX)) between observations and precipitation-adjusted model results from 1990 to 2010 for 170 valid sites with 3531 valid data points. Each NADP is assumed to be valid for our analysis only if at least 18 years of observation data are available at that site and the data coverage is at least 75% for each year. Each point in the plots represents the annual accumulated WDEP for a given site and year. Note that the annual accumulated WDEP values used in this analysis may not be the actual annual totals due to missing data in the observations.