Data sets used in the analysis presented in the manuscript “A Measurement-Model Fusion Approach for Improved Wet Deposition Maps and Trends”. The datasets used for the analysis presented in this manuscript were provided by: 1. the National Atmospheric Deposition Program National Trends Network (NADP Program Office, Wisconsin State Laboratory of Hygiene, 465 Henry Mall, Madison, WI 53706. http://nadp.slh.wisc.edu/data/NTN/ntnAllsites.aspx ) 2. the Parameter-elevation Regressions on Independent Slopes Model (PRISM) Climate Group (PRISM Climate Group, Oregon State University, http://prism.oregonstate.edu, created 10 Sept 2015) 3. the Community Multiscale Air Quality (CMAQ) model development team within the EPA's Office of Research and Development

Each file is in comma-separated value (csv) format. Column names and definitions for each file are provided in the accompanying data dictionary file.

The three data files are: 1. NADP-NTN_and_CMAQv5.0.2_annual_total_wet_depostion_2002-2012.csv: Matched model and observational wet deposition data for 2002 -2012 over the continental US 2. CMAQv5.0.2_surface_layer_annual_total_wet_depostion_2002-2012.csv: Gridded surface layer model wet deposition data for 2002-2012 over the continental US 3. north.amer.map.CMAQ.km.csv: North America map lines in Lambert conformal projected coordinates based on projection used in CMAQ simulations.

This dataset is associated with the following publication: Zhang, Y., K. Foley, D. Schwede, J. Bash, J. Pinto, and R. Dennis. A Measurement‐Model Fusion Approach for Improved Wet Deposition Maps and Trends. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES. American Geophysical Union, Washington, DC, USA, 124(7): 4237-4251, (2019).