Recent advances in critical loads research and understanding vulnerability to N and S deposition across the contiguous U.S.
Chris Clark, Environmental Protection Agency Arlington, Arlington, VA, United States, Robert Daniel Sabo, U.S. Environmental Protection Agency, Office of Water, Washington, United States, Kevin J. Horn, Virginia Tech University, Blacksburg, United States, Quinn Thomas, Virginia Polytechnic Institute and State University, Forest Resources and Environmental Conservation, Blacksburg, VA, United States, Samuel Simkin, University of Colorado, Boulder, United States, Linda H Pardo, USDA Forest Service, Northern Research Station, Burlington, United States and Michael D Bell, National Park Service, Air Resources Division, Lakewood, United States
