1. Department of Plant & Soil Sciences, University of Delaware, Newark, Delaware 19716, United States
2. Department of Earth Sciences, Spatial Sciences Institute, University of Southern California, Los Angeles, California 90089, United States
3. Department of Chemistry and Biochemistry, Old Dominion University, 4501 Elkhorn Avenue, Norfolk, Virginia 23529, United States
4. Center for Environmental Measurement and Modeling, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, Durham, North Carolina 27711, United States
5. USDA-ARS: Sustainable Agriculture Systems Lab, Beltsville, Maryland 20705, United States
6. U.S. Army Cold Regions Research & Engineering Laboratory, Fort Wainwright, Fairbanks, Alaska 99703, United States
7. Hagler Institute Fellow, Texas A&M University, College Station, Texas 77840, United States