1. International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL
2. Soil Plant Nutrient Research Unit, USDA‐ARS, Ft Collins, CO
3. Environmental Science Division, Oak Ridge National Laboratory, Oak Ridge, TN
4. NOAA Earth System Research Laboratory, Boulder, CO
5. Department of Earth and Planetary Science, Harvard University, Cambridge, MA
6. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA
7. USDA–ARS National Soil Dynamics Laboratory, Auburn, AL