Claire Welty, University of Maryland Baltimore County, Dept. of Chemical, Biochemical, and Environmental Engineering and Center for Urban Environmental Research and Education, Baltimore, MD, United States, Joel Moore, Towson University, Physics, Astronomy, & Geosciences, Towson, MD, United States, Jonathan M Duncan, Pennsylvania State University Main Campus, Ecosystem Science and Management, University Park, PA, United States, John Trusal Kemper, Colorado State University, Geosciences, Fort Collins, MD, United States and Peter M Groffman, CUNY Advanced Science Research Center; Brooklyn College, Department of Earth and Environmental Sciences, New York, NY, United States