Analyzing drivers of variability in the Δ17O of nitrate in the northwestern United States

Sarah M Anderson1, Serena H Chung1, Jeffrey M Welker2, Benjamin Harlow3 and Raymond David Evans4, (1)Washington State University, Pullman, WA, United States, (2)University of Alaska Anchorage, Anchorage, AK, United States, (3)Washington State University, Stable Isotope Research Facility, Pullman, WA, United States, (4)Washington State University, School of Biological Sciences, Pullman, WA, United States