iUTAH precipitation ions and nitrogen stable isotope composition

Ion concentrations and precipitation amount were measured at 14 sites in the Salt Lake and Cache Valleys from December 2013 to February 2014. Sample collection was sporadic at several sites. The goal of this study was to identify land use impacts on nitrogen deposition to the iUTAH watersheds.A subset of samples was analyzed for 15N and 18O of NO3 and 15N of NH4.Methods and findings are described in the associated JGR-B manuscript