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Desert Nitrate

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https://www.usgs.gov/staff-profiles/tyler-coplen
https://www.usgs.gov/staff-profiles/john-karl-bohlke
https://www.usgs.gov/staff-profiles/haiping-qi

Böhlke, J.K., Ericksen, G.E., and Revesz, K., 1997, Stable isotope evidence for an atmospheric origin of desert nitrate deposits in northern Chile and southern California, USA: Chemical Geology (Isotope Geoscience Section), v. 136, p. 135-152.
Densmore, J.N., and Böhlke, J.K., 2000, Use of nitrogen isotopes to determine sources of nitrate contamination in two desert basins in California, in Reichard, E.G, Hauchman, F. S., and Sancha, A.M., eds., Interdisciplinary Perspectives on Drinking Water Risk Assessment and Management: International Association of Hydrologic Sciences Publication 260, p. 63-73. (on-line abstract)
Groffman, P.M., Altabet, M.A., Böhlke, J.K., Butterbach-Bahl, K., David, M.B., Giblin, A.E., Kana, T.M., Nielsen, L.P., Firestone, M.K., and Voytek, M.A., in press, Methods for measuring denitrification: Diverse approaches to a difficult problem: Ecological Applications.
McMahon, P.B., and Böhlke, J.K., in press, Regional patterns in the isotopic composition of natural and anthropogenic nitrate in groundwater, High Plains, USA: Environmental Science and Technology.
McMahon, P.B., Dennehy, K.F., Bruce, B.W., Böhlke, J.K, Michel, R.L., Gurdak, J.J., and Hurlbut, D.B., 2006, Storage and transit time of chemicals in thick unsaturated zones under rangeland and irrigated cropland, High Plains, USA: Water Resources Research, v. 42 (W03413, doi:10.1029/2005WR004417), p. 1-18.
Michalski, G., Böhlke, J. K., and Thiemens, M. H., 2004, Long-term atmospheric deposition as the source of nitrate and other salts in the Atacama Desert, Chile: new evidence from mass-independent oxygen isotopic compositions: Geochimica et Cosmochimica Acta, vol. 68, p. 4023-4038.
Michalski, G., Savarino, J., Böhlke, J. K., and Thiemens, M. H., 2002, Determination of the total oxygen isotopic composition of nitrate and the calibration of a δ17O nitrate reference material: Analytical Chemistry, v. 74, p. 4989-4993.
Seitzinger, S.P., Harrison, J., Böhlke, J. K., Bouwman, A.F., Lowrance, R.R., Peterson, B.J., Tobias, C.R., and van Drecht, G., in press, Denitrification across landscapes and waterscapes: a synthesis: Ecological Applications.
Smith, L.K., Voytek, M.A., Böhlke, J.K., and Harvey, J.W., in press, Denitrification rates in nitrate-contaminated streams: application of membrane inlet mass spectrometry and isotope tracer methods in flow-through chambers with intact cores: Ecological Applications.