Scientific Investigations Report 2011–5262
Precipitation samples for measurement of stable-isotope ratios of hydrogen (δ2H) and oxygen (δ18O) were collected at the Norman Landfill Research Site in Norman, Oklahoma, from May 1996 to October 2008. Rainfall amounts also were measured at the site (U.S. Geological Survey gaging station 07229053) during the collection period. The δ2H of precipitation samples ranged from −121.9 to +8.3 per mil, and the δ18O of precipitation ranged from –16.96 to +0.50 per mil. The volume-weighted average values for δ2H and δ18O of precipitation over the 12-year measurement period were −31.13 per mil for δ2H and −5.57 per mil for δ18O. Average summer-season δ2H and δ18O values of precipitation usually were more positive (enriched in the heavier isotopes) than winter values.
First posted June 24, 2011
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Jaeschke, J.B., Scholl, M.A., Cozzarelli, I.M., Masoner, J.R., Christenson, Scott, and Qi, Haiping, 2011, Stable-isotope ratios of hydrogen and oxygen in precipitation at Norman, Oklahoma, 1996–2008: U.S. Geological Survey Scientific Investigations Report, 2011–5262, 22 p.
Precipitation Characteristics and Hydrogen and Oxygen Isotope Ratios in Precipitation at the Norman Landfill, 1996–2008
Appendix 1. Measurements of sample volume, ratios of hydrogen and oxygen isotopes (δ2H and δ18O)
Appendix 2. Annual volume-weighted average deuterium and oxygen-18 (δ2H and δ18O) values