Journal ArticleDOI
Standard for Reporting Concentrations of Deuterium and Oxygen-18 in Natural Waters.
TLDR
A standard, based on the set of ocean water samples used by Epstein and Mayeda to obtain a reference standard for oxygen-18 data, but defined relative to the National Bureau of Standards isotopic reference water sample, is proposed for reporting both deuterium and oxygen- 18 variations in natural watersrelative to the same water.Abstract:
A standard, based on the set of ocean water samples used by Epstein and Mayeda to obtain a reference standard for oxygen-18 data, but defined relative to the National Bureau of Standards isotopic reference water sample, is proposed for reporting both deuterium and oxygen-18 variations in natural waters relative to the same water. The range of absolute concentrations of both isotopes in meteoric-waters is discussed.read more
Citations
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Oxygen isotopes of marine diatoms and relations to opal-A maturation
TL;DR: In this paper, the authors compared oxygen isotopes of natural marine diatoms sampled from ocean surface water, sediment traps and surface sediments with oxygen isotopic fractionations determined for laboratory diatom cultures.
Journal ArticleDOI
Water subsidies from mountains to deserts: their role in sustaining groundwater-fed oases in a sandy landscape
Esteban G. Jobbágy,Esteban G. Jobbágy,Marcelo D. Nosetto,Marcelo D. Nosetto,Marcelo D. Nosetto,Pablo E. Villagra,Robert B. Jackson +6 more
TL;DR: This study highlights the reliance of ecosystem productivity in natural oases on Andean snowmelt, which is increasingly being diverted to one of the largest irrigated regions of the continent.
Journal ArticleDOI
Total CO2,13C, and dissolved oxygen -18O at Geosecs II in the North Atlantic
TL;DR: In contrast to the North Atlantic, there is a very large gradient of dissolved O2 in the vertical profile of North Pacific Deep Water; however, if themean deep-water O2 concentration is compared with the uniform value in North Atlantic Deep Water, the O2 and ΣCO2 differences in North Pacific and North Pacific deep water are essentially equimolar at 160 μm/kg.
Journal ArticleDOI
Partitioning evapotranspiration fluxes into soil evaporation and plant transpiration using water stable isotopes under controlled conditions.
Youri Rothfuss,Philippe Biron,Isabelle Braud,Laurent Canale,Jean-Louis Durand,Jean-Paul Gaudet,Patricia Richard,Michel Vauclin,Thierry Bariac +8 more
TL;DR: In this paper, the authors performed a partitioning of evapotranspiration under fully controlled conditions (climatic chamber) along growth of a tall fescue cover (Festuca arundinacea) into soil evaporation (Ev) and plant transpiration (Tr) by measuring their stable oxygen isotopic compositions (δET, δEv and δTr).
Journal ArticleDOI
Changes in oxygen 18 as a measure of long-term fluctuations in tropical lake levels and molluscan populations1
Alan Covich,Minze Stuiver +1 more
TL;DR: Deevey et al. as discussed by the authors proposed a new approach to determine lake level stability in tropical, closed lake basins where mean annual temperatures have remained relatively stable in comparison with changes in rates of inflow and evaporation.
References
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Journal ArticleDOI
Isotopic Variations in Meteoric Waters
TL;DR: The relationship between deuterium and oxygen-18 concentrations in natural meteoric waters from many parts of the world has been determined with a mass spectrometer and shows a linear correlation over the entire range for waters which have not undergone excessive evaporation.
Journal ArticleDOI
Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide
TL;DR: In this paper, Niee's and Solenhofen standards were compared to the Chicago PDB standard for carbon and oxygen isotope ratios, and the correction factors for instrumental effects and for the nature of the mass spectra were derived.
Journal ArticleDOI
Variation of O18 content of waters from natural sources
S Epstein,Toshiko K. Mayeda +1 more
TL;DR: A number of marine water and fresh water samples were examined for the relative O18O16 ratio, and the variation of this ratio was determined to a precision of ± 1% as mentioned in this paper.
Journal ArticleDOI
Effect of Low Concentrations of Carbon Dioxide on Photosynthesis Rates of Two Races of Oxyria.
TL;DR: Alpine plants of Oxyria digyna have higher apparent photosynthesis rates at various carbon dioxide concentrations than arctic, sea-level plants of the same species, which may be involved in the survival of plants at high elevations.