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Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica

Throughout the year 2001, aerosol samples were collected continuously for 10 to 15 days at the French Antarctic Station Dumont d'Urville (DDU) (66°40' S, l40°0' E, 40 m above mean sea level). The…
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Triple oxygen isotope analysis of nitrate using the denitrifier method and thermal decomposition of N2O.

An online method for analysis of the 17O anomaly, using a strain of denitrifiers to convert nitrate to N2O, which decomposes quantitatively to N 2 and O2 in a gold furnace at 800 degrees C, followed by gas chromatographic separation and isotope analysis of O2.
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Complete and accurate mass spectrometric isotope analysis of tropospheric nitrous oxide

[1] We describe a manual extraction and purification method for mass spectrometric isotope analyses of tropospheric N2O. A theoretical framework to correct for (hydro)fluorocarbon and CO2…
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Atmospheric composition change – global and regional air quality

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Subsurface tropical Pacific nitrogen isotopic composition of nitrate: Biogeochemical signals and their transport

We report measurements of the nitrogen isotopic composition of nitrate (the δ15N of NO3−) across the equatorial Pacific, for zonal transects from 165°E to 95°W and meridional transects across 95° and…
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Marine productivity estimates from continuous O2/Ar ratio measurements by membrane inlet mass spectrometry

Dissolved oxygen/argon (O2/Ar) ratios in the oceanic mixed layer are indicative of net community production (NCP) because O2 and Ar share similar physical solubility properties, but only O2 is…
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Reformulated 17O correction of mass spectrometric stable isotope measurements in carbon dioxide and a critical appraisal of historic ‘absolute’ carbon and oxygen isotope ratios

    J. Kaiser
    Chemistry, Environmental Science
  • 1 March 2008
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Continuous high-frequency dissolved O2/Ar measurements by equilibrator inlet mass spectrometry.

A new method for continuous shipboard measurements of O(2)/Ar by equilibrator inlet mass spectrometry (EIMS) is presented and, from these measurements and an appropriate gas exchange parametrization, NCP can be estimated at high spatial and temporal resolution.
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Technical note: Consistent calculation of aquatic gross production from oxygen triple isotope measurements

Abstract. Oxygen triple isotope measurements can be used to calculate aquatic gross oxygen production rates. Past studies have emphasised the appropriate definition of the 17O excess and often used…
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Wavelength dependence of isotope fractionation in N 2 O photolysis

Abstract. In previous reports on isotopic fractionation in the ultraviolet photolysis of nitrous oxide (N2O) only enrichments of heavy isotopes in the remaining N2O fraction have been found. However,…
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