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Full-Text Articles in Social and Behavioral Sciences
Vertical Profiles Of Nitrous Oxide Isotopomer Fractionation Measured In The Stratosphere, D W. T Griffith, Geoffrey Toon, Bhaswar Sen, Jean-Francois Blavier, Robert A. Toth
Vertical Profiles Of Nitrous Oxide Isotopomer Fractionation Measured In The Stratosphere, D W. T Griffith, Geoffrey Toon, Bhaswar Sen, Jean-Francois Blavier, Robert A. Toth
Faculty of Science, Medicine and Health - Papers: part A
We have measured the vertical profiles of several isotopomers of nitrous oxide, N2O, in the stratosphere by balloon-borne infrared remote sensing between 15 and 35 km. In particular we distinguish the individual profiles and relative enrichments of the positional isotopomers 15N14N16O and 14N15N16O for the first time. We find a distinct and reproducible relative enrichment of the isotopomers which is in general agreement with measured photolysis rates in the laboratory and theoretical predictions. The results confirm photolysis as the dominant stratospheric loss process for N2O and …
Positionally Dependent 15n Fractionation Factors In The Uv Photolysis Of N2o Determined By High Resolution Ftir Spectroscopy, Fred Turatti, D W. T Griffith, Stephen Wilson, Michael Esler, T Rahn, H Zang, G A. Blake
Positionally Dependent 15n Fractionation Factors In The Uv Photolysis Of N2o Determined By High Resolution Ftir Spectroscopy, Fred Turatti, D W. T Griffith, Stephen Wilson, Michael Esler, T Rahn, H Zang, G A. Blake
Faculty of Science, Medicine and Health - Papers: part A
Positionally dependent fractionation factors for the photolysis of isotopomers of N2O in natural abundance have been determined by high resolution FTIR spectroscopy at three photolysis wavelengths. Fractionation factors show clear 15N position and photolysis wavelength dependence and are in qualitative agreement with theoretical models but are twice as large. The fractionation factors increase with photolysis wavelength from 193 to 211 nm, with the fractionation factors at 207.6 nm for 14N15N16O, 15N14N16O and 14N14N18O equal to −66.5±5‰,−27.1±6‰ and −49±10‰, respectively.