Identification of <sup>18</sup>O‐isotopic lines of ozone in infrared ground‐based solar absorption spectra

Rinsland, C. P.; Devi, V. Malathy; Flaud, J.-M.; Camy‐Peyret, C.; Smith, M. A. H.; Stokes, G. M.

doi:10.1029/jd090id06p10719

Cited by 59 publications

(16 citation statements)

References 21 publications

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“…Since the discovery over 30 years ago, these findings have been confirmed by further mass spectrometer measurements of atmospheric samples (Krankowsky et al, 2007), and by high-resolution spectroscopy using surface-based total-column measurements (Rinsland et al, 1985;Meier and Notholt, 1996), balloon-borne instruments (Abbas et al, 1987;Goldman et al, 1989;Johnson et al, 2000;Haverd et al, 2005), and space-based spectrometers (Irion et al, 1996;Piccolo et al, 2009;Sato et al, 2014). Laboratory research indicated that the observed isotopic enrichment is primarily controlled by unusually strong isotope effects associated with the O 3 formation reaction (Morton et al, 1990):…”

Section: Introductionmentioning

confidence: 63%

Retrievals of heavy ozone with MIPAS

et al. 2016

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Abstract. A method for retrieval of 18 O-substituted isotopomers of O 3 in the stratosphere with the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) is presented. Using a smoothing regularisation constraint, volume mixing ratio profiles are retrieved for the main isotopologue and the symmetric and asymmetric isotopomers of singly substituted O 3 . For the retrieval of the heavy isotopologues, two microwindows in the MIPAS A band (685-970 cm −1 ) and six in the AB band (1020-1170 cm −1 ) are used. As the retrievals are performed as perturbations on the previously retrieved a priori profiles, the vertical resolution of the individual isotopomer profiles is very similar, which is important when calculating the ratio between two isotopomers. The performance of the method is evaluated using 1044 vertical profiles recorded with MIPAS on 1 July 2003.The mean values are separated by latitude bands, along with estimates of their uncertainties. The asymmetric isotopomer shows a mean enrichment of ∼ 8 %, with a vertical profile that increases up to 33 km and decreases at higher altitudes. This decrease with altitude is a robust result that does not depend on retrieval settings, and it has not been reported clearly in previously published datasets. The symmetric isotopomer is considerably less enriched, with mean values around 3 % and with a large spread. In individual retrievals the uncertainty of the enrichment is dominated by the measurement noise (2-4 %), which can be reduced by averaging multiple retrievals; systematic uncertainties linked to the retrieval are generally small at ∼ 0.5 %, but this is likely underestimated because the uncertainties in key spectroscopic parameters are unknown. The variabilities in the retrieval results are largest for the Southern Hemisphere.

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Section: Introductionmentioning

confidence: 63%

Retrievals of heavy ozone with MIPAS

et al. 2016

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“…The first experimental evidence that the heavy isotope of ozone at mass 50 is enriched above statistically expected values was presented by Mauersberger [1981] from an analysis of in situ mass spectrometer measurements. Additional measurements using both optical instrumentation and mass spectrometers have verified the large enrichment of 5øO 3 which varies in magnitude from 10 to 45% [Rinsland et al, 1985;Abbas et al, 1987;Goldman et al, 1989].…”

Section: Introductionmentioning

confidence: 99%

Measurement of isotopic abundances in collected stratospheric ozone samples

Schueler¹,

Morton²,

Mauersberger³

1990

Geophysical Research Letters

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Enrichment of heavy O3 isotopes has been measured in collected stratospheric samples. A balloon‐borne cryogenic sampler was used to gather six O3 samples between 26 and 35 km in three flights. Subsequent laboratory mass spectrometer analysis of rare O3 isotopes at both mass 49 and 50 has resulted in more precise measurements than have previously been reported with in situ and ground‐based techniques. In one flight, 50O3 was enriched by 12–16% and 49O3 by 9–11%, both increasing with altitude. In the remaining two flights, the isotope enrichment was nearly mass‐independent at 8–9%. The enrichments in O3 at mass 50 are less than the large 40% value observed in some stratospheric measurements but similar to 49O3 and 50O3 fractionations produced in laboratory‐generated ozone.

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“…Subsequent high-resolution laboratory studies in the far-infrared and middle infrared regions have produced major improvements in the line parameters for the pure rotation and the most important infrared bands of normal ozone and its 1SO-substituted isotopic varieties. These parameters have been used to identify and quantify 160180160 and 16016OJ80 features in ground-based infrared solar absorption spectra [Rinsland et al, 1985] [Kaye and Strobel, 1983;Kaye, 1986] predict negligibly small isotopic enhancement, it appears that the processes involved are not fully understood [Bates, 1988]. Some of these studies indicate that the enhancement should be in the 1601601•O.…”

Section: Introductionmentioning

confidence: 99%

Isotopic abundances of stratopheric ozone from balloon‐borne high‐resolution infrared solar spectra

Goldman¹,

Murcray²,

Murcray³

et al. 1989

J. Geophys. Res.

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Infrared solar absorption spectra recorded at 0.002–0.003 cm−1 resolution in the 10 μm region during two recent balloon flights from near 32°N latitude have been analyzed to determine the isotopic ratios of 16O16O18O and 16O18O16O, the two most abundant forms of isotopically substituted ozone, relative to normal ozone, in the stratosphere. The analysis has used recent improvements in the line parameters for 16O3, 16O16O18O, and 16O18O16O. Normalized to the standard isotopic ratios in ozone, the results show column‐averaged isotopic enhancement ratios of 1.20±0.14 and 1.40±0.18 for 16O18O16O/16O16O16O and 16O16O18O/16O16O16O, respectively, above 37 km altitude for flight measurements on November 18, 1987, and corresponding values of 1.16±0.08 and 1.25±0.12 for flight measurements on June 6, 1988. These measurements are the first such results obtained at high altitude using infrared techniques. The values are compared with heavy‐to‐normal O3 ratios reported previously from other techniques.

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Identification of ¹⁸O‐isotopic lines of ozone in infrared ground‐based solar absorption spectra

Cited by 59 publications

References 21 publications

Retrievals of heavy ozone with MIPAS

Retrievals of heavy ozone with MIPAS

Measurement of isotopic abundances in collected stratospheric ozone samples

Isotopic abundances of stratopheric ozone from balloon‐borne high‐resolution infrared solar spectra

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Identification of 18O‐isotopic lines of ozone in infrared ground‐based solar absorption spectra

Cited by 59 publications

References 21 publications

Retrievals of heavy ozone with MIPAS

Retrievals of heavy ozone with MIPAS

Measurement of isotopic abundances in collected stratospheric ozone samples

Isotopic abundances of stratopheric ozone from balloon‐borne high‐resolution infrared solar spectra

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Identification of ¹⁸O‐isotopic lines of ozone in infrared ground‐based solar absorption spectra