Preprints
https://doi.org/10.5194/acpd-9-25127-2009
https://doi.org/10.5194/acpd-9-25127-2009
25 Nov 2009
 | 25 Nov 2009
Status: this preprint was under review for the journal ACP. A revision for further review has not been submitted.

Heavy ozone enrichments from MIPAS limb emission spectra

C. Piccolo, A. Dudhia, and V. H. Payne

Abstract. Vertical enrichment profiles of stratospheric heavy ozone (asymmetric and symmetric 50O3 isotopomers) have been derived from the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). As a continuously operating satellite instrument, MIPAS has an advantage over previous measurements in providing global coverage over an extended time period, allowing the variations in enrichment to be determined. However, since the spectral features of the isotopomers are comparable with the magnitude of the instrument noise, a sequential estimation retrieval scheme has been used to average the measurements zonally.

The magnitude of observed enrichments is ~10% in stratosphere, a value consistent with previous observations and lab measurements. The data indicate that asymmetric heavy ozone is significantly more enriched than the symmetric isotopomer and show latitudinal and vertical variations in both the asymmetric and symmetric 50O3 enrichments. Enrichments decrease with decreasing temperature, as previously noted, at midlatidudes and polar regions, while they increase with decreasing temperature in equatorial regions.

MIPAS measurements contain also information on the asymmetric and symmetric 49O3 isotopomers. The enrichments of 49O3, obtained with the same sequential estimator approach, are much larger than the enrichments of 50O3, in contraddictions with previous results which predict larger enrichments for heavier isotopomers.

C. Piccolo, A. Dudhia, and V. H. Payne
 
Status: closed (peer review stopped)
Status: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed (peer review stopped)
Status: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
C. Piccolo, A. Dudhia, and V. H. Payne
C. Piccolo, A. Dudhia, and V. H. Payne

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