Measurement of the isotopic ratio distribution of HD(16)O and H(2)(16)O in the 20-38 km altitude range from far-infrared spectra

Dinelli, Bianca Maria, Lepri, Gianmarco, Carlotti, Massimo, Carli, Bruno, Mencaraglia, Francesco, Ridolfi, Marco, Nolt, Ira G. and Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401 1997. Measurement of the isotopic ratio distribution of HD(16)O and H(2)(16)O in the 20-38 km altitude range from far-infrared spectra. Geophysical Research Letters 24 (16) , pp. 2003-2006. 10.1029/97GL02022

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Abstract

The altitude distribution of the isotopic ratio between HD(16)O and H(2) (16)O in the stratosphere is derived by retrieving the mixing ratio profiles (from 20 km to 38 km of altitude) of the two isotopic species from far‐infrared emission spectra. The measurements were made with a balloon‐borne Fourier Transform Spectrometer capable of 0.0025 cm(−1) spectral resolution during the IBEX 92 campaign. The retrievals were carried out using the global‐fit procedure on a statistically significant number of spectra for each isotope, in the 40–75 cm(−1) spectral region. This measurement determines the D/H ratio in stratospheric water over an altitude range larger than that of previous measurements. The value of the HD(16)O/H(2) (16)O ratio, normalized to the standard value, ranges from 0.4 to 0.5 (with a 10% random error) in the altitude range studied and is in good agreement with the values previously measured.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	Atmospheric Composition and Structure: General or miscellaneous
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0094-8276/ (accessed 20/02/2014).
Publisher:	American Geophysical Union
ISSN:	0094-8276
Date of First Compliant Deposit:	30 March 2016
Last Modified:	10 May 2023 13:46
URI:	https://orca.cardiff.ac.uk/id/eprint/40059

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