Latitudinal distribution of HDO abundance above Venus' clouds by ground-based 2.3μm spectroscopy

H. Matsui, N. Iwagami, M. Hosouchi, S. Ohtsuki, Joji Hashimoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The abundance of HDO above the clouds in the dayside atmosphere of Venus was measured by ground-based 2.3μm spectroscopy over 4 days. This is the first HDO observation above the clouds in this wavelength region corresponding to a new height region. The latitudinal distributions found show no clearly defined structure. The disk-averaged mixing ratio is 0.22±0.03ppm for a representative height region of 62-67km. This is consistent with measurements found in previous studies. Based on previous H 2O measurements, the HDO/H 2O ratio is found to be 140±20 times larger than the telluric ratio. This lies between the ratios of 120±40 and 240±25, respectively, reported for the 30-40km region by ground-based nightside spectroscopy and for the 80-100km region by solar occultation measurement on board the Venus Express.

Original languageEnglish
Pages (from-to)610-614
Number of pages5
JournalIcarus
Volume217
Issue number2
DOIs
Publication statusPublished - Feb 2012

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Venus clouds
Venus
spectroscopy
Venus (planet)
occultation
mixing ratios
atmospheres
mixing ratio
wavelengths
distribution
wavelength
atmosphere

Keywords

  • Infrared observations
  • Venus, Atmosphere

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Latitudinal distribution of HDO abundance above Venus' clouds by ground-based 2.3μm spectroscopy. / Matsui, H.; Iwagami, N.; Hosouchi, M.; Ohtsuki, S.; Hashimoto, Joji.

In: Icarus, Vol. 217, No. 2, 02.2012, p. 610-614.

Research output: Contribution to journalArticle

Matsui, H. ; Iwagami, N. ; Hosouchi, M. ; Ohtsuki, S. ; Hashimoto, Joji. / Latitudinal distribution of HDO abundance above Venus' clouds by ground-based 2.3μm spectroscopy. In: Icarus. 2012 ; Vol. 217, No. 2. pp. 610-614.
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