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 language | English |
|---|---|
| Pages (from-to) | 610-614 |
| Number of pages | 5 |
| Journal | Icarus |
| Volume | 217 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Feb 2012 |
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Keywords
- Infrared observations
- Venus, Atmosphere
ASJC Scopus subject areas
- Space and Planetary Science
- Astronomy and Astrophysics
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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 journal › Article
}
TY - JOUR
T1 - Latitudinal distribution of HDO abundance above Venus' clouds by ground-based 2.3μm spectroscopy
AU - Matsui, H.
AU - Iwagami, N.
AU - Hosouchi, M.
AU - Ohtsuki, S.
AU - Hashimoto, Joji
PY - 2012/2
Y1 - 2012/2
N2 - 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.
AB - 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.
KW - Infrared observations
KW - Venus, Atmosphere
UR - http://www.scopus.com/inward/record.url?scp=84855353350&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855353350&partnerID=8YFLogxK
U2 - 10.1016/j.icarus.2011.07.026
DO - 10.1016/j.icarus.2011.07.026
M3 - Article
AN - SCOPUS:84855353350
VL - 217
SP - 610
EP - 614
JO - Icarus
JF - Icarus
SN - 0019-1035
IS - 2
ER -