Mesospheric vertical thermal structure and winds on Venus from HHSMT CO spectral-line observations

Details Mesospheric vertical thermal structure and winds on Venus from HHSMT CO spectral-line observations Mesospheric vertical thermal structure and winds on Venus from HHSMT CO spectral-line observations

2008-09-16

arxiv.org/abs/0809.2743v1

Planetary and Space Science, Volume 56, Issue 10, Ground-based and Venus Express Coordinated Campaign, Ground-based and Venus

Astronomy and Astrophysics

Astrophysics

35 pages, 18 figures. Shortcut URL to this page: http://www.sciencedirect.com/science/journal/00320633

Scientific paper

10.1016/j.pss.2008.07.004

We report vertical thermal structure and wind velocities in the Venusian mesosphere retrieved from carbon monoxide (12CO J=2-1 and 13CO J=2-1) spectral line observations obtained with the Heinrich Hertz Submillimeter Telescope (HHSMT). We observed the mesosphere of Venus from two days after the second Messenger flyby of Venus (on June 5 2007 at 23:10 UTC) during five days. Day-to-day and day-to-night temperature variations and short-term fluctuations of the mesospheric zonal flow were evident in our data. The extensive layer of warm air detected recently by SPICAV at 90 - to 100 km altitude is also detected in the temperature profiles reported here. These data were part of a coordinated ground-based Venus observational campaign in support of the ESA Venus Express mission. Furthermore, this study attempts to cross-calibrate space- and ground-based observations, to constrain radiative transfer and retrieval algorithms for planetary atmospheres, and to contribute to a more thorough understanding of the global patterns of circulation of the Venusian atmosphere.

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