The structure of Venus' middle atmosphere and ionosphere

Details The structure of Venus' middle atmosphere and ionosphere The structure of Venus' middle atmosphere and ionosphere

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007natur.450..657p&link_type=abstract

Nature, Volume 450, Issue 7170, pp. 657-660 (2007).

Computer Science

Sound

27

Scientific paper

The atmosphere and ionosphere of Venus have been studied in the past by spacecraft with remote sensing or in situ techniques. These early missions, however, have left us with questions about, for example, the atmospheric structure in the transition region from the upper troposphere to the lower mesosphere (50-90km) and the remarkably variable structure of the ionosphere. Observations become increasingly difficult within and below the global cloud deck (<50km altitude), where strong absorption greatly limits the available investigative spectrum to a few infrared windows and the radio range. Here we report radio-sounding results from the first Venus Express Radio Science (VeRa) occultation season. We determine the fine structure in temperatures at upper cloud-deck altitudes, detect a distinct day-night temperature difference in the southern middle atmosphere, and track day-to-day changes in Venus' ionosphere.

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