3:30 PM - 4:45 PM
[PCG21-P06] Monitoring Observations of Millimeter-Wave Band Spectral Lines of Carbon Monoxide in the Middle Atmospheres of Venus with the SPART Telescope
Keywords:Venus, Ground-based Radio Telescope, Solar Activity
The results observed with SPART showed the disk averaged mixing ratios of CO derived at the altitude of around 80 km in case of Venus were around 60 ppmv during 2011 to 2015. This observing period corresponds to the solar cycle 24 maximum phase according to the 1 GHz band flux data observed with the Nobeyama Radio Polarimeters (NoRP). The mixing ratios of CO seem to be lower than those observed during the solar cycle 22 maximum phase. These suggest that solar activities might have no small effect on the abundance variations of CO.