Search Publications

Thermal structure of the Venusian atmosphere from the sub-cloud region to the mesosphere as observed by radio occultation

Tellmann, Silvia; Pätzold, Martin; Imamura, Takeshi +9 more

We present distributions of the zonal-mean temperature and static stability in the Venusian atmosphere obtained from Venus Express and Akatsuki radio occultation profiles penetrating down to an altitude of 40 km. At latitudes equatorward of 75°, static stability derived from the observed temperature profiles is consistent with previous in-situ mea…

Development of an ensemble Kalman filter data assimilation system for the Venusian atmosphere

Sugimoto, Norihiko; Takagi, Masahiro; Kouyama, Toru +3 more

The size and mass of Venus is similar to those of the Earth; however, its atmospheric dynamics are considerably different and they are poorly understood due to limited observations and computational difficulties. Here, we developed a data assimilation system based on the local ensemble transform Kalman filter (LETKF) for a Venusian Atmospheric GCM…

Weak, Quiet Magnetic Fields Seen in the Venus Atmosphere

Luhmann, J. G.; Russell, C. T.; Zhang, T. L. +2 more

The existence of a strong internal magnetic field allows probing of the interior through both long term changes of and short period fluctuations in that magnetic field. Venus, while Earth’s twin in many ways, lacks such a strong intrinsic magnetic field, but perhaps short period fluctuations can still be used to probe the electrical conductivity o…