Ganna (Anya) Portyankina (University of Colorado Boulder, LASP)
Fri, February 2, 2018, 10:30am - 11:30am
Host: Jack Holt
Abstract: MARS: Spring on Mars is a time of active changes in its polar areas, at latitudes covered by seasonal CO2 ice. The volatile nature of the CO2 sublimation in spring leads to cold jet eruptions that erode the surface, redistribute loose material, and lift dust into the atmosphere. I will summarize 6 Martian Years of observations of this seasonal activity in the southern and northern Martian polar areas.
ENCELADUS: Southern polar regions of a small satellite of Saturn Enceladus are source of cold jets too, while of a very different scale. The jets of Enceladus were observed by Cassini spacecraft for more than 12 years. I will focus on their water vapor component, its modeling that was done to analyze UV observations, and the questions Cassini left unanswered.