IGPP Seminar Series

Atmospheric loss of Mars: MHD model results and its implications

by Dr. Yingjuan Ma
UCLA, IGPP

Abstract

Evidence has shown that early Martian atmosphere was once wet and warm. It is a big mystery that how Martian atmosphere evolved into its current dry, cold and thin condition. In this presentation, we will discuss the solar wind interaction with Martian atmosphere and the induced atmospheric loss rates during the process. Ion escape loss rates under various conditions are calculated using a multi-species MHD model and projected back to time to estimate the total amount of atmospheric loss. Simulation results indicate that ion escaping through the plasma tail could not be the only reason for the drastic change of ancient Marian atmosphere.
Tuesday, 26 October 2010

Refreshments at 3:45 PM
Lecture at 4:00 PM