[IGPP Everyone] Reminder - Today - Friday April 26, 2019 - Space Physics Seminar - Spring Quarter

[Marjorie Sowmendran]

Reminder – Today – Friday April 26, 2019 

                                                                   SPACE PHYSICS SEMINAR
DEPARTMENT OF EARTH, PLANETARY, AND SPACE SCIENCES

DEPARTMENT OF ATMOSPHERIC AND OCEANIC SCIENCES

UNIVERSITY OF CALIFORNIA, LOS ANGELES

(AOS M275C, EPSS M288C)







Venus: Ionospheric heavy ion flows and H+/O+ escape rates



Moa Persson 

Swedish Institute of Space Physics



ABSTRACT

I will present my recent studies on the Venusian plasma environment. First, I have studied the ion dynamics in the Venusian ionosphere near the North Pole, where we find a surprising dusk-to-dawn flow near the polar terminator region. This contrasts the previous measurements by Pioneer Venus in the equatorial region where they found a day-to-night flow. Second, I will show our recent findings on the H+/O+ escape rates and its dependence on upstream parameters. We have shown that the ratio of H+/O+ escape rate decreases from solar minimum to maximum. This is an important characteristic of the Venusian atmospheric escape as it is highly connected to the escape of water and the atmospheric evolution. Last, I will present
some preliminary results from a recent study on the O+ escape rates and its dependence on various upstream parameters.

Friday, April 26, 2019



Room 6704 Geology

3:30 - 5:00 PM



In-Charge: C. T. Russell 
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