"What ceramics have the property of emitting infrared rays (wave length) when it was warmed?"
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Seminar Detail
Mars: where did all the water go?
Presenter: Erika Harnett
October 2, 2007 02:30 PM Pacific
Evidence indicates that Mars was warmer and wetter in the past. In order for water to have been stable, the atmosphere must have been thicker than current conditions. I will discuss possible loss mechanisms in the Martian history, paying particular attention to the mechanisms by which the atmosphere may have been lost to space. I will present results from numerical simulations that show how the loss of the ionosphere to space due to interactions with the solar wind is modulated by both the orientation of Mars' anomalous magnetic field and the solar wind conditions themselves. Studying how the ionospheric loss rate is modulated by solar storms increases the confidence in predictions of past loss rates, as past nominal solar wind conditions are analogous to current day storm conditions.
Participation Instructions
With a Polycom....RSVP to Marco Boldt (Marco.Boldt@nasa.gov) and connect to WebEx as instructed below. If you need Polycom help during the live event, message Marco Boldt in WebEx.
The slides from the seminar can be accessed real-time using WebEx at:
https://nasa.webex.com
Enter the meeting number: 925 183 719 Hit the "join now" button.
Enter your name or site name (this is not an assigned log-in name, please use your institution name or your first and last name), email and the password: harnett123* (case sensitive)
If you've never joined a WebEx meeting before, please allow an extra 5-10 minutes to install the plug-in.
Without a Polycom...There are two ways to participate:
1) You can listen to the seminar on the telephone while viewing the slides in WebEx (see WebEx instructions above). The NASA conference phone number will be displayed when joining the WebEx meeting.
2) You can watch the Realplayer webcast at: http://vanseg-1.arc.nasa.gov/2007/AB071002-01.ram and view the slides in WebEx (see WebEx instructions above) There is a 30 second delay for the webcast, so you will need to control the slides manually using the arrow buttons in WebEx. Questions for the speaker can be posted in the WebEx chat area to be answered at the end of the talk. Do not try to watch the Realplayer webcast at the same time as the Polycom or the phone. Due to the delay in the webcast, it will sound awful, unless you like dissonance.December 21, 2007
