re: Ephemeral atmospheres

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re: Ephemeral atmospheres

gbaikie — 4/21/2006 1:45:30 PM (archived)

"My modelling agrees that in this early era Mars would have been wet and mild, but not all the time. Only after giant impacts had stirred-up the atmosphere and boiled off the volatiles (CO2 and H20) would there be an atmosphere for a few thousands or tens of thousands of years, then it would collapse again and wait for the next giant impact - and no, there weren't enough of them to string together into a continuous mild/warm/wet epoch."

A non atmospheric body would radiate heat at different rate then planet with an atmosphere which was reflective to infrared. Did you allow for this and is it a significant affect.
Related to this would the Venus atmosphere affect cooling rate of planetary crust? And would be different if Venus had significant quantities of H2O in it's atmosphere?

The whole thread (37 posts)

Study Reveals Young Mars Was A Wet World - Chris Vancil - 4/20/2006 10:30:21 PM
- Not surprised - Donald - 4/21/2006 4:19:54 AM
  - re: Not surprised - Chris Vancil - 4/21/2006 5:25:10 AM
    - re: Not surprised - Donald - 4/21/2006 12:39:00 PM
  - If I may... - Donald - 4/21/2006 4:47:57 AM
    - re: If I may... - Robert Clark - 4/21/2006 11:09:02 PM
    - re: If I may... - Chris Vancil - 4/21/2006 5:43:17 AM
      - Actually, I think that's improbable - nick hoffman - 4/21/2006 7:55:54 AM
        
        re: Actually, I think that's improbable - Chris Vancil - 4/21/2006 2:36:38 PM
        
        I Beg to differ - nick hoffman - 4/21/2006 8:42:36 PM
        
        re: I Beg to differ - Chris Vancil - 4/21/2006 9:13:10 PM
        
        Instead of hoping for weak little Earth-like creatures just barely surviving under some Martian rock... - ljk - 4/21/2006 5:08:00 PM
        
        re: Instead of hoping for weak little Earth-like creatures just barely surviving under some Martian rock... - Marcia - 4/22/2006 2:45:26 AM
        
        Of course they survive... - Adam - 4/25/2006 9:31:24 PM
        
        re: We work from what we know to what we can imagine (unless we are writing SF). - Chris Vancil - 4/21/2006 8:52:59 PM
        
        re: We work from what we know to what we can imagine (unless we are writing SF). - Robert Clark - 4/21/2006 10:48:14 PM
        
        re: Instead of hoping for weak little Earth-like creatures just barely surviving under some Martian rock... - Lance - 4/21/2006 7:33:50 PM
- re: Study Reveals Young Mars Was A Wet World - phil - 4/21/2006 2:23:15 AM
  - Ephemeral atmospheres - nick hoffman - 4/21/2006 8:01:33 AM
    - re: Ephemeral atmospheres - gbaikie - 4/21/2006 1:45:30 PM
      - It's a bit more complicated than that... - nick hoffman - 4/21/2006 8:38:42 PM
        
        re: It's a bit more complicated than that... - gbaikie - 4/22/2006 1:40:22 AM
  - re: Comets shower - Raoul - 4/21/2006 5:46:53 AM
    - re: Comets shower - Marcia - 4/22/2006 2:56:57 AM
  - re: Study Reveals Young Mars Was A Wet World - Chris Vancil - 4/21/2006 5:35:22 AM
    - re: Study Reveals Young Mars Was A Wet World - Marcia - 4/22/2006 3:00:18 AM
    - Solar mass loss models - Adam - 4/21/2006 11:59:35 AM
      - Reference... - Adam - 4/21/2006 12:48:09 PM
- re: Study Reveals Young Mars Was A Wet World - bruced - 4/20/2006 11:52:24 PM
  - re: Study Reveals Young Mars Was A Wet World - Thanks! - Marcia - 4/22/2006 3:12:22 AM
    - re: Study Reveals Young Mars Was A Wet World - Thanks! - Marcia - 4/22/2006 3:26:55 AM
- Yes, battery acid is "wet".... - Jacob Samorodin - 4/20/2006 11:06:09 PM
  - re: Yes, battery acid is "wet"...snottites. - andrew - 4/26/2006 5:57:36 PM
  - re: I can only surmise you didn't happen to read the article. (n/t) - Chris Vancil - 4/21/2006 5:32:44 AM
    - Life-Marker Chip Planned For ESA Mars Lander - ljk - 4/25/2006 2:39:41 PM
      - re: Pretty cool...thanks! (n/t) - Chris Vancil - 4/27/2006 6:49:09 AM
        
        Astrobiology Strategy for the Exploration of Mars Conference in Washington, D.C. on May 10-12, 2006 - ljk - 4/28/2006 6:30:02 PM

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