How important is CO2 to planetary habitability?
How important is CO2 to planetary habitability?
How important is CO2 to planetary habitability?
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So, CO 2 -rich case <strong>is</strong> potentially<br />
habitable. Is it likely?<br />
• 10 bars CO 2 on GJ581d ~4-6 bars equivalent on Earth /<br />
Venus (fac<strong>to</strong>r 10-100 less than their <strong>to</strong>tal inven<strong>to</strong>ries)<br />
• H 2 / He envelope also possible (c.f. Neptune @ 17 m E )<br />
• But intense XUV & stellar wind for first ~1 GYr from GJ581<br />
• More soph<strong>is</strong>ticated modelling <strong>is</strong> needed! (H 3<br />
+<br />
etc.)
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