Timeline for Why is Mars cold?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Oct 10, 2019 at 10:52 | comment | added | pela | @opa I added references and calculations :) | |
| Oct 10, 2019 at 10:52 | history | edited | pela | CC BY-SA 4.0 |
Added references and calculations.
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| Oct 10, 2019 at 9:51 | comment | added | pela | @opa References for the abundance of CO$_2$ in Earth's atmosphere are plentiful, see e.g. NOAA (it's 0.04% by volume, so roughly 0.06% by mass). As for the comparison, I just did the calculation $\rho_{\mathrm{CO}_2,\mathrm{Earth}} / \rho_{\mathrm{CO}_2,\mathrm{Mars}} \simeq 0.06 / (0.95\times0.006) \sim 10$. I used the Mars-to-Earth pressure ratio, which is slightly wrong — I should instead use the density ratio, which actually increases the ratio a bit. | |
| Oct 9, 2019 at 20:50 | comment | added | Krupip | "However, it is actually a higher absolute abundance of CO2 molecules than on Earth, which only has a CO2 abundance of 0.06% (by mass)." citation needed? AFAIK there is still less CO2 per unit area and in the air column on mars than on earth, though it may still be in the same order of magnitude, and actual measurements for the mass for both earth and mars for CO2 is scarce from google searches. | |
| Oct 9, 2019 at 12:40 | history | answered | pela | CC BY-SA 4.0 |