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A study indicating that if Mars could somehow acquire an Earth-like atmospheric …


Biology Articles » Astrobiology » Keeping Mars warm with new super greenhouse gases » Tables

Tables
- Keeping Mars warm with new super greenhouse gases

Table 1.   The 21 fluorine compounds considered for super greenhouse warming

 

CF3CF3 CF3CF2CF3 CF3NF2
CF3CF2NF2 CF3NFCF3 SF5CF3
CF3OCF3 CF3SCF3 SF4(CF3)2
CF3OCF2CF3 CF3SCF2CF3 SF3(CF3)3
CF3OCF2NF2 CF3SCF2NF2 SF2(CF3)4
CF3OCF2OCF3 CF3SCF2SCF3 SF(CF3)5
CF3OCF2SCF3 CF3OCF2NFCF3 S(CF3)6
Of 10 calibrants (see text), only SF6 was chosen as an optimal warmer.

Table 2.   Strong bands in the spectral region of interest, for the selected super greenhouse gases

 

v S
SF4(CF3)2 1,249 540
1,246 533
1,113 459
816 249
815 250
679 383
CF3CF2CF3 1,341 7
1,309 147
1,237 589
1,236 389
1,188 98
1,174 46
1,146 180
1,000 231
726 51
CF3SCF2CF3 1,309 129
1,214 224
1,200 201
1,178 399
1,165 287
1,131 160
1,120 167
1,071 133
948 309
761 21
750 45
SF5CF3 1,243 289
1,239 282
1,134 319
868 319
867 319
859 307
746 115
SF6 916 1,236
743 6
v = frequency, inverse cm; S = intensity at standard temperature and pressure, km/mol. All isotopes are included.

Table 3.   Column amounts to raise grey opacity of a doubled terrestrial atmosphere to 3; lifetimes in present terrestrial atmosphere

 

Gas Suggested column per m2 Lifetime against photolysis, yr
CF3CF2CF3 1.1  × 1022 >1 × 108
CF3SCF2CF3 1.4  × 1022 8950
SF6 5.2  × 1021 3200*
SF5CF3 1.0  × 1022 4050
SF4(CF3)2 8.0  × 1021 3070
* Includes reaction with mesophere's free electrons.


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