Evolution de la composition de l’atmosphère de la Terre

Voici l’évolution de la composition de l’atmosphère terrestre dite sèche (sans nuages) :

Millions d'années dans le passéOxygène (%)Azote (%)Vapeur d'eau (%)CO2 (%)Ammoniac, Méthane (%)Hydrogène, Hélium (%)Hydrogène sulfuré (%)
460002.2828.29029.3840.050
45900.312.7128.26029.2139.290.22
45800.313.1528.31029.1338.660.43
45700.313.5928.36029.0538.030.65
45600.314.0328.41028.9837.40.87
45500.314.4728.47028.936.771.08
45400.314.9128.52028.8236.151.3
45300.315.3428.57028.7535.521.51
45200.315.7828.62028.6734.91.73
45100.316.2128.67028.5934.281.94
45000.316.6428.72028.5233.662.15
44900.317.5529.11028.3432.522.17
44800.318.4729.5028.1631.372.19
44700.319.4129.89027.9730.22.21
44600.3210.3630.29027.7929.022.23
44500.3211.3230.7027.627.822.25
44400.3212.2931.11027.4126.612.27
44300.3213.2831.53027.2125.372.29
44200.3314.2831.95027.0224.122.31
44100.3315.2932.38026.8222.862.33
44000.3316.3532.8026.6121.572.35
43900.3416.6433.97026.5720.082.4
43800.3416.9535.18026.5318.552.45
43700.3517.2736.44026.4816.952.5
43600.3617.6137.75026.4415.292.55
43500.3617.9539.11026.3913.572.61
43400.3718.3140.53026.3411.782.67
43300.3818.6942026.299.922.73
43200.3919.0843.53026.247.972.79
43100.3919.4945.13026.195.952.85
43000.419.946.77026.113.92.92
42900.419.8947.590263.182.95
42800.4119.8748.42025.882.442.97
42700.4119.8649.26025.771.73
42600.4119.8550.12025.650.943.03
42500.4219.8450.99025.530.173.05
42400.4219.7151.55025.2603.06
42300.4219.5452.03024.9403.07
42200.4219.3852.51024.6203.07
42100.4219.2152.99024.303.08
42000.4218.2454024.2303.11
41900.4217.8954.8023.7703.12
41800.4217.5355.61023.3103.12
41700.4217.1856.41022.8603.13
41600.4216.8357.21022.403.14
41500.4216.4157.790.3921.8603.13
41400.4215.9558.181.0821.2603.11
41300.4115.4958.571.7720.6703.1
41200.4115.0458.952.4420.0803.08
41100.4114.5959.333.119.503.07
41000.414.1659.683.7818.9303.05
40900.413.9959.534.6218.4303.03
40800.413.8259.385.4517.9503.01
40700.3913.6659.236.2617.4702.99
40600.3913.4959.097.0617.0102.96
40500.3913.3458.957.8416.5502.94
40400.3813.1858.818.6116.102.92
40300.3813.0358.689.3615.6502.9
40200.3812.8858.5410.115.2202.88
40100.3712.7358.4110.8314.7902.86
40000.3712.5858.2811.5514.3702.85
39900.3712.857.9511.9914.0502.84
39800.3713.0257.6212.4313.7402.83
39700.3613.2357.2912.8613.4402.82
39600.3613.4456.9713.2913.1302.81
39500.3613.6556.6513.7112.8302.8
39400.3613.8656.3314.1312.5302.79
39300.3614.0756.0214.5412.2302.78
39200.3514.2755.7114.9511.9402.78
39100.3514.4755.415.3611.6502.77
39000.3514.6655.115.7611.3602.76
38900.3515.2754.4416.0111.1802.76
38800.3515.8753.7816.2510.9902.76
38700.3516.4753.1216.4910.8102.76
38600.3517.0752.4716.7310.6302.76
38500.3517.6751.8216.9710.4502.75
38400.3518.2651.1717.2110.2602.75
38300.3518.8550.5217.4510.0802.75
38200.3519.4449.8817.689.902.75
38100.3420.0249.2417.929.7302.75
38000.3420.6548.5718.149.5402.75
37900.3421.9347.2218.419.3502.75
37800.3423.245.8818.679.1702.75
37700.3424.4744.5418.938.9802.75
37600.3425.7343.219.198.7902.75
37500.3426.9941.8719.458.602.75
37400.3428.2440.5419.718.4202.75
37300.3429.4939.2219.978.2302.75
37200.3430.7437.920.238.0502.75
37100.3431.9836.5920.487.8702.75
37000.3433.2635.2520.737.6802.74
36900.3434.2634.2120.987.4802.73
36800.3335.2433.1921.237.2802.72
36700.3336.2232.1721.487.0802.71
36600.3337.1831.1721.736.8902.7
36500.3338.1330.1821.986.6902.69
36400.3339.0829.1922.226.502.68
36300.3240.0128.2222.466.3102.67
36200.3240.9327.2622.76.1302.66
36100.3241.8426.3122.935.9402.65
36000.3242.7525.3723.165.7602.64
35900.3243.324.5223.525.6702.67
35800.3243.8723.6523.885.5802.7
35700.3344.4522.7724.255.4902.72
35600.3345.0321.8724.625.402.75
35500.3345.6320.96255.3102.78
35400.3446.2320.0325.395.2102.81
35300.3446.8519.0825.785.1202.84
35200.3447.4718.1226.185.0202.86
35100.3448.1117.1526.594.9202.89
35000.3548.7316.1627.024.8202.93
34900.3549.0515.6527.34.702.95
34800.3549.3715.1327.594.5902.98
34700.3549.6914.6127.884.4703
34600.3650.0214.0728.174.3503.02
34500.3650.3513.5328.474.2303.05
34400.3650.6912.9928.784.1103.08
34300.3651.0312.4329.083.9903.1
34200.3751.3811.8729.43.8603.13
34100.3751.7311.329.713.7303.16
34000.3752.110.730.043.6103.18
33900.3752.4610.2430.213.5103.2
33800.3752.839.7830.393.4103.23
33700.3853.199.3130.573.3103.25
33600.3853.578.8430.753.203.27
33500.3853.948.3630.933.103.29
33400.3854.327.8831.11303.31
33300.3854.77.3931.32.8903.34
33200.3955.096.931.482.7803.36
33100.3955.486.431.672.6803.38
33000.3955.835.9631.852.5703.4
32900.3956.545.5931.572.4903.42
32800.3957.255.2131.282.4203.44
32700.3957.974.8430.992.3503.46
32600.458.74.4630.72.2703.47
32500.459.434.0830.412.203.49
32400.9159.853.6829.962.1103.49
32301.4360.273.2729.512.0303.49
32201.9460.72.8729.061.9403.49
32102.4561.122.4728.611.8603.49
3200361.522.0528.161.7703.49
31902.5162.461.8627.961.6903.52
31802.0163.411.6727.751.6103.55
31701.564.381.4727.541.5203.59
31600.9865.361.2727.331.4303.62
31500.6266.251.0727.071.3403.65
31400.6266.910.8626.711.2503.66
31300.6267.560.6526.351.1503.68
31200.6268.220.4425.981.0503.69
31100.6268.880.2225.610.9503.71
31000.6269.55025.250.8503.72
30900.6270.03024.850.7703.72
30800.6270.51024.460.6803.72
30700.6270.99024.080.603.72
30600.6271.46023.690.5103.72
30500.6271.93023.30.4303.72
30400.6272.4022.920.3403.72
30300.6272.87022.540.2603.71
30200.6173.34022.160.1803.71
30100.6173.81021.780.0903.71
30000.6273.77021.82003.78
29900.6274021.59003.79
29800.6274.22021.36003.8
29700.6274.45021.12003.8
29600.6274.68020.89003.81
29500.6274.9020.66003.81
29400.6275.13020.43003.82
29300.6275.35020.2003.82
29200.6275.58019.97003.83
29100.6275.81019.73003.84
29000.6276.02019.51003.84
28900.6276.33019.19003.85
28801.1476.24018.78003.84
28701.6476.16018.38003.82
28602.1576.07017.97003.81
28503.1775.57017.48003.78
28402.6876.26017.26003.8
28302.1876.95017.04003.83
28201.6877.65016.82003.85
28101.1778.36016.59003.88
28000.6679.07016.36003.9
27900.4179.5016.17003.92
27800.4179.73015.93003.92
27700.4179.96015.69003.93
27600.4180.2015.46003.93
27500.4180.43015.22003.94
27400.4180.66014.99003.94
27300.4180.89014.75003.95
27200.4181.12014.52003.95
27100.4181.35014.28003.95
27000.4181.58014.05003.96
26900.4181.83013.79003.96
26800.4182.09013.52003.97
26700.4182.35013.26003.97
26600.4182.61013003.98
26500.4182.87012.73003.98
26400.4183.13012.47003.99
26300.4183.39012.21003.99
26200.4183.64011.95004
26100.4183.9011.68004
26000.4184.16011.43004.01
25900.7784.11011.12004
25801.1384.06010.81003.99
25701.4984.02010.51003.99
25601.8483.98010.21003.98
25502.1983.9309.91003.97
25402.5483.8909.61003.97
25302.8983.8409.31003.96
25203.2383.809.02003.95
25103.5883.7608.72003.94
25003.9583.6808.43003.94
24903.6184.1308.31003.96
24803.2784.5708.18003.97
24702.9385.0308.05003.99
24602.5885.4807.93004.01
24502.2385.9407.8004.03
24401.8886.407.67004.05
24301.5386.8607.54004.07
24201.1787.3307.41004.09
24100.8187.807.28004.11
24000.4188.307.15004.13
23900.4788.3507.05004.14
23800.5388.406.94004.14
23700.5888.4506.83004.14
23600.6488.506.72004.14
23500.788.5506.61004.14
23400.7588.606.51004.14
23300.8188.6506.4004.14
23200.8688.706.29004.14
23100.9288.7506.18004.15
23001.0388.7606.07004.14
22901.0388.0605.86005.05
22801.0287.3805.66005.94
22701.0286.705.46006.82
22601.0286.0505.26007.68
22501.0185.405.06008.53
22401.0184.7604.87009.36
22301.0184.1404.680010.17
2220183.5204.50010.98
2210182.9204.320011.77
2200182.3504.140012.52
2190182.35040012.64
2180182.3603.870012.76
21701.0182.3703.730012.89
21601.0182.3803.60013.01
21501.0182.3903.460013.13
21401.0282.403.330013.25
21301.0282.4103.20013.37
21201.0282.4203.060013.49
21101.0382.4302.930013.61
21001.0382.4402.80013.73
20901.0482.502.70013.76
20801.0482.5602.590013.8
20701.0582.6302.490013.84
20601.0582.6902.390013.87
20501.0682.7502.290013.91
20401.0682.8102.190013.94
20301.0782.8702.090013.98
20201.0782.9301.980014.01
20101.0882.9901.880014.05
20001.0883.0401.780014.09
19901.0983.0801.710014.13
19801.0983.1201.630014.16
19701.183.1601.550014.19
19601.1183.1901.480014.22
19501.1183.2301.40014.25
19401.1283.2701.330014.29
19301.1283.3101.250014.32
19201.1383.3501.170014.35
19101.1383.3901.10014.38
19001.1483.401.020014.44
18901.1583.4600.940014.45
18801.1583.5100.870014.47
18701.1683.5700.790014.48
18601.1683.6300.720014.49
18501.1783.6800.640014.51
18401.1883.7400.570014.52
18301.1883.7900.490014.54
18201.1983.8500.410014.55
18101.283.900.340014.56
18001.283.9600.260014.57
17901.2183.9600.230014.6
17801.2183.9600.210014.62
17701.2283.9600.180014.64
17601.2283.9500.160014.67
17501.2383.9500.130014.69
17401.2483.9500.110014.71
17301.2483.9400.080014.73
17201.2583.9400.050014.76
17101.2583.9400.030014.78
17001.2683.91000014.82
16901.2683.9000014.83
16801.2783.89000014.83
16701.2783.88000014.84
16601.2883.87000014.84
16501.2883.87000014.85
16401.2983.86000014.85
16301.2983.85000014.86
16201.383.84000014.86
16101.383.83000014.87
16001.3183.81000014.87
15901.3183.81000014.88
15801.3283.8000014.88
15701.3283.79000014.88
15601.3383.78000014.89
15501.3383.77000014.89
15401.3483.76000014.89
15301.3483.75000014.9
15201.3583.75000014.9
15101.3683.74000014.9
15001.3683.73000014.91
14901.3783.71000014.92
14801.3783.69000014.93
14701.3883.67000014.95
14601.3883.65000014.96
14501.3983.64000014.97
14401.3983.62000014.98
14301.483.6000015
14201.4183.58000015.01
14101.4183.56000015.02
14001.4283.54000015.04
13901.4283.53000015.05
13801.4383.51000015.05
13701.4383.5000015.06
13601.4483.49000015.07
13501.4583.47000015.08
13401.4583.46000015.08
13301.4683.45000015.09
13201.4683.43000015.1
13101.4783.42000015.1
13001.4883.41000015.11
12901.4883.39000015.12
12801.4983.37000015.14
12701.583.35000015.15
12601.583.32000015.17
12501.5183.3000015.18
12401.5283.28000015.2
12301.5283.26000015.21
12201.5383.24000015.23
12101.5483.21000015.25
12001.5483.19000015.26
11901.5583.18000015.27
11801.5683.16000015.28
11701.5683.15000015.28
11601.5783.13000015.29
11501.5883.12000015.3
11401.5983.11000015.3
11301.5983.09000015.31
11201.683.08000015.32
11101.6183.06000015.33
11001.6183.05000015.34
10901.6283.06000015.31
10801.6383.07000015.29
10701.6483.09000015.27
10601.6483.1000015.25
10501.6583.11000015.23
10401.6683.12000015.21
10301.6783.14000015.19
10201.6783.15000015.17
10101.6883.16000015.15
10001.6983.17000015.13
9901.783.18000015.12
9801.783.19000015.1
9701.7183.2000015.08
9601.7283.21000015.07
9501.7283.22000015.05
9401.7383.23000015.03
9301.7483.24000015.02
9201.7583.25000015
9101.7583.26000014.98
9001.7683.26000014.97
8901.7883.8000014.41
8801.884.35000013.84
8701.8284.91000013.26
8601.8485.48000012.67
8501.8686.06000012.07
8401.8886.65000011.46
8301.9187.25000010.84
8201.9387.86000010.21
8101.9588.4800009.56
8001.9589.1300008.91
7902.189.6700008.23
7802.2590.2200007.53
7702.490.7700006.82
7602.5591.3400006.1
7502.7191.9200005.37
7402.8692.500004.63
7303.0393.100003.87
7203.1993.700003.11
7103.3594.3200002.32
7003.5394.9300001.53
6904.1694.3800001.45
6804.7893.8400001.38
6705.493.2900001.3
6606.0192.7600001.22
6506.6292.2200001.15
6407.2291.700001.08
6307.8291.1700001
6208.4290.6500000.93
610990.1400000.86
6009.6189.600000.78
59011.3487.8800000.77
58013.0186.2200000.76
57014.6484.6100000.75
56014.7684.4900000.75
55014.7184.5300000.75
54014.8384.4100000.75
53014.9984.2500000.75
52015.1184.1300000.75
51015.1184.1300000.76
50015.0184.2200000.76
49015.1584.0800000.77
48015.2483.9800000.77
47015.383.9200000.78
46015.5383.6800000.79
45015.4583.7500000.8
44015.6583.5500000.8
43015.5383.6600000.81
42015.6883.500000.82
41015.683.5600000.83
40014.5984.5500000.85
39012.3283.2100004.47
38020.2679.2800000.45
3702079.5700000.43
36019.679.9700000.43
35020.878.7700000.43
34024.974.6700000.43
33029.869.7700000.43
3203267.5700000.43
31034.265.3700000.43
30035.0564.5200000.43
29035.1564.4200000.43
28034.465.1700000.43
27032.167.4700000.43
26023.2576.3200000.43
25018.181.4700000.43
24013.286.3700000.43
23013.1582.0200004.83
2201674.800009.2
21019.2575.5500005.2
20012.686.200001.2
1901879.100002.9
18020.175.300004.6
1702275.2700002.73
16022.976.6700000.43
150237700000
14022.577.500000
13022.4577.5500000
12022.4577.5500000
11022.977.100000
10024.375.700000
9024.975.100000
8025.2574.7500000
7025.0574.9500000
6025.774.300000
5025.2574.7500000
4024.875.200000
3023.8576.1500000
2022.577.500000
1020.9578.0500000
020.978.0800000

Il s’agit d’estimation à partir de carottes dans les glaciers des pôles et d’études géologiques de la roche sur Terre, il n’existe pas de chiffre précis.

Ainsi contrairement à ce que l’on peut croire, il y a surtout de l’azote dans l’atmosphère, et non en grande majorité de l’oxygène. De plus, l’apparition de l’oxygène est très récent comparé à l’age de la Terre.

A 35% d’oxygène, le ciel commence à s’embraser (Carbonifère-Permien).




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