Atmospheric Concentration of Carbon Dioxide, 1000-2007
Year
Carbon Dioxide
Parts Per Million by Volume
1000
277.00
1001
277.01
1002
277.02
1003
277.03
1004
277.04
1005
277.05
1006
277.06
1007
277.07
1008
277.08
1009
277.09
1010
277.10
1011
277.11
1012
277.12
1013
277.13
1014
277.14
1015
277.15
1016
277.16
1017
277.17
1018
277.18
1019
277.19
1020
277.20
1021
277.21
1022
277.22
1023
277.23
1024
277.24
1025
277.25
1026
277.26
1027
277.27
1028
277.28
1029
277.29
1030
277.30
1031
277.31
1032
277.32
1033
277.33
1034
277.34
1035
277.35
1036
277.36
1037
277.37
1038
277.38
1039
277.39
1040
277.40
1041
277.41
1042
277.42
1043
277.43
1044
277.44
1045
277.45
1046
277.46
1047
277.47
1048
277.48
1049
277.49
1050
277.50
1051
277.53
1052
277.56
1053
277.59
1054
277.62
1055
277.65
1056
277.68
1057
277.71
1058
277.74
1059
277.77
1060
277.80
1061
277.83
1062
277.86
1063
277.89
1064
277.92
1065
277.95
1066
277.98
1067
278.01
1068
278.04
1069
278.07
1070
278.10
1071
278.13
1072
278.16
1073
278.19
1074
278.22
1075
278.25
1076
278.28
1077
278.31
1078
278.34
1079
278.37
1080
278.40
1081
278.43
1082
278.46
1083
278.49
1084
278.52
1085
278.55
1086
278.58
1087
278.61
1088
278.64
1089
278.67
1090
278.70
1091
278.73
1092
278.76
1093
278.79
1094
278.82
1095
278.85
1096
278.88
1097
278.91
1098
278.94
1099
278.97
1100
279.00
1101
278.98
1102
278.96
1103
278.94
1104
278.92
1105
278.90
1106
278.88
1107
278.86
1108
278.84
1109
278.82
1110
278.80
1111
278.78
1112
278.76
1113
278.74
1114
278.72
1115
278.70
1116
278.68
1117
278.66
1118
278.64
1119
278.62
1120
278.60
1121
278.58
1122
278.56
1123
278.54
1124
278.52
1125
278.50
1126
278.48
1127
278.46
1128
278.44
1129
278.42
1130
278.40
1131
278.38
1132
278.36
1133
278.34
1134
278.32
1135
278.30
1136
278.28
1137
278.26
1138
278.24
1139
278.22
1140
278.20
1141
278.18
1142
278.16
1143
278.14
1144
278.12
1145
278.10
1146
278.08
1147
278.06
1148
278.04
1149
278.02
1150
278.00
1151
277.97
1152
277.94
1153
277.91
1154
277.88
1155
277.85
1156
277.82
1157
277.79
1158
277.76
1159
277.73
1160
277.70
1161
277.67
1162
277.64
1163
277.61
1164
277.58
1165
277.55
1166
277.52
1167
277.49
1168
277.46
1169
277.43
1170
277.40
1171
277.37
1172
277.34
1173
277.31
1174
277.28
1175
277.25
1176
277.22
1177
277.19
1178
277.16
1179
277.13
1180
277.10
1181
277.07
1182
277.04
1183
277.01
1184
276.98
1185
276.95
1186
276.92
1187
276.89
1188
276.86
1189
276.83
1190
276.80
1191
276.77
1192
276.74
1193
276.71
1194
276.68
1195
276.65
1196
276.62
1197
276.59
1198
276.56
1199
276.53
1200
276.50
1201
276.45
1202
276.40
1203
276.35
1204
276.30
1205
276.25
1206
276.20
1207
276.15
1208
276.10
1209
276.05
1210
276.00
1211
276.07
1212
276.14
1213
276.21
1214
276.28
1215
276.35
1216
276.42
1217
276.48
1218
276.55
1219
276.62
1220
276.69
1221
276.76
1222
276.83
1223
276.90
1224
276.97
1225
277.04
1226
277.11
1227
277.18
1228
277.25
1229
277.32
1230
277.38
1231
277.45
1232
277.52
1233
277.59
1234
277.66
1235
277.73
1236
277.80
1237
277.87
1238
277.94
1239
278.01
1240
278.08
1241
278.15
1242
278.22
1243
278.28
1244
278.35
1245
278.42
1246
278.49
1247
278.56
1248
278.63
1249
278.70
1250
278.77
1251
278.84
1252
278.91
1253
278.98
1254
279.05
1255
279.12
1256
279.18
1257
279.25
1258
279.32
1259
279.39
1260
279.46
1261
279.53
1262
279.60
1263
279.67
1264
279.74
1265
279.81
1266
279.88
1267
279.95
1268
280.02
1269
280.08
1270
280.15
1271
280.22
1272
280.29
1273
280.36
1274
280.43
1275
280.50
1276
280.57
1277
280.64
1278
280.71
1279
280.78
1280
280.85
1281
280.92
1282
280.98
1283
281.05
1284
281.12
1285
281.19
1286
281.26
1287
281.33
1288
281.40
1289
281.47
1290
281.54
1291
281.61
1292
281.68
1293
281.75
1294
281.82
1295
281.88
1296
281.95
1297
282.02
1298
282.09
1299
282.16
1300
282.23
1301
282.30
1302
282.37
1303
282.44
1304
282.51
1305
282.58
1306
282.65
1307
282.72
1308
282.78
1309
282.85
1310
282.92
1311
282.99
1312
283.06
1313
283.13
1314
283.20
1315
283.27
1316
283.34
1317
283.41
1318
283.48
1319
283.55
1320
283.62
1321
283.68
1322
283.75
1323
283.82
1324
283.89
1325
283.96
1326
284.03
1327
284.10
1328
284.17
1329
284.24
1330
284.31
1331
284.38
1332
284.45
1333
284.52
1334
284.58
1335
284.65
1336
284.72
1337
284.79
1338
284.86
1339
284.93
1340
285.00
1341
285.00
1342
285.00
1343
285.00
1344
285.00
1345
285.00
1346
285.00
1347
285.00
1348
285.00
1349
285.00
1350
285.00
1351
284.94
1352
284.89
1353
284.83
1354
284.77
1355
284.71
1356
284.66
1357
284.60
1358
284.54
1359
284.49
1360
284.43
1361
284.37
1362
284.31
1363
284.26
1364
284.20
1365
284.14
1366
284.09
1367
284.03
1368
283.97
1369
283.91
1370
283.86
1371
283.80
1372
283.74
1373
283.69
1374
283.63
1375
283.57
1376
283.51
1377
283.46
1378
283.40
1379
283.34
1380
283.29
1381
283.23
1382
283.17
1383
283.11
1384
283.06
1385
283.00
1386
282.98
1387
282.96
1388
282.94
1389
282.92
1390
282.89
1391
282.87
1392
282.85
1393
282.83
1394
282.81
1395
282.79
1396
282.77
1397
282.75
1398
282.73
1399
282.71
1400
282.68
1401
282.66
1402
282.64
1403
282.62
1404
282.60
1405
282.58
1406
282.56
1407
282.54
1408
282.52
1409
282.49
1410
282.47
1411
282.45
1412
282.43
1413
282.41
1414
282.39
1415
282.37
1416
282.35
1417
282.33
1418
282.31
1419
282.28
1420
282.26
1421
282.24
1422
282.22
1423
282.20
1424
282.18
1425
282.16
1426
282.14
1427
282.12
1428
282.09
1429
282.07
1430
282.05
1431
282.03
1432
282.01
1433
281.99
1434
281.97
1435
281.95
1436
281.93
1437
281.91
1438
281.88
1439
281.86
1440
281.84
1441
281.82
1442
281.80
1443
281.78
1444
281.76
1445
281.74
1446
281.72
1447
281.69
1448
281.67
1449
281.65
1450
281.63
1451
281.61
1452
281.59
1453
281.57
1454
281.55
1455
281.53
1456
281.51
1457
281.48
1458
281.46
1459
281.44
1460
281.42
1461
281.40
1462
281.38
1463
281.36
1464
281.34
1465
281.32
1466
281.29
1467
281.27
1468
281.25
1469
281.23
1470
281.21
1471
281.19
1472
281.17
1473
281.15
1474
281.13
1475
281.11
1476
281.08
1477
281.06
1478
281.04
1479
281.02
1480
281.00
1481
281.04
1482
281.08
1483
281.12
1484
281.16
1485
281.20
1486
281.24
1487
281.28
1488
281.32
1489
281.36
1490
281.40
1491
281.44
1492
281.48
1493
281.52
1494
281.56
1495
281.60
1496
281.64
1497
281.68
1498
281.72
1499
281.76
1500
281.80
1501
281.84
1502
281.88
1503
281.92
1504
281.96
1505
282.00
1506
281.98
1507
281.96
1508
281.94
1509
281.91
1510
281.89
1511
281.87
1512
281.85
1513
281.83
1514
281.81
1515
281.79
1516
281.77
1517
281.74
1518
281.72
1519
281.70
1520
281.68
1521
281.66
1522
281.64
1523
281.62
1524
281.60
1525
281.57
1526
281.55
1527
281.53
1528
281.51
1529
281.49
1530
281.47
1531
281.45
1532
281.43
1533
281.40
1534
281.38
1535
281.36
1536
281.34
1537
281.32
1538
281.30
1539
281.28
1540
281.26
1541
281.23
1542
281.21
1543
281.19
1544
281.17
1545
281.15
1546
281.13
1547
281.11
1548
281.09
1549
281.06
1550
281.04
1551
281.02
1552
281.00
1553
280.98
1554
280.96
1555
280.94
1556
280.91
1557
280.89
1558
280.87
1559
280.85
1560
280.83
1561
280.81
1562
280.79
1563
280.77
1564
280.74
1565
280.72
1566
280.70
1567
280.68
1568
280.66
1569
280.64
1570
280.62
1571
280.60
1572
280.57
1573
280.55
1574
280.53
1575
280.51
1576
280.49
1577
280.47
1578
280.45
1579
280.43
1580
280.40
1581
280.38
1582
280.36
1583
280.34
1584
280.32
1585
280.30
1586
280.28
1587
280.26
1588
280.23
1589
280.21
1590
280.19
1591
280.17
1592
280.15
1593
280.13
1594
280.11
1595
280.09
1596
280.06
1597
280.04
1598
280.02
1599
280.00
1600
280.00
1601
280.00
1602
280.00
1603
280.00
1604
280.00
1605
280.00
1606
280.00
1607
280.00
1608
280.00
1609
280.00
1610
280.00
1611
280.00
1612
280.00
1613
280.00
1614
280.00
1615
280.00
1616
280.00
1617
280.00
1618
280.00
1619
280.00
1620
280.00
1621
280.00
1622
280.00
1623
280.00
1624
280.00
1625
280.00
1626
280.00
1627
280.00
1628
280.00
1629
280.00
1630
280.00
1631
280.00
1632
280.00
1633
280.00
1634
280.00
1635
280.00
1636
280.00
1637
280.00
1638
280.00
1639
280.00
1640
280.00
1641
280.00
1642
280.00
1643
280.00
1644
280.00
1645
280.00
1646
280.03
1647
280.06
1648
280.09
1649
280.11
1650
280.14
1651
280.17
1652
280.20
1653
280.23
1654
280.26
1655
280.29
1656
280.31
1657
280.34
1658
280.37
1659
280.40
1660
280.43
1661
280.46
1662
280.49
1663
280.51
1664
280.54
1665
280.57
1666
280.60
1667
280.63
1668
280.66
1669
280.69
1670
280.71
1671
280.74
1672
280.77
1673
280.80
1674
280.83
1675
280.86
1676
280.89
1677
280.91
1678
280.94
1679
280.97
1680
281.00
1681
280.97
1682
280.94
1683
280.91
1684
280.89
1685
280.86
1686
280.83
1687
280.80
1688
280.77
1689
280.74
1690
280.71
1691
280.69
1692
280.66
1693
280.63
1694
280.60
1695
280.57
1696
280.54
1697
280.51
1698
280.49
1699
280.46
1700
280.43
1701
280.40
1702
280.37
1703
280.34
1704
280.31
1705
280.29
1706
280.26
1707
280.23
1708
280.20
1709
280.17
1710
280.14
1711
280.11
1712
280.09
1713
280.06
1714
280.03
1715
280.00
1716
279.89
1717
279.78
1718
279.67
1719
279.56
1720
279.45
1721
279.34
1722
279.23
1723
279.12
1724
279.01
1725
278.90
1726
278.79
1727
278.68
1728
278.57
1729
278.46
1730
278.34
1731
278.23
1732
278.12
1733
278.01
1734
277.90
1735
277.79
1736
277.68
1737
277.57
1738
277.46
1739
277.35
1740
277.24
1741
277.13
1742
277.02
1743
276.91
1744
276.80
1745
276.80
1746
276.79
1747
276.79
1748
276.78
1749
276.78
1750
276.77
1751
276.77
1752
276.76
1753
276.76
1754
276.75
1755
276.75
1756
276.74
1757
276.74
1758
276.73
1759
276.73
1760
276.72
1761
276.72
1762
276.71
1763
276.71
1764
276.70
1765
276.81
1766
276.92
1767
277.03
1768
277.14
1769
277.26
1770
277.37
1771
277.48
1772
277.59
1773
277.70
1774
277.81
1775
277.92
1776
278.03
1777
278.14
1778
278.26
1779
278.37
1780
278.48
1781
278.59
1782
278.70
1783
278.81
1784
278.92
1785
279.03
1786
279.14
1787
279.26
1788
279.37
1789
279.48
1790
279.59
1791
279.70
1792
279.86
1793
280.03
1794
280.19
1795
280.36
1796
280.52
1797
280.68
1798
280.85
1799
281.01
1800
281.18
1801
281.34
1802
281.50
1803
281.67
1804
281.83
1805
282.00
1806
282.16
1807
282.32
1808
282.49
1809
282.65
1810
282.82
1811
282.98
1812
283.14
1813
283.31
1814
283.47
1815
283.64
1816
283.80
1817
283.77
1818
283.74
1819
283.71
1820
283.68
1821
283.65
1822
283.62
1823
283.59
1824
283.56
1825
283.53
1826
283.50
1827
283.47
1828
283.43
1829
283.40
1830
283.37
1831
283.34
1832
283.31
1833
283.28
1834
283.25
1835
283.22
1836
283.19
1837
283.16
1838
283.13
1839
283.10
1840
284.18
1841
285.25
1842
286.33
1843
287.40
1844
287.25
1845
287.10
1846
286.95
1847
286.80
1848
287.00
1849
287.20
1850
287.40
1851
287.60
1852
287.80
1853
288.00
1854
288.20
1855
288.27
1856
288.35
1857
288.42
1858
288.49
1859
288.57
1860
288.64
1861
288.71
1862
288.79
1863
288.86
1864
288.93
1865
289.01
1866
289.08
1867
289.15
1868
289.23
1869
289.30
1870
289.34
1871
289.38
1872
289.42
1873
289.46
1874
289.50
1875
289.70
1876
289.90
1877
290.10
1878
290.30
1879
290.52
1880
290.74
1881
290.97
1882
291.19
1883
291.41
1884
291.63
1885
291.86
1886
292.08
1887
292.30
1888
292.59
1889
292.88
1890
293.18
1891
293.47
1892
293.76
1893
294.05
1894
294.34
1895
294.63
1896
294.93
1897
295.22
1898
295.51
1899
295.80
1900
295.55
1901
295.30
1902
295.05
1903
294.80
1904
295.85
1905
296.90
1906
297.48
1907
298.05
1908
298.63
1909
299.20
1910
299.42
1911
299.63
1912
299.85
1913
300.07
1914
300.28
1915
300.50
1916
300.68
1917
300.87
1918
301.05
1919
301.23
1920
301.42
1921
301.60
1922
302.25
1923
302.90
1924
303.55
1925
304.20
1926
304.85
1927
305.50
1928
305.64
1929
305.78
1930
305.91
1931
306.05
1932
306.19
1933
306.33
1934
306.46
1935
306.60
1936
306.76
1937
306.93
1938
307.09
1939
307.25
1940
307.41
1941
307.58
1942
307.74
1943
307.90
1944
308.38
1945
308.86
1946
309.34
1947
309.82
1948
310.30
1949
310.78
1950
311.26
1951
311.74
1952
312.22
1953
312.70
1954
313.22
1955
313.73
1956
314.25
1957
314.77
1958
315.33
1959
315.98
1960
316.91
1961
317.65
1962
318.45
1963
318.99
1964
318.68
1965
320.03
1966
321.37
1967
322.18
1968
323.05
1969
324.62
1970
325.68
1971
326.32
1972
327.46
1973
329.68
1974
330.17
1975
331.14
1976
332.06
1977
333.78
1978
335.40
1979
336.78
1980
338.70
1981
340.11
1982
340.89
1983
342.84
1984
344.10
1985
345.87
1986
347.19
1987
348.98
1988
351.45
1989
352.89
1990
354.16
1991
355.49
1992
356.27
1993
356.96
1994
358.63
1995
360.62
1996
362.37
1997
363.47
1998
366.50
1999
368.14
2000
369.41
2001
371.07
2002
373.16
2003
375.80
2004
377.55
2005
379.75
2006
381.85
2007
383.72
Source: Data from Mauna Loa by Scripps Institute of Oceanography, CDIAC, and NOAA/ESRL at www.esrl.noaa.gov/gmd/ccgg/trends, updated January 2008, with long term historical data compiled by Worldwatch Institute from Scripps, ORNL, and IPCC.
