BYRD CO2 DATA			
*************			
University of Bern, Sidlerstr. 5, 3012 Bern			
24.2.2000/ai			
for further questions: indermuehle@climate.unibe.ch			
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References for the data: 			
Neftel, A., H. Oeschger, T. Staffelbach and B. Stauffer, CO2 record in the 			
Byrd ice core 50,000-5,000 years BP, Nature 331, 609-611, 1988 			
			
Staffelbach, T., B. Stauffer, A. Sigg and H. Oeschger, CO2 measurements  			
from polar ice cores: more data from different sites, Tellus 43B, 91-96, 1991  			
			
O. Marchal, T.F. Stocker, F. Joos, A. Indermühle, T. Blunier, J. Tschumi,			
Modelling the concentration of atmospheric CO2 during the Younger Dryas climate event,			
Climate Dynamics, 15, 341-354, 1999.			

Reference for the dating:			
Blunier, T., J. Chappellaz, J. Schwander, A. Dällenbach, B. Stauffer, T. Stocker, D. Raynaud, 			
J. Jouzel, H.B. Clausen, C.U. Hammer, and S.J. Johnsen, Asynchrony of Antarctic and 			
Greenland climate change during the last glacial period, Nature, 394, 739-743, 1998.			
			
This dating is a slightly modified version of the dating in			
Stauffer, B, T. Blunier,  A. Dällenbach, A. Indermühle, J. Schwander, T. Stocker, J. Tschumi,			
J. Chappelaz, D. Raynaud, C. Hammer, H.B. Clausen, Atmospheric CO2 concentration and 			
millennial-scale climate change during the last glacial period, Nature, 392, 59-62, 1998.			
			
depth is top of interval			
BP is before 1950			
Mean values are mean values over 50 cm sections			
Sigma mean is sigma for the mean value			
			
depth	Gasage 	CO2 mean	sigma mean
[m]	[yr BP]	[ppmv]	[ppmv]
1050.970	11302	271.6	2.2
1051.000	11303	262.4	4.2
1059.555	11437	265.1	2.3
1063.465	11499	269.9	2.8
1069.400	11592	265.0	4.2
1069.465	11593	265.3	2.0
1075.920	11693	261.9	7.2
1079.680	11751	262.5	0.8
1079.700	11752	259.7	4.2
1090.600	11923	258.7	4.2
1097.900	12031	255.0	17.3
1097.960	12032	255.6	4.9
1111.080	12287	250.3	2.9
1111.100	12287	245.0	4.2
1117.970	12470	246.2	2.7
1120.500	12533	246.3	10.6
1130.730	12790	243.3	2.5
1130.800	12792	251.1	10.2
1136.440	12938	236.0	3.2
1140.585	13049	239.4	1.1
1150.000	13312	231.5	5.5
1150.130	13316	242.7	2.7
1151.180	13344	242.7	3.1
1160.400	13592	246.9	3.2
1162.305	13644	242.0	5.5
1166.925	13769	236.1	1.0
1171.325	13889	238.9	2.5
1175.450	14001	240.6	2.4
1181.340	14158	242.8	0.8
1184.265	14236	243.7	1.0
1187.645	14327	246.2	0.8
1192.070	14448	243.9	1.3
1195.810	14546	240.4	3.0
1199.300	14636	233.2	1.3
1200.245	14660	234.2	2.0
1200.500	14667	229.1	2.4
1203.470	14742	235.2	2.3
1205.640	14797	231.1	1.1
1216.325	15073	233.1	1.6
1221.470	15211	225.4	2.0
1226.110	15335	225.3	1.6
1231.875	15489	231.4	0.9
1239.685	15693	233.5	3.0
1247.850	15896	218.8	3.2
1251.000	15977	214.8	6.0
1251.160	15982	219.1	0.8
1252.040	16004	223.5	3.6
1254.125	16060	214.8	1.6
1254.940	16083	211.8	1.5
1260.900	16250	211.7	1.0
1261.000	16254	209.2	1.5
1265.000	16398	209.3	2.1
1270.670	16609	205.9	2.1
1276.200	16816	192.4	1.5
1286.370	17193	199.9	2.5
1287.880	17246	201.1	0.5
1291.695	17391	201.9	2.1
1304.230	17907	195.6	2.1
1309.680	18124	188.1	1.9
1314.180	18302	194.4	0.8
1316.000	18374	193.7	2.1
1319.640	18518	195.3	2.1
1329.300	18884	196.4	1.5
1335.030	19090	192.1	2.1
1341.450	19334	197.1	2.1
1344.330	19451	194.6	2.1
1347.000	19559	196.5	4.2
1348.400	19615	198.8	2.1
1351.840	19753	200.5	2.1
1354.070	19840	195.7	2.1
1359.990	20071	199.4	2.1
1365.480	20289	195.3	2.1
1368.560	20413	194.9	2.1
1374.355	20650	186.7	2.1
1382.950	21007	205.6	2.4
1387.800	21211	204.7	1.5
1392.800	21421	195.8	2.1
1395.370	21529	198.3	1.5
1408.220	22060	194.1	2.1
1414.000	22298	199.2	1.5
1425.860	22780	186.7	2.1
1440.000	23327	203.2	2.1
1440.930	23366	203.5	2.1
1451.200	23773	190.2	1.5
1456.400	23978	192.3	2.1
1466.880	24389	185.8	1.5
1476.990	24794	186.3	2.1
1481.500	24975	194.7	1.5
1484.500	25107	186.7	4.2
1486.000	25172	197.9	2.1
1492.220	25424	199.6	2.7
1496.400	25589	202.6	2.6
1498.000	25654	194.1	4.2
1499.600	25718	187.0	4.5
1501.000	25773	194.4	4.2
1502.800	25846	193.5	4.2
1504.000	25894	183.0	4.5
1507.000	26008	195.3	4.0
1508.600	26067	202.0	4.5
1510.000	26117	193.5	4.2
1511.000	26153	195.7	3.5
1511.500	26171	187.4	4.2
1512.500	26209	195.4	3.5
1514.600	26290	180.3	5.0
1515.800	26339	186.2	3.5
1520.700	26568	197.8	4.2
1523.700	26725	194.3	4.2
1525.200	26800	196.0	4.2
1528.200	26946	193.5	4.2
1529.600	27011	193.8	4.2
1530.800	27067	189.8	5.0
1532.300	27137	189.0	4.2
1533.900	27210	181.3	4.0
1540.000	27498	192.2	2.4
1544.000	27691	202.0	15.3
1546.000	27788	186.5	2.1
1549.000	27928	186.8	2.1
1552.000	28069	187.6	10.6
1556.000	28257	194.4	3.0
1558.000	28351	188.1	2.1
1562.000	28541	189.4	2.1
1564.000	28636	188.4	2.5
1568.000	28813	190.0	3.0
1570.000	28902	189.2	3.3
1573.000	29038	187.0	3.5
1579.000	29321	188.0	3.0
1582.900	29516	198.9	4.0
1585.000	29621	195.5	4.0
1588.900	29811	197.5	2.8
1591.400	29930	201.9	2.8
1594.400	30073	192.0	4.0
1597.200	30206	196.8	3.1
1600.000	30333	189.9	4.2
1604.000	30514	197.7	1.5
1606.000	30610	188.6	7.0
1610.000	30800	194.5	2.1
1611.300	30864	200.6	4.0
1614.300	31010	202.1	4.0
1617.300	31150	199.7	4.0
1620.000	31277	189.5	2.1
1624.000	31457	195.7	2.1
1627.000	31592	198.4	3.3
1629.000	31682	199.8	2.1
1632.000	31816	199.0	2.8
1636.000	32005	192.1	8.5
1639.000	32147	203.1	2.1
1641.000	32246	199.0	5.9
1645.000	32443	202.4	2.1
1648.000	32591	207.4	2.1
1651.500	32772	191.5	4.0
1653.000	32849	209.4	2.1
1657.000	33042	199.2	7.9
1666.000	33447	206.4	2.4
1676.000	33906	199.3	9.8
1679.000	34049	202.6	2.1
1682.000	34192	201.8	2.9
1684.000	34290	202.7	4.9
1686.000	34389	203.9	2.1
1691.000	34636	209.4	3.5
1694.000	34786	207.8	2.1
1696.000	34887	209.5	2.1
1699.000	35037	205.8	1.9
1714.500	35780	208.6	4.2
1715.900	35843	203.1	1.3
1717.200	35903	203.6	4.2
1718.800	35978	197.0	4.4
1720.000	36034	196.8	3.5
1723.400	36192	199.8	3.5
1724.900	36261	199.9	3.5
1725.600	36294	192.6	3.5
1726.600	36341	187.8	4.2
1727.440	36380	198.6	2.8
1728.300	36419	195.5	5.2
1729.000	36451	195.9	7.1
1729.500	36474	200.0	3.5
1730.800	36534	191.4	2.7
1732.500	36614	201.1	3.5
1734.500	36703	196.8	3.5
1735.500	36747	199.4	4.2
1736.200	36777	202.3	4.2
1738.400	36875	198.6	4.2
1739.700	36931	207.4	4.2
1741.400	37004	204.0	4.2
1742.900	37070	210.9	3.6
1743.500	37097	207.0	5.0
1744.165	37127	201.5	3.2
1744.665	37149	201.9	3.5
1745.275	37176	202.5	2.5
1746.000	37209	195.0	4.2
1747.400	37271	193.1	4.2
1748.700	37332	195.6	4.2
1750.200	37403	194.8	4.2
1751.700	37472	194.4	4.2
1754.200	37591	196.2	2.0
1756.200	37688	195.4	1.8
1759.000	37823	191.4	2.7
1763.000	38014	193.3	2.1
1765.000	38108	197.6	3.9
1772.900	38491	193.7	4.0
1774.600	38577	193.6	4.0
1777.800	38800	197.5	4.0
1780.700	39034	196.9	4.0
1788.000	39613	194.9	4.0
1789.500	39734	194.9	4.0
1801.000	40691	194.3	9.1
1813.600	41675	197.8	4.0
1820.000	42200	197.5	2.8
1822.500	42417	201.5	2.8
1826.800	42701	202.8	4.0
1828.600	42796	200.2	4.0
1831.700	42970	201.2	4.0
1835.900	43222	207.1	4.0
1837.700	43330	210.0	4.0
1841.900	43580	208.1	4.0
1843.700	43691	209.9	4.0
1847.900	43953	212.3	3.9
1850.000	44079	204.6	6.3
1850.800	44127	202.9	4.0
1855.700	44420	211.4	5.4
1858.200	44565	206.5	2.8
1861.700	44758	204.5	4.0
1864.600	44914	210.5	4.0
1867.700	45081	206.5	4.0
1871.000	45264	202.4	4.0
1873.900	45423	204.6	4.0
1881.000	45808	199.9	4.0
1884.000	45971	200.7	4.0
1891.900	46417	202.8	4.0