Byrd and Siple Dome 9-21 ka CO2 data on GICC05 Timescale
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World Data Center for Paleoclimatology, Boulder
and
NOAA Paleoclimatology Program
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NOTE: Please cite original reference when using these data,
plus the data file URL and date accessed.
NAME OF DATA SET:
Byrd and Siple Dome 9-21 ka CO2 data on GICC05 Timescale
LAST UPDATE: 7/2012 (Original receipt by WDC Paleo)
CONTRIBUTORS: Pedro, J.B., S.O. Rasmussen, and T.D. van Ommen
IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2012-117
WDC PALEO CONTRIBUTION SERIES CITATION:
Pedro, J.B., et al. 2012.
Byrd and Siple Dome 9-21 ka CO2 data on GICC05 Timescale.
IGBP PAGES/World Data Center for Paleoclimatology
Data Contribution Series # 2012-117.
NOAA/NCDC Paleoclimatology Program, Boulder CO, USA.
ORIGINAL REFERENCE:
Pedro, J.B., S.O. Rasmussen, and T.D. van Ommen. 2012.
Tightened constraints on the time-lag between Antarctic
temperature and CO2 during the last deglaciation.
Clim. Past, 8, 1213-1221.
www.clim-past.net/8/1213/2012/
doi:10.5194/cp-8-1213-2012
ABSTRACT:
Antarctic ice cores provide clear evidence of a close coupling
between variations in Antarctic temperature and the atmospheric
concentration of CO2 during the glacial/interglacial cycles of
at least the past 800-thousand years. Precise information on
the relative timing of the temperature and CO2 changes can
assist in refining our understanding of the physical processes
involved in this coupling. Here, we focus on the last deglaciation,
19 000 to 11 000 yr before present, during which CO2 concentrations
increased by ~80 parts per million by volume and Antarctic
temperature increased by ~10°C. Utilising a recently developed
proxy for regional Antarctic temperature, derived from five
near-coastal ice cores and two ice core CO2 records with high
dating precision, we show that the increase in CO2 likely lagged
the increase in regional Antarctic temperature by less than 400 yr
and that even a short lead of CO2 over temperature cannot be
excluded. This result, consistent for both CO2 records, implies
a faster coupling between temperature and CO2 than previous
estimates, which had permitted up to millennial-scale lags.
GEOGRAPHIC REGION: Antarctica
PERIOD OF RECORD: 9 - 21 KYrBP
DATA FILE URLS:
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/byrd/byrd-siple2012co2.txt
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/byrd/byrd-siple2012co2.xls
DESCRIPTION:
CO2 data from the Byrd and Siple Dome ice cores placed on
the Greenland Ice Core Chronology 2005 (GICC05) timescale
for 9 - 21 KYrBP.
The regional Antarctic temperature proxy data series
is available elsewhere:
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/antarctica2011iso.txt
The locations and original references for the CO2 data and transfers
to the GICC05 timescale are as follows:
Byrd
Location: 80°01’S 119°31’W
Elevation: 1530 m asl
Reference for transfer to GICC05 timescale: Pedro et al., Clim. Past. 8, 2012.
Reference for CO2 data: (1) Neftel, A., Oeschger, H., Staffelbach, T., and
Nature, 331, 609–611, doi:10.1038/331609a0, 1988.
(2) Staffelbach, T., Stauffer, B., Sigg, A., and Oeschger, H.: CO2
measurements from polar ice cores – More data from different
sites, Tellus B, 43, 91–96, doi:10.1034/j.1600-0889.1991.t01-1-
00003.x, 1991.
Siple Dome
Location: 81° 40'S 148° 49'W
Elevation: 621 m asl
Reference for transfer to GICC05 timescale: Pedro et al., Clim. Past. 8, 2012.
Reference for CO2 data:
Ahn, J., Wahlen, M., Deck, B. L., Brook, E. J., Mayewski,
P. A., Taylor, K. C., and White, J. W. C.: A record of atmospheric
CO2 during the last 40,000 years from the Siple
Dome, Antarctica ice core, J. Geophys. Res., 109, D13305,
doi:10.1029/2003JD004415, 2004.
Byrd Ice Core: 80.01°S , 119.51°W; 1530 m elev.
Siple Dome Ice Core, West Antarctica: 81°40'S, 148°49'W
DATA:
1. Pedro et al. 2012 Byrd Ice Core CO2 data 9 - 21 KYrBP
BYRD CO2 on GICC05
Column 1: Sample centre depth
Column 2: GICC05 centre age (years before 1950 AD)
Column 3: Byrd CO2 (ppmv)
Column 4: Byrd CO2 measurement uncertainty (1 sigma) (ppmv)
Byrd Byrd Byrd Byrd
depth gasAgeGICC05 CO2mean sigma mean
[m] YrsBP1950 [ppmv] [ppmv]
869.80 8664 262.0 4.5
879.80 8801 259.5 6.0
891.00 8963 245.0 6.0
910.00 9239 263.5 12.0
930.40 9551 246.4 8.5
951.30 9851 247.5 16.4
959.00 9962 270.9 6.5
981.40 10290 265.9 5.2
989.50 10416 272.5 7.3
1001.40 10596 285.5 9.1
1009.30 10712 272.5 10.9
1024.78 10942 267.6 4.3
1029.20 11013 276.0 10.0
1029.22 11013 279.5 5.7
1039.80 11177 276.0 4.2
1051.22 11350 271.6 2.2
1051.25 11350 262.4 4.2
1059.81 11483 265.1 2.3
1063.72 11545 269.9 2.8
1069.65 11628 265.0 4.2
1069.72 11629 265.3 2.0
1076.17 11741 261.9 7.2
1079.93 11805 262.5 0.8
1079.95 11805 259.7 4.2
1090.85 11991 258.7 4.2
1098.15 12115 255.0 17.3
1098.21 12116 255.6 4.9
1111.33 12403 250.3 2.9
1111.35 12404 245.0 4.2
1118.22 12590 246.2 2.7
1120.75 12650 246.3 10.6
1130.98 12913 243.3 2.5
1131.05 12915 251.1 10.2
1136.69 13066 236.0 3.2
1140.84 13164 239.4 1.1
1150.25 13426 231.5 5.5
1150.38 13430 242.7 2.7
1151.43 13459 242.7 3.1
1160.65 13712 246.9 3.2
1162.56 13761 242.0 5.5
1167.18 13882 236.1 1.0
1171.58 13998 238.9 2.5
1175.70 14120 240.6 2.4
1181.59 14271 242.8 0.8
1184.52 14357 243.7 1.0
1187.90 14451 246.2 0.8
1192.32 14571 243.9 1.3
1196.06 14679 240.4 3.0
1199.55 14774 233.2 1.3
1200.50 14804 234.2 2.0
1200.75 14812 229.1 2.4
1203.72 14904 235.2 2.3
1205.89 14985 231.1 1.1
1216.58 15395 233.1 1.6
1221.72 15575 225.4 2.0
1226.36 15757 225.3 1.6
1232.13 15970 231.4 0.9
1239.94 16236 233.5 3.0
1248.10 16571 218.8 3.2
1251.25 16696 214.8 6.0
1251.41 16701 219.1 0.8
1252.29 16733 223.5 3.6
1254.38 16823 214.8 1.6
1255.19 16857 211.8 1.5
1261.15 17104 211.7 1.0
1261.25 17107 209.2 1.5
1265.25 17254 209.3 2.1
1270.92 17451 205.9 2.1
1276.45 17691 192.4 1.5
1286.62 18119 199.9 2.5
1288.13 18181 201.1 0.5
1291.95 18333 201.9 2.1
1304.48 18912 195.6 2.1
1309.93 19180 188.1 1.9
1314.43 19390 194.4 0.8
1316.25 19457 193.7 2.1
1319.89 19604 195.3 2.1
1329.55 19962 196.4 1.5
1335.28 20172 192.1 2.1
1341.70 20376 197.1 2.1
1344.58 20458 194.6 2.1
1347.25 20554 196.5 4.2
1348.65 20614 198.8 2.1
1352.09 20733 200.5 2.1
1354.32 20816 195.7 2.1
1360.24 21010 199.4 2.1
2. Pedro et al. 2012 Byrd Ice Core CO2 data 9 - 21 KYrBP
SIPLE DOME CO2 on GICC05
Prepared 23/07/2012
Column 1: Sample centre depth
Column 2: GICC05 centre age (years before 1950 AD)
Column 3: Siple CO2 (ppmv)
Column 4: Siple CO2 measurement uncertainty (1 sigma) (ppmv)
Siple Siple Siple Siple
depth gas age CO2mean sigma mean
[m] yrs b1950 [ppmv] [ppmv]
523.67 8580 267.7 2.4
540.77 9147 264.4 2.3
556.61 9647 272.2 2.4
570.07 9893 268.3 4.3
570.10 9893 267.9 2.6
570.11 9893 280.4 3.9
585.06 10526 271.4 2.7
595.08 10840 272.9 1.8
596.54 10884 277.4 2.1
596.72 10890 275.1 2.5
604.23 11112 280.8 1.5
611.92 11347 284.5 6.4
615.87 11466 281.8 1.7
620.06 11588 280.8 4.3
624.79 11769 265.7 2.3
626.59 11852 266.1 4.8
628.54 11937 261.5 4.3
631.15 12043 272.1 1.3
632.74 12113 261.5 2.0
634.58 12203 262.1 4.0
637.31 12316 261.9 2.6
639.54 12416 254.0 2.2
641.96 12519 246.9 0.5
648.27 12835 238.3 2.1
652.80 13165 241.5 1.5
659.43 13620 240.3 1.9
664.50 13972 241.7 0.2
665.86 14083 241.5 2.8
669.43 14350 247.2 3.1
670.14 14405 247.8 1.8
671.31 14498 246.8 0.9
674.02 14692 243.7 2.9
677.62 14984 249.6 2.4
680.53 15262 230.7 2.9
684.24 15606 233.0 2.2
687.11 15883 233.3 3.7
690.29 16189 223.8 2.9
694.00 16534 211.5 2.6
694.00 16534 210.5 4.1
696.73 16774 204.8 4.3
700.54 17135 205.9 1.7
703.46 17377 197.2 1.8
706.43 17629 204.7 1.9
708.00 17750 185.7 4.3
711.52 18514 188.9 3.3
711.58 18528 200.0 1.1
714.92 19316 192.9 1.2
718.49 20194 196.5 0.6
722.97 21328 193.2 3.5