Vostok and Taylor Dome Ice Core in situ 14C Data
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NOAA Paleoclimatology Program
and
World Data Center for Paleoclimatology, Boulder
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!
NAME OF DATA SET: Vostok and Taylor Dome Ice Core in situ 14C Data
LAST UPDATE: 9/2003 (Original Receipt by WDC Paleo)
CONTRIBUTOR: D. Lal, Scripps Institution of Oceanography
IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2003-063
SUGGESTED DATA CITATION: Lal, D., et al., 2003,
Vostok and Taylor Dome Ice Core in situ 14C Data,
IGBP PAGES/World Data Center for Paleoclimatology
Data Contribution Series #2003-063.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.
ORIGINAL REFERENCE: Lal, D., A.J.T. Jull, D.J. Donahue, G.S. Burr,
B. Deck, J. Jouzel and E. Steig, 2001, The record of cosmogenic
in-situ produced 14C in Vostok and Taylor Dome ice samples:
implications to strong role of wind ventilation processes.
J. Geophys. Res. 106 (D23), 31,933-31,941, 2001.
GEOGRAPHIC REGION: Antarctica
PERIOD OF RECORD: 19 KYrBP - present
DESCRIPTION:
In situ 14C data from the Vostok and Taylor Dome Ice Cores.
DATA:
Tables 1-4 from Lal et al. 2001.
Space-delimited ASCII text - best viewed with fixed width font such as courier.
Table 1. Measured 14C concentrations in Vostok ice samples
Depth in meters
Weight of Ice in Kg
Age in years
Measured 14C concentration in atoms/g for CO and CO2
Age and Air corrected 14C concentration in atoms/g for CO and CO2
Total in-situ 14C concentration in atoms/g, corrected for trapped 14C and decay of 14C.
14CO fraction = 14CO/(14CO+14CO2). Refers to age corrected in-situ 14C concentrations.
Measured 14C Corrected 14C
Lab.code Core Depth Weight Age CO CO2 CO CO2 in-situ 14C 14CO fraction
I001 BH5 7 1.53 5 >20ą50 690ą85 >25ą50 685ą85 >710ą100 -----
D3 BH5 10 2.5 190 825ą50 4040ą100 845ą150 2310ą90 3160ą100 0.37ą0.03
I006 BH5 25 2.85 550 35ą25 20ą25 50ą50 0ą50 50ą70 -----
O11 BH5 56 4.4 1,450 80ą10 90ą35 100ą15 80ą60 180ą60 0.56ą0.21
I003 BH7 60 3.55 1,710 >20ą50 560ą30 25ą50 590ą35 615ą60 0.04ą0.01
I005 BH5 70 3.52 2,100 55ą50 505ą35 70ą60 510ą50 580ą80 0.12ą0.02
V112 BH5 112 2.5 3,820 2785ą80 1710ą60 4420ą130 1910ą95 6330ą160 0.70ą0.04
L1 BH5 116 2.5 3,990 1110ą35 2450ą70 1800ą60 3110ą120 4410ą130 0.37ą0.02
L8 35CA7 211 2.47 8,270 255ą25 880ą35 690ą65 1900ą95 2590ą115 0.27ą0.03
O16 35CA7 266 5.38 10,785 405ą35 135ą35 1490ą125 495ą130 1985ą180 0.75ą0.09
I002 35CA3 267 5.03 10,900 465ą35 960ą20 1735ą130 3085ą70 4820ą150 0.36ą0.03
I004 35CA3 297 4.37 14,000 375ą35 1230ą30 2040ą190 4420ą145 6460ą240 0.32ą0.03
L7 35CA3 333 2 14,568 160ą25 550ą45 945ą150 2780ą310 3720ą310 0.25ą0.05
I007 35CA3 396 8.5 19,500 480ą30 20ą30 5070ą105 0ą130 5070ą170 1.0ą0.05
Table 2. Measured 14C concentrations in Taylor Dome ice samples
Depth in meters
Weight of Ice in Kg
Age in years
Measured 14C concentration in atoms/g for CO and CO2
In-situ 14C concentration in atoms/g for CO and CO2, corrected for trapped 14C and decay of 14C.
Total in-situ 14C concentration in atoms/g, corrected for trapped 14C and decay of 14C.
14CO fraction = 14CO/(14CO+14CO2). Refers to age corrected in-situ 14C concentrations.
Measured In-situ 14C
Lab.code Depth Weight Age CO CO2 CO CO2 in-situ 14C 14CO fraction
O7 1.5 - 1.89 5.95 10 100ą10 320ą25 100ą15 300ą35 400ą40 0.25ą0.05
O10 4.0 - 4.3 5.8 80 65ą10 45ą25 65ą20 40ą35 105ą40 0.74ą0.43
L6 30 - 31 3.2 520 2300ą50 15ą45 2445ą50 10ą50 2455ą70 1.0ą0.04
L4 54 - 55 3.65 970 90ą25 10ą55 120ą30 90ą65 210ą70 0.58ą0.23
L3 84 - 85 3 1,650 240ą10 795ą45 295ą10 260ą55 555ą55 0.53ą0.06
O19 251 - 252 3.95 5,530 105ą25 630ą55 205ą50 525ą100 730ą115 0.28ą0.08
O20 200 - 201 2.41 4,220 5ą60 1130ą35 0ą90 1180ą55 1180ą110 < 0.15 (2 s.d)
O22 327 - 328 3.51 8,330 75ą30 600ą60 205ą80 975ą160 1180ą180 0.17ą0.07
O24 355 - 356 2.68 10,688 135ą25 585ą50 495ą60 1410ą155 1905ą165 0.26ą0.04
Table 3. Observed 14C concentration deficiencies in Vostok Ice samples
Depth in meters
Age in years
Total in-situ 14C concentration in atoms/g, age corrected in-situ 14 C concentration.
Accumulation rate in cm/yr
Expected 14C concentration based on 14C production rate at surface of 234 atoms 14C/g ice/y.
Deficiency factor
Lab code Depth Age in-situ 14C Accum Expected 14C Def. factor
I001 7 5 710ą100 2.15 9760 14ą2
D3 10 190 3160ą100 2.14 9810 3.1ą0.10
I006 25 550 50ą70 2.13 9855 -----
O11 56 1,450 180ą60 2.12 9900 55ą20
I003 60 1,710 615ą60 2.12 9900 16ą2
I005 70 2,100 580ą80 2.12 9900 17ą2
V112 112 3,820 6330ą160 2.22 9455 1.5ą0.04
L1 116 3,990 4410ą130 2.2 9540 2.2ą0.06
L8 211 8,270 2590ą115 2.26 9290 3.6ą0.16
O16 266 10,785 1985ą180 1.8 11660 5.9ą0.54
I002 267 10,900 4820ą150 1.8 11660 2.4ą0.08
I004 297 14,000 6460ą240 1.8 11660 1.8ą0.07
L7 333 14,568 3720ą310 1.57 13370 3.6ą0.30
I007 396 19,500 5070ą170 1.3 16150 3.2ą0.11
@Age corrected in-situ 14 C concentration.
#Based on 14C production rate at surface of 234 atoms 14C/g ice/y.
Table 4. Observed 14C concentration deficiencies in Taylor Dome Ice samples
Depth in meters
Age in years
Total in-situ 14C concentration in atoms/g, age corrected in-situ 14 C concentration.
Accumulation rate in cm/yr
Expected 14C concentration based on 14C production rate at surface of 120.3 atoms 14C/g ice/y
Deficiency factor
Lab code Depth Age in-situ 14C Accum Expected 14C Def. factor
O7 1.5 - 1. 10 400ą40 5.35 3925 9.8ą1.0
O10 4.0 - 4. 80 105ą40 5.7 3680 35ą13
L6 30 - 31 520 2455ą70 5.8 3620 1.5ą0.04
L4 54 - 55 970 210ą70 4.93 4260 20ą7
L3 84 - 85 1,650 555ą55 5.55 3780 6.8ą0.7
O19 251 - 25 5,530 730ą115 5 4200 5.8ą1.0
O20 200 - 20 4,220 1180ą110 4.8 4375 3.7ą0.35
O22 327 - 32 8,330 1180ą180 1.48 14180 12ą1.8
O24 355 - 35 10,688 1905ą165 0.835 25140 13ą1.0