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Hoogakker, Babette A A; Rohling, Eelco J; Palmer, Martin R; Tyrrell, Toby; Rothwell, Robin Guy (2006): 1.2 Ma stacked benthic foraminiferal carbon isotope record [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.856552, Supplement to: Hoogakker, BAA et al. (2006): Underlying causes for long-term global ocean d13C fluctuations over the last 1.20 Myr. Earth and Planetary Science Letters, 248(1-2), 15-29, https://doi.org/10.1016/j.epsl.2006.05.007

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Abstract:
Pleistocene stable carbon isotope (d13C) records from surface and deep dwelling foraminifera in all major ocean basins show two distinct long-term carbon isotope fluctuations since 1.00 Ma. The first started around 1.00 Ma and was characterised by a 0.35 per mil decrease in d13C values until 0.90 Ma, followed by an increase of 0.60 per mil lasting until 0.50 Ma. The subsequent fluctuation started with a 0.40 per mil decrease between 0.50 and 0.25 Ma, followed by an increase of 0.30 per mil between 0.25 and 0.10 Ma. Here, we evaluate existing evidence and various hypotheses for these global Pleistocene d13C fluctuations and present an interpretation, where the fluctuations most likely resulted from concomitant changes in the burial fluxes of organic and inorganic carbon due to ventilation changes and/or changes in the production and export ratio. Our model indicates that to satisfy the long-term 'stability' of the Pleistocene lysocline, the ratio between the amounts of change in the organic and inorganic carbon burial fluxes would have to be close to a 1:1 ratio, as deviations from this ratio would lead to sizable variations in the depth of the lysocline. It is then apparent that the mid-Pleistocene climate transition, which, apart from the glacial cycles, represents the most fundamental change in the Pleistocene climate, was likely not associated with a fundamental change in atmospheric pCO2. While recognising that high frequency glacial/interglacial cycles are associated with relatively large (100 ppmv) changes in pCO2, our model scenario (with burial changes close to a 1:1 ratio) produces a maximum long-term variability of only 20 ppmv over the fluctuation between 1.00 and 0.50 Ma.
Related to:
Chen, Jiajie; Farrell, John W; Murray, David W; Prell, Warren L (1995): (Table 1) Stable oxygen and carbon isotope ratios of Cibicides wuellerstorfi from ODP Site 121-758 in the northeast Indian Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.52683
Chen, Jiajie; Farrell, John W; Murray, David W; Prell, Warren L (1995): Timescale and paleoceanographic implications of a 3.6 m.y. oxygen isotope record from the northeast Indian Ocean (Ocean Drilling Program Site 758). Paleoceanography, 10(1), 21-48, https://doi.org/10.1029/94PA02290
Mix, Alan C; Pisias, Nicklas G; Rugh, W D; Wilson, June; Morey, Ann E; Hagelberg, Teresa King (1995): (Appendix A) Stable carbon and oxygen isotope ratios of benthic foraminifera from ODP Site 138-849 on the East Pacifi Rise [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.60255
Mix, Alan C; Pisias, Nicklas G; Rugh, W D; Wilson, June; Morey, Ann E; Hagelberg, Teresa King (1995): Benthic foraminifer stable isotope record from Site 849 (0-5 Ma): local and global climate changes. In: Pisias, NG; Mayer, LA; Janecek, TR; Palmer-Julson, A; van Andel, TH (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 138, 371-412, https://doi.org/10.2973/odp.proc.sr.138.120.1995
Oppo, Delia W; Raymo, Maureen E; Lohmann, Gerrit; Mix, Alan C; Wright, James D; Prell, Warren L (1995): (Table 2) Stable isotope ratios od Cibicidoides wuellerstorfi from DSDP Site 68-502 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.52693
Oppo, Delia W; Raymo, Maureen E; Lohmann, Gerrit; Mix, Alan C; Wright, James D; Prell, Warren L (1995): A d13C record of Upper North Atlantic Deep Water during the past 2.6 million years. Paleoceanography, 10(3), 373-394, https://doi.org/10.1029/95PA00332
Tiedemann, Ralf; Sarnthein, Michael; Shackleton, Nicholas J (1994): Astronomic timescale for the Pliocene Atlantic d18O and dust flux records of Ocean Drilling Program site 659. Paleoceanography, 9(4), 619-638, https://doi.org/10.1029/94PA00208
Tiedemann, Ralf; Sarnthein, Michael; Shackleton, Nicholas J (1994): Stable oxygen isotope ratios of Cibicidoides wuellerstorfi from ODP Hole 108-659A in the North Atlantic [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.52517
Wang, Pinxian; Tian, Jun; Cheng, Xinrong; Liu, Chuanlian; Xu, Jian (2004): Major Pleistocene stages in a carbon perspective: The South China Sea record and its global comparison. Paleoceanography, 19(4), PA4005, https://doi.org/10.1029/2003PA000991
Comment:
The 1.2 Ma stacked benthic foraminiferal carbon isotope record is created from averaging five 60,000 year smoothed benthic foraminiferal carbon isotope records. We used benthic foraminiferal carbon isotope records of DSDP/ODP Sites 68-502, 108-659, 121-758, 138-849 and 184-1143 from Oppo et al. (1995), Tiedemann et al. (1994), Chen et al. (1995), Mix et al. (1995), and Wang et al. (2004).
The smoothed (and stacked) record show two distinct long-term carbon isotope fluctuations since 1.0 Ma.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
AGEAgeka BPHoogakker, Babette A AGeocode
δ13C, stackedδ13C stack‰ PDBHoogakker, Babette A Afrom Cibicidoides wuellerstorfi
Size:
1192 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Age [ka BP]

δ13C stack [‰ PDB]
60.380
70.380
80.380
90.363
100.362
110.361
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130.358
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220.350
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330.347
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