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  • 2020-2024  (19)
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  • 1
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    Global mean surface temperature and climate sensitivity of the early Eocene Climatic Optimum (EECO), Paleocene–Eocene Thermal Maximum (PETM), and latest Paleocene (2020)
    Copernicus Publications (EGU)
    Details
    Publication Date: 2023-02-08
    Description: Accurate estimates of past global mean surface temperature (GMST) help to contextualise future climate change and are required to estimate the sensitivity of the climate system to CO2 forcing through Earth's history. Previous GMST estimates for the latest Paleocene and early Eocene (∼57 to 48 million years ago) span a wide range (∼9 to 23 ∘C higher than pre-industrial) and prevent an accurate assessment of climate sensitivity during this extreme greenhouse climate interval. Using the most recent data compilations, we employ a multi-method experimental framework to calculate GMST during the three DeepMIP target intervals: (1) the latest Paleocene (∼57 Ma), (2) the Paleocene–Eocene Thermal Maximum (PETM; 56 Ma), and (3) the early Eocene Climatic Optimum (EECO; 53.3 to 49.1 Ma). Using six different methodologies, we find that the average GMST estimate (66 % confidence) during the latest Paleocene, PETM, and EECO was 26.3 ∘C (22.3 to 28.3 ∘C), 31.6 ∘C (27.2 to 34.5 ∘C), and 27.0 ∘C (23.2 to 29.7 ∘C), respectively. GMST estimates from the EECO are ∼10 to 16 ∘C warmer than pre-industrial, higher than the estimate given by the Intergovernmental Panel on Climate Change (IPCC) 5th Assessment Report (9 to 14 ∘C higher than pre-industrial). Leveraging the large “signal” associated with these extreme warm climates, we combine estimates of GMST and CO2 from the latest Paleocene, PETM, and EECO to calculate gross estimates of the average climate sensitivity between the early Paleogene and today. We demonstrate that “bulk” equilibrium climate sensitivity (ECS; 66 % confidence) during the latest Paleocene, PETM, and EECO is 4.5 ∘C (2.4 to 6.8 ∘C), 3.6 ∘C (2.3 to 4.7 ∘C), and 3.1 ∘C (1.8 to 4.4 ∘C) per doubling of CO2. These values are generally similar to those assessed by the IPCC (1.5 to 4.5 ∘C per doubling CO2) but appear incompatible with low ECS values (〈1.5 per doubling CO2).
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Geochemistry of the CAU core (drilled 2015-2017): C and O isotopes, TOC and CaCO3 - Aptian - Betic Cordillera, Alicante, Spain (2020)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: A high-resolution carbonate C-isotope (δ13Ccarb) stratigraphy for the Aptian is presented for the Cau core from Alicante, Spain. The studied succession, lower to upper Aptian, embraces the record of the Early Aptian OAE 1a. The data provided includes δ13Ccarb, δ18O isotopes, Total Organic Carbon (TOC) and CaCO3. Four overlapping cores (D1 to D4) were drilled with an almost 100% recovery of a total (corrected for dip) thickness of 143 m. The cores were split in two parts. One half was described, photographed and scanned, and then sampled with a drill to obtain powdered samples for geochemical analyses. Also, small solid samples were taken from the drill for biostratigraphic characterization of the nannofossil and planktonic foraminifera associations. Second half was stored for archive and future research.
    Keywords: Almadich formation; Aptian; Automatic calcimeter (DREAM Électronique SAS , Pessac, France); Calcium carbonate; C and O isotopes; Carbon, organic, total; Cau_Core-D1; Cau_Core-D2; Cau_Core-D3; Cau_Core-D4; Cau-core; CO3Ca; DEPTH, sediment/rock; Event label; Hemipelagic sedimentation; Mass spectrometer, Finnigan, MAT 253; coupled with Carbonate preparation device, Finnigan, KIEL IV; OAE 1a; RDC; Rock drill core; Sample ID; Shimadzu TOC-V CSH total organic carbon analyzer; TOC; δ13C; δ18O
    Type: Dataset
    Format: text/tab-separated-values, 3121 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Averaged isoGDGT isomers in global database of wetlands (2020)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: This is the archaeal biomarker dataset for global peatlands. The first dataset contains biomarker data for each individual sample as for many peatlands we analysed more than one sample. The second dataset contains the averaged data for isoGDGT isomers in all sites that contains both associated pH and temperature measurements.
    Keywords: Archaea; Area/locality; BDGTs; biogeochemistry; Country; crenarchaeol; ELEVATION; GDGTs; Index; isomers; Isoprenoid glycerol dialkyl glycerol tetraether; LATITUDE; LONGITUDE; Me-GDGTs; pH; Temperature; Temperature, annual mean; wetlands
    Type: Dataset
    Format: text/tab-separated-values, 825 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Global distribution of archaeal biomarkers in wetlands (2020)
    PANGAEA
    Details
    Publication Date: 2023-03-14
    Description: This is the archaeal GDGT dataset for global peatlands. The first dataset contains biomarker data for each individual sample as for many peatlands we analysed more than one sample. The second dataset contains the averaged data for isoGDGT isomers in all sites that contains both associated pH and temperature measurements. Other biomarker data for these samples can be found here: https://doi.pangaea.de/10.1594/PANGAEA.883763
    Keywords: Archaea; Area/locality; BDGTs; biogeochemistry; Country; crenarchaeol; Crenarchaeol, fractional abundance; Crenarchaeol (peak area); Crenarchaeol isomer, fractional abundance; Crenarchaeol isomer (peak area); Depth, description; GDGTs; Index; isomers; Isoprenoid acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Isoprenoid dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; Isoprenoid glycerol dialkyl glycerol tetraether, 5, fractional abundance; Isoprenoid glycerol dialkyl glycerol tetraether, 5 (peak area); Isoprenoid monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; Isoprenoid tricyclic glycerol dialkyl glycerol tetraether, fractional abundance; Me-GDGTs; pH; pH, standard deviation; Temperature; Temperature, annual mean; Temperature, coldest month; Temperature, warmest month; wetlands
    Type: Dataset
    Format: text/tab-separated-values, 9870 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Boron isotope, Mg/Ca, Al/Ca data and reconstructed pH and CO2 concentrations from IODP sites (2020)
    PANGAEA
    Details
    Publication Date: 2023-09-25
    Description: This dataset includes measurements on mixed layer planktonic foraminifera from IODP/ODP sites for boron isotopes and trace elements. Boron isotopes were measured after column chemistry and solution analyses on a Neptune multi collector ICPMS, while trace elements were measured on pre-columned aliquots of the same samples, using Element XR ICP-MS. Furthermore, the dataset includes the seawater pH and atmospheric CO2 calculated from B isotopes measurements and Mg/Ca-temperature estimates, for no-vital effect treatment (T. sac-vital effect corrections at Eocene d11Bsw conditions result in d11B offsets within analytical uncertainty), and no pH correction on Mg/Ca-temperature relationship (assuming T. sac like species). Carbonate system calculations incorporate MyAMI ion-pairing corrections (https://github.com/MathisHain/MyAMI), and surface Omega values specific for the Eocene and the paleo-latitude of the core location. Propagation of uncertainties for pH and CO2 is completed through 1000 Monte Carlo simulations.
    Keywords: 143-865B; 207-1258A; 207-1258B; 207-1258C; 207-1260A; 342-U1407A; 342-U1409B; 342-U1409C; AGE; Aluminium/Calcium ratio; Atmospheric CO2; Carbon dioxide; Carbon dioxide, standard deviation; climate sensitivity; Comment; Core; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Eocene; Event label; Exp342; Foraminifera, planktic δ11B; GMT; Hole; Joides Resolution; Leg143; Leg207; Magnesium/Calcium ratio; North Pacific Ocean; Paleogene Newfoundland Sediment Drifts; pH; pH, standard deviation; Sea surface temperature; Section; Site; Size fraction; South Atlantic Ocean; Species; surface seawater pH; δ11B, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1239 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Biomarker distributions and proxies at Cobham, UK (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-11
    Keywords: Acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Acyclic glycerol dialkyl glycerol tetraether (peak intensity); Age, comment; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether; Branched glycerol dialkyl glycerol tetraether, Ia, fractional abundance; Branched glycerol dialkyl glycerol tetraether, Ia (peak area); Branched glycerol dialkyl glycerol tetraether, Ib, fractional abundance; Branched glycerol dialkyl glycerol tetraether, Ib (peak area); Branched glycerol dialkyl glycerol tetraether, Ic, fractional abundance; Branched glycerol dialkyl glycerol tetraether, Ic (peak area); Branched glycerol dialkyl glycerol tetraether, IIa, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIa', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIa' (peak area); Branched glycerol dialkyl glycerol tetraether, IIa (peak area); Branched glycerol dialkyl glycerol tetraether, IIb, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIb', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIb' (peak area); Branched glycerol dialkyl glycerol tetraether, IIb (peak area); Branched glycerol dialkyl glycerol tetraether, IIc, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIc', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIc' (peak area); Branched glycerol dialkyl glycerol tetraether, IIc (peak area); Branched glycerol dialkyl glycerol tetraether, IIIa, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIa', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIa' (peak area); Branched glycerol dialkyl glycerol tetraether, IIIa (peak area); Branched glycerol dialkyl glycerol tetraether, IIIb, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIb', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIb' (peak area); Branched glycerol dialkyl glycerol tetraether, IIIb (peak area); Branched glycerol dialkyl glycerol tetraether, IIIc, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIc', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIc' (peak area); Branched glycerol dialkyl glycerol tetraether, IIIc (peak area); Branched glycerol monoalkyl glycerol tetraethers, Ia (peak area); Branched glycerol monoalkyl glycerol tetraethers, IIa (peak area); Branched glycerol monoalkyl glycerol tetraethers, IIIa (peak area); Cobham; Comment; Crenarchaeol, fractional abundance; Crenarchaeol (peak area); Degree of cyclisation; DEPTH, sediment/rock; Dicyclic glycerol dialkyl glycerol tetraether, fractional abundance; Dicyclic glycerol dialkyl glycerol tetraether (peak area); Glycerol dialkyl glycerol tetraether 5 (peak area); Glycerol monoalkyl glycerol tetraether lipids; Glycerol monoalkyl glycerol tetraether lipids (peak area); H-Glycerol dialkyl glycerol tetraether (peak area); Isoprenoid glycerol dialkyl glycerol tetraether, 5; lignite; Lithology/composition/facies; Methylation index of branched tetraethers; Monocyclic glycerol dialkyl glycerol tetraether, fractional abundance; Monocyclic glycerol dialkyl glycerol tetraether (peak area); pH; Proxy; QU; Quarry; Sample code/label; Tetracyclic glycerol dialkyl glycerol tetraether, fractional abundance; Tetracyclic glycerol dialkyl glycerol tetraether (peak area); Tricyclic glycerol dialkyl glycerol tetraether, fractional abundance; Tricyclic glycerol dialkyl glycerol tetraether (peak area)
    Type: Dataset
    Format: text/tab-separated-values, 2155 data points
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    DATA PANGAEA
  • 7
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    Model-derived mean annual surface temperature and precipitation estimates as a function of CO2 at Cobham (UK) (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-11
    Keywords: lignite
    Type: Dataset
    Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 16.9 kBytes
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    DATA PANGAEA
  • 8
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    Middle Eocene to early Oligocene SST record of DSDP Hole 29-277 (2021)
    PANGAEA
    Details
    Publication Date: 2023-10-16
    Keywords: 29-277; AGE; Antarctic Ocean/PLATEAU; Australia; Biomarkers; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Eocene-Oligocene Transition; Glomar Challenger; Leg29; paleotemperature; Reference/source; Sea surface temperature; SST, from BAYSPAR (50th Percentile); SST, from BAYSPAR (5th Percentile); SST, from BAYSPAR (95th Percentile); terrestrial temperatures; Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 60 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Middle Eocene to early Oligocene SST record of DSDP Hole 71-511 (2021)
    PANGAEA
    Details
    Publication Date: 2023-10-16
    Keywords: 71-511; AGE; Australia; Biomarkers; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Eocene-Oligocene Transition; Glomar Challenger; Leg71; paleotemperature; Reference/source; Sea surface temperature; South Atlantic/PLATEAU; SST, from BAYSPAR (50th Percentile); SST, from BAYSPAR (5th Percentile); SST, from BAYSPAR (95th Percentile); terrestrial temperatures; Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 260 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Middle Eocene to early Oligocene biomarker data and TOC% from SE Australia (2021)
    PANGAEA
    Details
    Publication Date: 2023-10-16
    Keywords: Anglesea_mine; Australia; Biomarkers; Biozone; Branched and isoprenoid tetraether index; Carbon, organic, total; CDRILL; Core drilling; DEPTH, sediment/rock; Eocene-Oligocene Transition; Epoch; Event label; Gippsland Basin, Australia; Methylation index of 5-methyl branched glycerol dialkyl glycerol tetraether; Name; paleotemperature; pH; Ratio; Sample code/label; Sample code/label 2; Temperature, air, annual mean; terrestrial temperatures; Torquay Basin, Australia; Wulla_Wullock-7
    Type: Dataset
    Format: text/tab-separated-values, 608 data points
    Location Call Number Limitation Availability
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