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  • PANGAEA  (10)
  • AGU (American Geophysical Union)  (1)
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  • 1
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    Glacial-interglacial changes in central tropical Pacific surface seawater property gradients (2015)
    AGU (American Geophysical Union) | Wiley
    In:  Paleoceanography, 30 (5). pp. 423-438.
    Details
    Publication Date: 2018-09-12
    Description: Much uncertainty exists about the state of the oceanic and atmospheric circulation in the tropical Pacific over the last glacial cycle. Studies have been hampered by the fact that sediment cores suitable for study were concentrated in the western and eastern parts of the tropical Pacific, with little information from the central tropical Pacific. Here we present information from a suite of sediment cores collected from the Line Islands Ridge in the central tropical Pacific, which show sedimentation rates and stratigraphies suitable for paleoceanographic investigations. Based on the radiocarbon and oxygen isotope measurements on the planktonic foraminifera Globigerinoides ruber, we construct preliminary age models for selected cores and show that the gradient in the oxygen isotope ratio of G. ruber between the equator and 8°N is enhanced during glacial stages relative to interglacial stages. This stronger gradient could reflect enhanced equatorial cooling (perhaps reflecting a stronger Walker circulation) or an enhanced salinity gradient (perhaps reflecting increased rainfall in the central tropical Pacific).
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1002/2014PA002746
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Sea Surface Temperature estimates and benthic foraminifera stable isotopes from IODP 1406 over the Oligocene Miocene time interval (2021)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Description: Here, we present a new record of SST for the time interval 30 to 17 Ma derived from the long‐chain alkenone unsaturation ratio uk'37 and TEX 86 at Integrated Ocean Drilling Program Site 1406A in the midlatitude North Atlantic. Results confirm that warm temperatures from 24°C to over 30°C prevailed in midlatitudes in this time and suggest a transition from colder early‐middle Oligocene to warmer average conditions after 24.5 Ma. Complex and temporally varying relationships are observed between North Atlantic SST and benthic δ18O in paired samples. Significant covariation is only observed around the Oligocene‐Miocene transition, coincident with a lower average marine ice extent. These North Atlantic temperature records provide a new context in which to examine the stability of climate and the Antarctic ice sheet during the Oligocene and early Miocene.
    Keywords: 342-U1405A; 342-U1406A; AGE; Alkenone, C37 total (C37:2+C37:3); Alkenone, unsaturation index UK'37; Branched and isoprenoid tetraether index; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Exp342; Foraminifera, benthic δ13C; Foraminifera, benthic δ18O; Helicosphaera spp.; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Paleogene Newfoundland Sediment Drifts; Sample code/label; Sea surface temperature; Size fraction 〉 0.063 mm, sand; Sortable-silt mean; SST, from TEX86, BAYESPARE (Tierney and Tingley, 2015); SST, from UK'37, BAYSPLINE (Tierney and Tingley, 2018); Tetraether index of 86 carbon atoms
    Type: Dataset
    Format: text/tab-separated-values, 585 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Individual foraminifera variability from the western and eastern equatorial Pacific during the Late Holocene and Last Glacial Maximum (2015)
    PANGAEA
    In:  Supplement to: Ford, Heather L; Ravelo, Ana Christina; Polissar, Pratigya J (2015): Reduced El Nino-Southern Oscillation during the Last Glacial Maximum. Science, 347(6219), 255-258, https://doi.org/10.1126/science.1258437
    Details
    Publication Date: 2024-01-09
    Description: El Niño-Southern Oscillation (ENSO) is a major source of global interannual variability, but its response to climate change is uncertain. Paleoclimate records from the Last Glacial Maximum (LGM) provide insight into ENSO behavior when global boundary conditions (ice sheet extent, atmospheric partial pressure of CO2) were different from those today. In this work, we reconstruct LGM temperature variability at equatorial Pacific sites using measurements of individual planktonic foraminifera shells. A deep equatorial thermocline altered the dynamics in the eastern equatorial cold tongue, resulting in reduced ENSO variability during the LGM compared to the Late Holocene. These results suggest that ENSO was not tied directly to the east-west temperature gradient, as previously suggested. Rather, the thermocline of the eastern equatorial Pacific played a decisive role in the ENSO response to LGM climate.
    Keywords: 130-806A; 138-849A; DRILL; Drilling/drill rig; Joides Resolution; Leg130; Leg138; North Pacific Ocean; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    ODP 763A pollen and leaf wax n-alkane compound distributions and isotopes (2019)
    PANGAEA
    In:  Supplement to: Andrae, Jake William; McInerney, Francesca A; Polissar, Pratigya J; Sniderman, J M Kale; Howard, Sian; Hall, Philip Anthony; Phelps, Samuel (2018): Initial expansion of C4 vegetation in Australia during the late Pliocene. Geophysical Research Letters, 45(10), 4831-4840, https://doi.org/10.1029/2018GL077833
    Details
    Publication Date: 2024-01-09
    Description: The data are measurements of leaf wax n-alkane compound abundance and associated metrics of compound distribution, leaf wax n-alkane compound specific carbon isotope measurements, and pollen abundance from sediments of Ocean Drilling Program core 763A from the Exmouth Plateau off north-west Australia. From these data, aspects of late Cenozoic paleovegetation were reconstructed, with a particular focus on the onset of C4 vegetation expansion in the region.
    Keywords: 122-763A; C4 vegetation; Carbon; DRILL; Drilling/drill rig; isotope; Joides Resolution; Leaf wax; Leg122; n-alkane; Ocean Drilling Program; ODP; Pollen; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    (Table S1) Individual Globorotalia tumida temperature values at ODP Hole 138-849A (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 138-849A; Calculated from Mg/Ca ratios (Mohtadi et al. 2011); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Globorotalia tumida, Magnesium/Calcium ratio; Joides Resolution; Leg138; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sample ID; Sub-surface temperature; Timeslice
    Type: Dataset
    Format: text/tab-separated-values, 1075 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    (Table S1) Individual Globigerinoides sacculifer temperature values at ODP Hole 130-806A (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 130-806A; Calculated from Mg/Ca ratios (Anand et al., 2003); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Globigerinoides sacculifer, Magnesium/Calcium ratio; Joides Resolution; Leg130; Magnesium/Calcium ratio, standard deviation; Measured; Mg/Ca correction (Regenberg et al. 2006); North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sample ID; Sea surface temperature; Timeslice
    Type: Dataset
    Format: text/tab-separated-values, 987 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table S1) Individual Globigerinoides sacculifer temperature values at ODP Hole 138-849A (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 138-849A; Calculated from Mg/Ca ratios (Anand et al., 2003); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Globigerinoides sacculifer, Magnesium/Calcium ratio; Joides Resolution; Leg138; Magnesium/Calcium ratio, standard deviation; Measured; Mg/Ca correction (Regenberg et al. 2006); North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sample ID; Sea surface temperature; Timeslice
    Type: Dataset
    Format: text/tab-separated-values, 1134 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    (Table S1) Individual Globorotalia tumida temperature values at ODP Hole 130-806A (2015)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 130-806A; Calculated from Mg/Ca ratios (Mohtadi et al. 2011); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Globorotalia tumida, Magnesium/Calcium ratio; Joides Resolution; Leg130; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label; Sample ID; Sub-surface temperature; Timeslice
    Type: Dataset
    Format: text/tab-separated-values, 715 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Pollen record of ODP Hole 122-763A (2019)
    PANGAEA
    Details
    Publication Date: 2024-03-06
    Keywords: 122-763A; Acacia; AGE; Alternanthera/Gomphrena-type; Asteraceae; Banksia; C4 vegetation; Callitris; Carbon; Caryophyllaceae; Caryophyllales; Casuarinaceae; cf. Amperea; cf. Apiaceae; cf. Guettardites; cf. Hakea; cf. Opercularia; cf. Polypodiaceae; cf. Solanum; cf. Sonneratia; Chenopodicaceae; Combretaceae; Cyatheaceae; Cyperaceae; DEPTH, sediment/rock; Dodonaea; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Eucalyptus/Corymbia; Eucalyptus spathulata-type; Fern spores, trilete; Glischrocaryon; Gonocarpus; Goodeniaceae; Gyrostemonaceae; Hepatic, Cingulatisporites bifurcatus; Indeterminata; Isoetes; isotope; Joides Resolution; Leaf wax; Leg122; Monolete psilate; Muehlenbeckia; Myoporoideae; Myrtaceae; n-alkane; Ocean Drilling Program; ODP; Pimelea; Poaceae; Podocarpus; Pollen; Pollen, monosulcate reticulate; Pollen, total; Proteaceae; Restionaceae/Anarthriaceae; Rutaceae; Sample code/label; Sample ID; Scrophulariaceae; South Indian Ridge, South Indian Ocean; Stylobasium; Trema; Tribulus/Persicaria
    Type: Dataset
    Format: text/tab-separated-values, 588 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Alkane content of ODP Hole 122-763A (2019)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 122-763A; AGE; Age, error; C4 vegetation; Carbon; Carbon Preference Index; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Dry mass; DSDP/ODP/IODP sample designation; isotope; Joides Resolution; Leaf wax; Leg122; n-alkane; n-Alkane C16; n-Alkane C17; n-Alkane C18; n-Alkane C19; n-Alkane C20; n-Alkane C21; n-Alkane C22; n-Alkane C23; n-Alkane C24; n-Alkane C25; n-Alkane C26; n-Alkane C27; n-Alkane C28; n-Alkane C29; n-Alkane C30; n-Alkane C31; n-Alkane C32; n-Alkane C33; n-Alkane C34; n-Alkane C35; Ocean Drilling Program; ODP; Pollen; Ratio; Sample code/label; Sample ID; South Indian Ridge, South Indian Ocean; Sum n-alkanes C25-C35 per unit sediment mass
    Type: Dataset
    Format: text/tab-separated-values, 702 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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