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  • 1
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    Sea surface and subsurface temperature reconstruction for sediment core V12-107
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AGE; PC; Piston corer; Sea surface temperature, annual mean; Sub-surface temperature; V12; V12-107; Vema
    Type: Dataset
    Format: text/tab-separated-values, 151 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Database of previously published eastern equatorial Pacific δ¹⁸O and δ¹³C of planktic foraminifera records (2018)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 111-677B; 138-846B; 202-1240; 202-1242; 70-506B; AGE; CD38-17P; Cocos Ridge; COMPCORE; Composite Core; DEPTH, sediment/rock; DRILL; Drilling/drill rig; East Pacific; Elevation of event; Equatorial East Pacific; Event label; GC; Giant piston corer; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Globigerina inflata, δ13C; Globigerina inflata, δ18O; Globigerinoides ruber, δ13C; Globigerinoides ruber, δ18O; Globigerinoides sacculifer, δ13C; Globigerinoides sacculifer, δ18O; Globorotalia menardii, δ13C; Globorotalia menardii, δ18O; Globorotalia tumida, δ13C; Globorotalia tumida, δ18O; Glomar Challenger; GPC; Gravity corer; IMAGES VIII - MONA; Joides Resolution; Latitude of event; Leg111; Leg138; Leg202; Leg70; Longitude of event; Marion Dufresne (1995); MD022529; MD02-2529; MD126; ME0005A; ME0005A-43JC; Melville; NEMO; Neogloboquadrina dutertrei, δ13C; Neogloboquadrina dutertrei, δ18O; North Pacific/MOUND; North Pacific Ocean; PC; Piston corer; RC08; RC08-102; RC11; RC1112; RC11-238; RC13; RC13-140; Reference/source; Robert Conrad; South Pacific Ocean; TR163-11; TR163-19; TR163-31; TR163-33; TR163-38; V19; V19-27; V19-28; V19-30; V21; V21-29; V21-30; V21-40; Vema; Y69-71P; YALOC69; Yaquina
    Type: Dataset
    Format: text/tab-separated-values, 14775 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Eastern Equatorial Pacific Holocene and Last Glacial Maximum stable isotopes (δ¹⁸O and δ¹³C) of planktic foraminifera and calculated gradients (2018)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 111-677B; 138-846B; 138-849B; 202-1240; 202-1242; 70-506B; Calculated; Carnegie_09MC-17JC; CD38-17P; Central Equatorial North Pacific; Central Equatorial South Pacific; Cocos_07MC-08JC; Cocos Ridge; COMPCORE; Composite Core; DRILL; Drilling/drill rig; East Pacific; Elevation of event; Equatorial East Pacific; Event label; GC; Giant piston corer; Globigerinoides ruber, δ18O; Globigerinoides sacculifer, δ18O; Globorotalia tumida, δ18O; Glomar Challenger; GPC; Gravity corer; IMAGES VIII - MONA; Joides Resolution; JPC; Jumbo Piston Core; Latitude of event; Leg111; Leg138; Leg202; Leg70; Longitude of event; Marion Dufresne (1995); MD022529; MD02-2529; MD126; ME0005A; ME0005A-43JC; Melville; NEMO; Neogloboquadrina dutertrei, δ18O; North Pacific/MOUND; North Pacific Ocean; PC; Piston corer; RC08; RC08-102; RC11; RC1112; RC11-238; RC13; RC13-140; Reference/source; Robert Conrad; South Pacific Ocean; TR163-11; TR163-19; TR163-31; TR163-33; TR163-38; V19; V19-27; V19-28; V19-30; V21; V21-29; V21-30; V21-40; Vema; Y69-71P; YALOC69; Yaquina; δ18O
    Type: Dataset
    Format: text/tab-separated-values, 166 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Oxygen Stable Isotope Values from the Holocene and Last Glacial Maximum in the Eastern Equatorial Pacific (2018)
    PANGAEA
    In:  Supplement to: Ford, Heather L; McChesney, C Lorriane; Hertzberg, Jennifer E; McManus, Jerry F (2018): A Deep Eastern Equatorial Pacific Thermocline During the Last Glacial Maximum. Geophysical Research Letters, https://doi.org/10.1029/2018GL079710
    Details
    Publication Date: 2024-03-02
    Description: The mean state and variability of the tropical Pacific is influenced by the depth of the thermocline. During the Last Glacial Maximum (~21,000 years ago), the zonal sea surface temperature gradient across the equatorial Pacific was reduced and productivity was lower than modern. To understand the thermocline depth's role in determining the Last Glacial Maximum tropical mean state, here we reconstruct the upper ocean d18O profile from multiple species of planktic foraminifera. We synthesize existing records of surface and subsurface dwelling foraminifera to reconstruct the vertical d18O gradient throughout the eastern equatorial Pacific. We find the thermocline was deeper during the Last Glacial Maximum than the Holocene throughout the eastern equatorial region. The thermocline depth's role in the dynamic forcing of the cold tongue contributed to the reduced zonal SST gradient across the equatorial Pacific, decreased productivity and reduced El Niño-Southern Oscillation variability relative to the Holocene.
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Stable isotopes δ¹⁸O and δ¹³C obtained on multiple species of planktic foraminifera (2018)
    PANGAEA
    Details
    Publication Date: 2024-03-02
    Keywords: 138-849B; AGE; Carnegie_09MC-17JC; Central Equatorial North Pacific; Central Equatorial South Pacific; Cocos_07MC-08JC; DRILL; Drilling/drill rig; Elevation of event; Event label; Globigerina inflata, δ13C; Globigerina inflata, δ18O; Globigerinoides ruber, δ13C; Globigerinoides ruber, δ18O; Globigerinoides sacculifer, δ13C; Globigerinoides sacculifer, δ18O; Globorotalia menardii, δ13C; Globorotalia menardii, δ18O; Globorotalia tumida, δ13C; Globorotalia tumida, δ18O; Joides Resolution; JPC; Jumbo Piston Core; Latitude of event; Leg138; Longitude of event; Neogloboquadrina dutertrei, δ13C; Neogloboquadrina dutertrei, δ18O; North Pacific Ocean; Pulleniatina obliquiloculata, δ13C; Pulleniatina obliquiloculata, δ18O; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 115 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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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
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Dynamic carbonate sedimentation on the Northern Line Islands Ridge, Palmyra Basin (2016)
    Elsevier
    In:  Marine Geology, 379 . pp. 194-207.
    Details
    Publication Date: 2019-02-01
    Description: The Line Islands Ridge (LIR), located south of the Hawaiian Islands between 7°N and 1°S, is one of the few large central Pacific regions shallower than the regional carbonate compensation depth. Thick sequences of carbonate sediments have accumulated around the LIR despite it being located in the sediment-starved central tropical Pacific. The LIR is an important source of carbonates to the surrounding region and deposition around the LIR has expanded the equatorial Pacific carbonate sediment tongue by about 5% of its total area. Furthermore, sediments on the ridge are potentially important paleoceanographic archives. A recent survey at the crest of the LIR finds evidence for high current activity, significant erosion, but overall net sediment deposition. Currents are strong enough to form sediment waves and lee drifts in the Palmyra Basin, at the northern terminus of the LIR. Sediments along the LIR are pelagic foraminiferal sands that are easily eroded and flow out into the surrounding abyssal plain in active submarine channel systems. As channels migrate, pelagic sediments fill in the abandoned channel arms. Despite significant sediment losses from the top of the ridge, 1.3 km of sediment has accumulated in the upper Palmyra Basin over basement formed 68 to 85 million years ago (Ma). Late Neogene erosion may be more extensive than earlier erosion cycles, in response to reduced sediment production as the Palmyra Basin exited the high productivity equatorial latitudes. Sediments with good stratigraphic order needed for paleoceanographic study are limited in this dynamic sedimentary environment, but can be found with proper survey.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.margeo.2016.06.005
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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