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  • 202-1240; COMPCORE; Composite Core; Equatorial East Pacific; Joides Resolution; Leg202; Ocean Drilling Program; ODP  (1)
  • 8.2 ka event; Accumulation rate, biogenic silica per year; Accumulation rate per year; After Mortlock and Froelich (1981); biogenic opal; DEPTH, sediment/rock; GC; Gravity corer; Holocene; Labrador Sea; Labrador Shelf; Maria S. Merian; MSM45; MSM45_418-2; MSM45-19-2; Opal, biogenic silica; primary production  (1)
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  • 1
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    Planktic foraminiferal abundance and faunal-derived sea surface temperature of eastern equatorial Pacific ODP Site 202-1240 (2012)
    PANGAEA
    In:  Supplement to: Yu, Pai-Sen; Kienast, Markus; Chen, Min-Te; Cacho, Isabel; Flores, José-Abel; Mohtadi, Mahyar; Mix, Alan C (2012): Influences of extratropical water masses on equatorial Pacific cold tongue variability during the past 160 ka as revealed by faunal evidence of planktic foraminifers. Journal of Quaternary Science, 27(9), 921-931, https://doi.org/10.1002/jqs.2582
    Details
    Publication Date: 2024-01-09
    Description: Glacial cooling (~1-5°C) in the eastern equatorial Pacific (EEP) cold tongue is often attributed to increased equatorial upwelling, stronger advection from the Peru-Chile Current (PCC), and to the more remote subpolar southeastern Pacific water mass. However, evidence is scarce for identifying unambiguously which process plays a more important role in driving the large glacial cooling in the EEP. To address this question, here we adopt a faunal calibration approach using planktic foraminifers with a new compilation of coretop data from the eastern Pacific, and present new downcore variation data of fauna assemblage and estimated sea surface temperatures (SSTs) for the past 160 ka (Marine Isotope Stage (MIS) 6) from ODP Site 1240 in the EEP. With significant improvement achieved by adding more coretop data from the eastern boundary current, our downcore calibration results indicate that most of the glacial cooling episodes over the past 160 ka in the EEP are attributable to increased influence from the subpolar water mass from high latitudes of the southern Pacific. By applying this new calibration of the fauna SST transfer function to a latitudinal transect of eastern Pacific (EP) cores, we find that the subpolar water mass has been a major dynamic contributor to EEP cold tongue cooling since MIS 6.
    Keywords: 202-1240; COMPCORE; Composite Core; Equatorial East Pacific; Joides Resolution; Leg202; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Biogenic opal record of gravity core MSM45_19-2 (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-21
    Description: Biogenic opal (BSi) concentrations were analysed as indicator for past primary productivity on gravity core MSM45_19-2 from the northern Labrador Shelf. Gravity core MSM45_19-2 was obtained during R/V Maria S. Merian expedition MSM45 (58°45.68'N, 61°56.25'W, water depth: 202 m) in 2015 (Schneider et al., 2016). Biogenic opal was determined at Dalhousie University following the method of (Mortlock and Froelich , 1989). Briefly, amorphous silica was extracted from ca. 20 mg subsamples using a 2 M Na2 CO3 solution at 85°C for 5 h, followed by the measurement of dissolved silica concentrations by molybdenum blue spectrophotometry.
    Keywords: 8.2 ka event; Accumulation rate, biogenic silica per year; Accumulation rate per year; After Mortlock and Froelich (1981); biogenic opal; DEPTH, sediment/rock; GC; Gravity corer; Holocene; Labrador Sea; Labrador Shelf; Maria S. Merian; MSM45; MSM45_418-2; MSM45-19-2; Opal, biogenic silica; primary production
    Type: Dataset
    Format: text/tab-separated-values, 655 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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