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  • 11
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    (S3) Radiochemical data from the sediment box core PVL 10-50 collected from the RV Melville, cruise MV1211 (2019)
    PANGAEA
    Details
    Publikationsdatum: 2023-04-01
    Beschreibung: Boxcore radiochemical data collected from the RV Melville, cruise MV1211.
    Schlagwort(e): BC; Beryllium-7; Beryllium-7, error; bioturbation; Box corer; Caesium-137; Caesium-137, error; California; Cumulative mass; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; geochronology; Lead-210; Lead-210, error; Lead-210 excess; Lead-210 excess, error; MV1211; PVL10-50_BC; sedimentation rate; surface mixed layer; taphonomic active zone; Temporal resolution in benthic assemblages; Thorium-234 excess; Thorium-234 excess, error
    Materialart: Dataset
    Format: text/tab-separated-values, 144 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 12
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    (S3) Radiochemical data from the sediment vibrocore PVL10-50 collected from the RV Melville, cruise MV1211 (2019)
    PANGAEA
    Details
    Publikationsdatum: 2023-04-01
    Beschreibung: Vibrocore radiochemical data collected from the RV Melville, cruise MV1211.
    Schlagwort(e): bioturbation; Caesium-137; Caesium-137, error; California; Core; Cumulative mass; Depth, adjusted/modified; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; geochronology; Lead-210; Lead-210, error; Lead-210 excess; Lead-210 excess, error; MV1211; PVL10-50_VC; sedimentation rate; surface mixed layer; taphonomic active zone; Temporal resolution in benthic assemblages; VC; Vibro corer
    Materialart: Dataset
    Format: text/tab-separated-values, 144 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 13
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    Lead 210, Caesium 137 and grain size of sediment, Carbon 14 and amino acid racemization data of two bivalves from two cores from Palos Verdes Shelf and San Pedro Shelf, California (2019)
    PANGAEA
    In:  Supplement to: Tomasovych, Adam; Kidwell, Susan M; Alexander, Clark R; Kaufman, Darrell S (2019): Millennial‐scale age offsets within fossil assemblages: Result of bioturbation below the taphonomic active zone and out‐of‐phase production. Paleoceanography and Paleoclimatology, https://doi.org/10.1029/2018PA003553
    Details
    Publikationsdatum: 2023-04-01
    Beschreibung: This collection contains: S1. Summary of radiocarbon-calibrated shell ages of Nuculana taphria and Parvilucina tenuisculpta estimated by amino-acid racemization (with 95% confidence intervals), with water depth (m), sampling year, and D/L of Aspartic and Glutamic acids. Both species were collected at PVL10-50 and OC-50 sites (southern California shelf). S2. Radiocarbon and calibrated ages and D/L of Aspartic and Glutamic acids of the nine specimens of N. taphria and seven specimens of P. tenuisculpta and used to calibrate the rate of amino acid racemization, plus information on live-collected specimens. Both species were collected at PVL10-50 and OC-50 sites (southern California shelf). S3. Boxcore and vibracore radiochemical data collected from the RV Melville, cruise MV1211. S4. Sediment grain size data for two boxcores and two vibracores from PVL10-50 and OC-50 sites (southern California shelf). S5. Estimates of shell loss of Parvilucina tenuisculpta and Nuculana taphria from the uppermost seabed increments based on one-phase exponential model (λ) and random-time two-phase exponential model (λ1, λ2, and sequestration τ) in the entire Southern California Bight and at two stations (PVL10-50 and OC-50). AICc refers to the Akaike Information Criterion corrected for small sample size.
    Schlagwort(e): bioturbation; California; geochronology; sedimentation rate; surface mixed layer; taphonomic active zone
    Materialart: Dataset
    Format: application/zip, 11 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 14
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    Amino acid racemization of Neogloboquadrina pachyderma from the Arctic Ocean
    PANGAEA
    In:  Supplement to: Kaufman, Darrell S; Polyak, Leonid; Adler, Ruth E; Channell, James E T; Xuan, Chuang (2008): Dating late Quaternary planktonic foraminifer Neogloboquadrina pachyderma from the Arctic Ocean using amino acid racemization. Paleoceanography, 23(3), PA3224, https://doi.org/10.1029/2008PA001618
    Details
    Publikationsdatum: 2023-05-12
    Beschreibung: The long-term rate of racemization for amino acids preserved in planktonic foraminifera was determined by using independently dated sediment cores from the Arctic Ocean. The racemization rates for aspartic acid (Asp) and glutamic acid (Glu) in the common taxon, Neogloboquadrina pachyderma, were calibrated for the last 150 ka using 14C ages and the emerging Quaternary chronostratigraphy of Arctic Ocean sediments. An analysis of errors indicates realistic age uncertainties of about ±12% for Asp and ±17% for Glu. Fifty individual tests are sufficient to analyze multiple subsamples, identify outliers, and derive robust sample mean values. The new age equation can be applied to verify and refine age models for sediment cores elsewhere in the Arctic Ocean, a critical region for understanding the dynamics of global climate change.
    Materialart: Dataset
    Format: application/zip, 3 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 15
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    (Table S1) Amino acids in Neogloboquadrina pachyderma from the Artcic Ocean
    PANGAEA
    Details
    Publikationsdatum: 2023-06-27
    Schlagwort(e): AO96-12-1PC; Arctic Ocean; Aspartic acid; Aspartic acid D/L ratio; Comment; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Glutamic acid; Glutamic acid D/L ratio; Healy; Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05); High Performance Liquid Chromatography (HPLC); HLY0503; HLY0503-08JPC; HLY0503-10MC; HLY0503-11MC; JPC; Jumbo Piston Core; Laboratory code/label; Latitude of event; Longitude of event; Mendeleev Ridge, Arctic Ocean; MUC; MultiCorer; Number of tests; OD96_12-1; Oden; ODEN-96; PC; PI-88-AR; PI-88-AR_P5; Piston corer; Polar Star; Ratio; Serine; Serine D/L ratio
    Materialart: Dataset
    Format: text/tab-separated-values, 2755 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 16
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    (Table 3) Extent of racemization (D/L) in foraminifera from Arctic Ocean sediment cores
    PANGAEA
    Details
    Publikationsdatum: 2023-06-27
    Schlagwort(e): AGE; AO96-12-1PC; Arctic Ocean; Aspartic acid D/L ratio; Aspartic acid D/L ratio, standard deviation; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Glutamic acid D/L ratio; Glutamic acid D/L ratio, standard deviation; Healy; Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05); High Performance Liquid Chromatography (HPLC); HLY0503; HLY0503-08JPC; HLY0503-10MC; HLY0503-11MC; JPC; Jumbo Piston Core; Laboratory code/label; Latitude of event; Longitude of event; Mendeleev Ridge, Arctic Ocean; MUC; MultiCorer; Number; Number of subsamples; OD96_12-1; Oden; ODEN-96; PC; PI-88-AR; PI-88-AR_P5; Piston corer; Polar Star
    Materialart: Dataset
    Format: text/tab-separated-values, 405 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 17
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    (Table 4) Age determination of sediment cores from the north Queensland margin
    PANGAEA
    Details
    Publikationsdatum: 2023-06-27
    Schlagwort(e): 51-GC43; Age, 14C AMS; Age, 14C calibrated, CALIB 4.3 (Stuiver et al., 1998); Age, dated; Age, dated material; Age, dated standard deviation; Calendar age; Calendar age, standard deviation; DEPTH, sediment/rock; Elevation of event; Event label; FR9005; FR9005_PC27; FR9204; FR9204_PC11; FR9204_PC12; FR9204_PC13; FR9204_PC14; FR9204_PC16; FR9204_PC42; Franklin; GC; Gravity corer; Great Barrier Reef, Australia; Laboratory code/label; Latitude of event; Longitude of event; PC; Piston corer; Reference/source; Sample code/label
    Materialart: Dataset
    Format: text/tab-separated-values, 280 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 18
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    (Table 5) Amino acids in sediment cores from the north Queensland margin
    PANGAEA
    Details
    Publikationsdatum: 2023-06-27
    Schlagwort(e): 51-GC43; AGE; Aspartic acid D/L ratio; Aspartic acid D/L ratio, standard deviation; DEPTH, sediment/rock; Elevation of event; Event label; FR9005; FR9005_PC15; FR9005_PC27; FR9204; FR9204_PC10; FR9204_PC11; FR9204_PC12; FR9204_PC13; FR9204_PC14; FR9204_PC16; FR9204_PC36; FR9204_PC42; Franklin; GC; Glutamic acid D/L ratio; Glutamic acid D/L ratio, standard deviation; Gravity corer; Great Barrier Reef, Australia; Laboratory code/label; Latitude of event; Longitude of event; PC; Piston corer; Sample amount, subset; Sample code/label; Serine D/L ratio; Serine D/L ratio, standard deviation
    Materialart: Dataset
    Format: text/tab-separated-values, 800 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 19
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    (Table 1) Age determination of sediment core HLY0503-08JPC
    PANGAEA
    In:  Supplement to: Adler, Ruth E; Polyak, Leonid; Ortiz, Joseph D; Kaufman, Darrell S; Channell, James E T; Xuan, Chuang; Grottoli, Andréa G; Sellén, Emma; Crawford, Kevin Richard (2009): Sediment record from the western Arctic Ocean with an improved Late Quaternary age resolution: HOTRAX core HLY0503-8JPC, Mendeleev Ridge. Global and Planetary Change, 68(1-2), 18-29, https://doi.org/10.1016/j.gloplacha.2009.03.026
    Details
    Publikationsdatum: 2023-06-27
    Beschreibung: Sediment core HLY0503-8JPC raised by the HOTRAX'05 expedition from the Mendeleev Ridge was analyzed for multiple lithological, paleontological, and stable-isotopic proxies to reconstruct paleoceanographic conditions in the western Arctic Ocean during the Late Quaternary. The core, extensively sampled in the upper 5 m, reveals pronounced changes in sedimentary environments during the ca. 250 kyr interval encompassing Marine Isotopic Stages (MIS) 1 to 7. An estimated average resolution of 500 yr/sample, at least for the last glacial cycle including the last interglacial, provides more detail than seen in other sedimentary records from the western Arctic Ocean. The age control is provided by 14C and amino acid racemization measurements on planktonic foraminifers and correlations with the stratigraphy developed for the central Lomonosov Ridge and with glacial events at the Eurasian Arctic margin. Cyclic variations in lithology combined with foraminiferal abundance and stable-isotopic composition indicate profound changes in hydrographic and depositional environments between interglacial-type and glacial-type periods apparently reflecting a combination of 100-kyr and precessional time scales. This periodicity is complicated by abrupt iceberg- and/or meltwater-discharge events with variable (Laurentide vs. Eurasian) provenance. The proxy record from the interval identified as the last interglacial (MIS 5e), which may aid in understanding the future state of the Arctic Ocean, indicates low ice conditions and possibly enhanced stratification of the water column.
    Schlagwort(e): Age, 14C AMS; Age, 14C calibrated; Age, dated; Age, dated standard deviation; Calendar age; Calendar age, standard deviation; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Healy; Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05); HLY0503; HLY0503-08JPC; JPC; Jumbo Piston Core; Mendeleev Ridge, Arctic Ocean; Sample ID
    Materialart: Dataset
    Format: text/tab-separated-values, 88 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 20
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    (Table 2) Age determination of Arctic Ocean sediment cores (2008)
    PANGAEA
    Details
    Publikationsdatum: 2023-11-04
    Schlagwort(e): Age, 14C AMS; Age, 14C calibrated; Age, dated; Age, dated standard deviation; Arctic Ocean; Calendar age; Calendar age, standard deviation; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Healy; Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05); HLY0503; HLY0503-08JPC; HLY0503-10MC; HLY0503-11MC; JPC; Jumbo Piston Core; Laboratory code/label; Latitude of event; Longitude of event; Mendeleev Ridge, Arctic Ocean; MUC; MultiCorer
    Materialart: Dataset
    Format: text/tab-separated-values, 88 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
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