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): (Table 1) Age determination of sediment core HLY0503-08JPC [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.817629, Supplement to: Adler, RE et al. (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
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Abstract:
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.
Coverage:
Latitude: 79.592750 * Longitude: -172.501583
Date/Time Start: 2005-08-20T00:00:00 * Date/Time End: 2005-08-20T00:00:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.625 m
Event(s):
HLY0503-08JPC * Latitude: 79.592750 * Longitude: -172.501583 * Date/Time: 2005-08-20T00:00:00 * Elevation: -2792.0 m * Recovery: 11.88 m * Location: Mendeleev Ridge, Arctic Ocean * Campaign: HLY0503 (Healy-Oden Trans Arctic Expedition 2005 (HOTRAX05)) * Basis: Healy * Method/Device: Jumbo Piston Core (JPC)
Comment:
Measured on planktonic foraminiferal samples. Holocene ages are median probability ages based on calibration using CALIB v 5.0.2 (http://calib.qub.ac.uk/calib/); older ages were calibrated using the Fairbanks0107 program [Fairbanks et al., 2005, doi:10.1016/j.quascirev.2005.04.007]. No Delta R was applied.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample ID | Sample ID | Adler, Ruth E | samples were analyzed at the NSF Radiocarbon Facility, University of Arizona (AA) or University of California, Irvine (UCIAMS) | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Depth, top/min | Depth top | m | Adler, Ruth E | ||
| 4 | Depth, bottom/max | Depth bot | m | Adler, Ruth E | ||
| 5 | Age, dated | Age dated | ka | Adler, Ruth E | Age, 14C AMS | |
| 6 | Age, dated standard deviation | Age dated std dev | ± | Adler, Ruth E | Age, 14C AMS | 1 sigma |
| 7 | Calendar age | Cal age | ka BP | Adler, Ruth E | Age, 14C calibrated | |
| 8 | Calendar age, standard deviation | Cal age std dev | ± | Adler, Ruth E | Age, 14C calibrated | 1 sigma |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
88 data points