Addison, Jason A; Finney, Bruce P; Jaeger, John; Stoner, Joseph S; Norris, Richard D; Hangsterfer, Alexandra: Age determination of a temperate fjord in Alaska over the last 2,000 years [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.980871 (dataset in review), In: Addison, JA et al.: Scanning XRF elemental bromine (Br) and chlorine (Cl) data from a temperate fjord in Alaska over the last 2,000 years [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.980873 (dataset in review)
Abstract:
Marine sediment core EW0408-33JC (57.162°N, 135.357°W, 146 m water depth) was recovered from Katlian Bay, a temperate fjord near Sitka, Alaska, in August 2004. EW0408-33JC is the jumbo piston core collected from the same site as EW0408-32MC, which was described in Addison et al. (2013, doi:10.1002/jgrc.20243). This data release describes the age control points for the most recent 2,000 years of EW0408-33JC, as established by a combination of radiometric 137Cs and excess 210Pb (Addison et al. (2013, doi:10.1002/jgrc.20243)), and five accelerator mass spectrometry (AMS) 14C samples. After calibrating these AMS 14C samples using the INTCAL20 curve (Reimer et al., 2020, doi:10.1017/RDC.2020.41) in CALIB 8.20 (Stuvier and Reimer, 1993, doi:10.1017/S0033822200013904) to calendar ages, the full set of geochronology data was input into the R software program (R Core Team, 2021; https://www.R-project.org) package CLAM (v. 2.6.1; Blaauw et al., 2010, doi:10.1016/j.quageo.2010.01.002) to generate a composite age-depth model for EW0408-33JC data. The composite depth scale was established using Geotek multi-sensor core logger (MSCL) data and linescan imagery to align EW0408-32MC, EW0408-33JC, and the trigger core for the jumbo piston core system EW0408-33TC. The MSCL data (gamma-ray wet bulk density and whole-round magnetic susceptibility) and linescans showed that EW0408-32MC recovered the sediment-water interface (see Addison et al. (2013, doi:10.1002/jgrc.20243) for more details), and that a shift of +0.33 m was needed to align EW0408-33TC with the datum of -32MC, and a shift of +0.54 m was required to align EW0408-33JC; together, these alignments permitted the generation of a continuous composite depth scale from 0 m (= sediment-water interface) to 5.53 m bsf (below sea floor), which is the composite depth horizon associated with 2000 calendar years ago.
Keyword(s):
References:
Addison, Jason A; Finney, Bruce P; Jaeger, John M; Stoner, Joseph S; Norris, Richard D; Hangsterfer, Alexandra (2013): Integrating satellite observations and modern climate measurements with the recent sedimentary record: An example from Southeast Alaska. Journal of Geophysical Research: Oceans, 118(7), 3444-3461, https://doi.org/10.1002/jgrc.20243
Blaauw, Maarten (2010): Methods and code for 'classical' age-modelling of radiocarbon sequences. Quaternary Geochronology, 5(5), 512-518, https://doi.org/10.1016/j.quageo.2010.01.002
R Core Team (2021): R: A language and environment for statistical computing. Version 4.1.1. Vienna, Austria: R Foundation for Statistical Computing, https://www.R-project.org
Reimer, Paula J; Austin, William EN; Bard, Edouard; Bayliss, Alex; Blackwell, Paul G; Ramsey, Christopher Bronk; Butzin, Martin; Cheng, Hai; Edwards, R Lawrence; Friedrich, Michael; Grootes, Pieter Meiert; Guilderson, Thomas P; Hajdas, Irka; Heaton, Timothy J; Hogg, Alan G; Hughen, Konrad A; Kromer, Bernd; Manning, Sturt W; Muscheler, Raimund; Palmer, Jonathan G; Pearson, Charlotte; van der Plicht, Johannes; Reimer, Ron W; Richards, David A; Scott, E Marian; Southon, John R; Turney, Chris S M; Wacker, Lukas; Adolphi, Florian; Büntgen, Ulf; Capano, Manuela; Fahrni, Simon M; Fogtmann-Schulz, Alexandra; Friedrich, Ronny; Köhler, Peter; Kudsk, Sabrina; Miyake, Fusa; Olsen, Jesper; Reinig, Frederick; Sakamoto, Minoru; Sookdeo, Adam; Talamo, Sahra (2020): The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP). Radiocarbon, 62(4), 725-757, https://doi.org/10.1017/RDC.2020.41
Stuiver, Minze; Reimer, Paula J (1993): Extended 14C data base and revised CALIB 3.0 14C age calibration program. Radiocarbon, 35(1), 215-230, https://doi.org/10.1017/S0033822200013904
Coverage:
Latitude: 57.162000 * Longitude: -135.357000
Date/Time Start: 2004-08-29T00:00:00 * Date/Time End: 2004-08-31T00:00:00
Minimum Elevation: -146.0 m * Maximum Elevation: -146.0 m
Event(s):
EW0408-32MC2 * Latitude: 57.162000 * Longitude: -135.357000 * Date/Time: 2004-08-29T00:00:00 * Elevation: -146.0 m * Recovery: 0.38 m * Location: Gulf of Alaska * Campaign: EW0408 * Basis: Maurice Ewing * Method/Device: MultiCorer (MUC)
EW0408-33JC * Latitude: 57.162000 * Longitude: -135.357000 * Date/Time: 2004-08-31T00:00:00 * Elevation: -146.0 m * Recovery: 18.19 m * Location: Gulf of Alaska * Campaign: EW0408 * Basis: Maurice Ewing * Method/Device: Jumbo Piston Core (JPC)
EW0408-33TC * Latitude: 57.162000 * Longitude: -135.357000 * Date/Time: 2004-08-31T00:00:00 * Elevation: -146.0 m * Recovery: 0.712 m * Location: Gulf of Alaska * Campaign: EW0408 * Basis: Maurice Ewing * Method/Device: Trigger corer (TC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Depth, top/min | Depth top | m | Addison, Jason A | Sample depth of age control points from EW0408-33JC | |
| 2 | Depth, bottom/max | Depth bot | m | Addison, Jason A | Sample depth of age control points from EW0408-33JC | |
| 3 | Depth, composite | Depth comp | mcd | Addison, Jason A | Composite depth scale generated for EW0408-32MC / 33TC / 33JC that aligns the three cores to a common datum (the sediment-water interface recovered at the top of EW0408-32MC); expressed in meters below sea floor | |
| 4 | Material | Material | Addison, Jason A | Sample materials that were analyzed to generate age-control points. | ||
| 5 | Age, dated | Age dated | ka | Addison, Jason A | Age, 14C AMS | |
| 6 | Age, dated, uncertainty | Age dated unc | ± | Addison, Jason A | Age, 14C AMS | |
| 7 | Calendar age, uncertainty minimum/young | Cal age unc min | ka BP | Addison, Jason A | Age, 14C calibrated, IntCal20 (Reimer et al. 2020) | 2 sigma |
| 8 | Calendar age, uncertainty maximum/old | Cal age unc max | ka BP | Addison, Jason A | Age, 14C calibrated, IntCal20 (Reimer et al. 2020) | 2 sigma |
| 9 | Age, comment | Comm | Addison, Jason A | |||
| 10 | Calendar age, minimum/young | Cal age min | ka BP | Addison, Jason A | Age, 14C AMS | 2 sigma |
| 11 | Calendar age, maximum/old | Cal age max | ka BP | Addison, Jason A | Age, 14C AMS | 2 sigma |
| 12 | Calendar age, median | Cal age median | ka BP | Addison, Jason A | Age, 14C calibrated, CALIB 8.2 and IntCal20 | |
| 13 | Calendar age, uncertainty | Cal age unc | ± | Addison, Jason A | Calculated | Calculated from the midpoint of the min-max INTCAL20 age ranges. |
| 14 | Laboratory | Lab | Addison, Jason A | Source laboratory of 14C measurement | ||
| 15 | Sample ID | Sample ID | Addison, Jason A | Assigned from source 14C laboratory | ||
| 16 | Reference/source | Reference | Addison, Jason A | Previously published age control points | ||
| 17 | Uniform resource locator/link to reference | URL ref | Addison, Jason A |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
91 data points