Sediment properties of Beaufort Sea sediment cores PCB09 and PCB11 — foraminifera counts and biomarkers

Julie Lattaud, Madeleine Santos, Lisa Bröder, Ivan Hernandez, Matt O'Regan

This dataset includes sediment properties (TOC, d13C), foraminifera counts, biomarker concentration and biomarker proxies of two sediment cores, PCB09 and PCB11 collected in 2021.

Biomarker and foraminifera counts can be used to trace sea-ice cover, temperature and environmental parameters during the Holocene.

The two cores were retrieved during the PeCaBeau cruise, part of leg 4 of the 2021 AMD2104 expedition. Both cores cover the last 9 to 13 ka.

MarineGeochemistryBeaufort SeaBiomarkerSea ice

Name

Version

Citation

References

Santos M, Bröder L, O’Regan M, Hernández-Almeida I, Tesi T, Bigler L, Haghipour N, Nelson DB, Fritz M, Lattaud J (2026) Holocene sea ice and paleoenvironment conditions in the Beaufort Sea (Canadian Arctic) reconstructed with lipid biomarkers. Climate of the Past 22:187–203. https://doi.org/10.5194/cp-22-187-2026

Hopmans EC, Weijers JWH, Schefuß E, Herfort L, Sinninghe Damsté JS, Schouten S (2004) A novel proxy for terrestrial organic matter in sediments based on branched and isoprenoid tetraether lipids. Earth and Planetary Science Letters 224:107–116. https://doi.org/10.1016/j.epsl.2004.05.012

Liu X-L, Lipp JS, Simpson JH, Lin Y-S, Summons RE, Hinrichs K-U (2012) Mono- and dihydroxyl glycerol dibiphytanyl glycerol tetraethers in marine sediments: Identification of both core and intact polar lipid forms. Geochimica et Cosmochimica Acta 89:102–115. https://doi.org/10.1016/j.gca.2012.04.053

Varma D, Hopmans EC, van Kemenade ZR, Kusch S, Berg S, Bale NJ, Sangiorgi F, Reichart G-J, Sinninghe Damsté JS, Schouten S (2024) Evaluating isoprenoidal hydroxylated GDGT-based temperature proxies in surface sediments from the global ocean. Geochimica et Cosmochimica Acta 370:113–127. https://doi.org/10.1016/j.gca.2023.12.019

Data description

This dataset contains one xlsx file for cores PCB09 (71.1° N, 135.1° W, 675 m water depth) and PCB11 (70.6° N, 136.0° W, 74m water depth). There is one sheet containing the following columns:

• general (5 columns)
  • core type
    • MC multicore
    • PC piston core
    • GGC giant gravity core
  • core name of the core
    • PCB09
    • PCB11
  • section in the core
  • depth_cm depth of the studied slice in the core in cm
  • bottom depth_cm of the slice in cm
• sediment_ages_yrBP (2 columns)
  • age_median median in yr BP
  • error on the age in yr BP
• bulk_organic_matter (2 columns)
  • δ13C_‰ Stable carbon isotope ratio of organic matter (d13C in per mil vs VPDB)
  • TOC_% Total organic carbon
• foraminifera (1 column)
  • nps_#/cm3 Neogloboquadrina pachyderma sinistra count (#/g)
• HBI concentration_ng/g Highly Branched Isoprenoid (HBI) concentration in ng/g (5 columns)
  • IP25 HBI with 25 carbon atoms
  • HBI II HBI with 25 carbon atoms and two double bounds
  • HBI III HBI with 25 carbon atoms and three double bounds
  • HBI IV HBI with 25 carbon atoms and four double bounds
  • PIP25 (the ratio of IP25 with HBI III, the c factor is indicated at the bottom of the sheet)
• sterols_concentration_μg/g Sterols concentration in ug/g (5 columns)
  • brassicasterol
  • campesterol
  • campestanol
  • b-sitosterol
  • stigmastanol
• fatty_acid_hydrogen_isotope_ratio_proxy (3 columns)
  • d2H_C16_‰ Stable hydrogen isotope ratios of the C16 fatty acid measured in duplicate. When no values are indicated no measurements were made on that specific slice of sediment
  • STD_d2H_C16 standard deviation of the measurements of the stable hydrogen isotope ratios of the C16 fatty acid. When no data are indicated low concentration prevented duplicate measurements.
  • salinity_psu+/-7 calculated salinity using the stable hydrogen isotope ratios of the C16 fatty acid calibration from Sachs et al., 2018. The error of the calculation is +/-7psu
• OH-GDGT_ng/g hydroxylated Glycerol dialkyl glycerol tetraether (GDGT) concentration in ng/g (3 columns)
  • OH-GDGT-0 hydroxylated isoprenoid GDGT-0
  • OH-GDGT-1 hydroxylated isoprenoid GDGT-1
  • OH-GDGT-2 hydroxylated isoprenoid GDGT-2
• brGDGT_ng/g branched Glycerol dialkyl glycerol tetraether (GDGT) concentration in ng/g (16 columns)
  • III-a branched 5 methyl GDGT-IIIa
  • III-a branched 6-methyl GDGT-IIIa
  • III-b branched 5 methyl GDGT-IIIb
  • III-b branched 6-methyl GDGT-IIIb
  • III-c branched 5 methyl GDGT-IIIc
  • III-c branched 6-methyl GDGT-IIIc
  • II-a branched 5 methyl GDGT-IIa
  • II-a branched 6-methyl GDGT-IIa
  • II-b branched 5 methyl GDGT-IIb
  • II-b branched 6-methyl GDGT-IIb
  • II-c branched 5 methyl GDGT-IIc
  • II-c branched 6-methyl GDGT-IIc
  • I-a branched GDGT-Is
  • I-b branched GDGT-Ib
  • I-c branched GDGT-Ic
  • sum_brGDGT concentration of all branched GDGT summed
• isoGDGT_ng/g isoprenoid Glycerol dialkyl glycerol tetraether (GDGT) concentration in ng/g (6 columns)
  • GDGT-0 isoprenoid GDGT-0
  • GDGT-1 isoprenoid GDGT-1
  • GDGT-2 isoprenoid GDGT-2
  • GDGT-3 isoprenoid GDGT-3
  • cren isoprenoid crenarchaeol
  • cren_isomer isoprenoid crenarchaeol isomer
• GDGT_proxies biomarker proxies using GDGT (5 columns)
  • RI-OH as defined by Liu et al. (2012)
  • SST-1 using RI-OH' as defined by Varma et al. (2024)
  • TEX-OH as defined by Varma et al. (2024)
  • SST-2 using TEX-OH as defined by Varma et al. (2024)
  • BIT branched over isoprenoid GDGT index as defined by Hopmans et al. (2004).

Project

PeCaBeau

Publisher

Bolin Centre Database

License

Creative Commons Attribution 4.0 International License (CC BY 4.0)

First name

Julie

Last name or organisation

Lattaud

Email address

julie.lattaud@aces.su.se

Address

Department of Environmental Science; Stockholm University

Postal code

SE-106 91

City

Stockholm

Country

Sweden

GCMD science keyword

Earth science > Oceans > Marine sediments > Sediment chemistry

GCMD location

Continent > North America > Canada > Northwest Territories

Dataset language

English

DOI

Time

Versions

• 1 2026-01-27T10:50:18.542+00:00
• 1 2025-10-17T11:46:21.61+00:00
• 1 2025-10-17T11:46:21.353+00:00
• 1 2025-10-17T11:46:21.356+00:00