Citation:

PANGAEA.971113 (DOI registration in progress)

Name: Biomarker results from the eastern Fram Strait between 40 and 36.5 ka b2k
Published: 2024
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Arctic; HBI III; IP25; MIS 3; Sea ice

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Abstract:

Here we present a biomarker dataset from marine sediment core MD99-2304, which was retrieved from the eastern Fram Strait (77°37'15.6N, 9°56'54E) with piston corer at 1348 m water depth during cruise Marion Dufresne IMAGES 5 1999 leg MD114. This dataset contains sea ice history in the eastern Fram Strait between 40 and 36.5 ka b2k during MIS 3, with a temporal resolution of 20–40 yrs/sample, for the mechanical understanding of abrupt climate change during the Dansgaard-Oeschger events. Total Organic Carbon (TOC), Highly Branched Isoprenoids (HBIs) IP25, HBI diene, HBI-III (Z-isomer), and HBI III (E-isomer), and the sterols brassicasterol, dinosterol, campesterol, and sitosterol were measured in the organic geochemistry lab at the Alfred Wegener Institute (AWI), Germany in 2022 and 2023. Biomarker values are presented as biomarker μg/TOC. The age model of MD99-2304 is established by tuning is low field magnetic susceptibility to the magnetic susceptibility of Core MD95-2010 from the Norwegian Sea (Kissel et al., 1999 (doi:10.1016/S0012-821X(99)00162-4); updated in Sadatzki et al. (2020, doi:10.1073/pnas.2005849117)), and the age model of MD95-2010 was tied to the chronology of MD99-2284 (Berben et al., 2020, doi:10.1016/j.quascirev.2020.106277).

The biomarkers were measured on an Agilent 7890B GC (30m DB-1MS column, 0.25 mm i.d., 0.25 µm film thickness) coupled to an Agilent 5977A mass selective detector (MSD, 70 eV constant ionization potential, Scan 50–550 m/z, 1 scan/s, ion source temperature 230°C, Performance Turbo Pump), with selected ion monitoring mode (SIM) for HBIs and full scan mode (50-550 m/Z) for sterols. For biomarker concentration normalization, total organic carbon (TOC) was measured using a Carbon-Sulfur Analyzer (CS-125, Leco).

Keyword(s):

Arctic; HBI III; IP25; MIS 3; Sea ice

Supplement to:

Wong, Wanyee; Risebrobakken, Bjørg; Fahl, Kirsten; Stein, Ruediger; Jansen, Eystein; Steinsland, Kristine; Kissel, Catherine (2024): Sea ice in the Nordic Seas: Greenland stadial to interstadial changes. Quaternary Science Reviews, 343, 108916, https://doi.org/10.1016/j.quascirev.2024.108916

Project(s):

ABRUPT Arctic Climate Change (ABRUPT)

Funding:

The Research Council of Norway (RCN), grant/award no. 325333

Coverage:

Latitude: 77.621067 * Longitude: 9.948333

Date/Time Start: 1999-08-01T00:00:00 * Date/Time End: 1999-08-01T00:00:00

Minimum DEPTH, sediment/rock: 8.7425 m * Maximum DEPTH, sediment/rock: 9.7425 m

Event(s):

MD99-2304 (3280N) * Latitude: 77.621067 * Longitude: 9.948333 * Date/Time: 1999-08-01T00:00:00 * Elevation: -1348.0 m * Recovery: 22.885 m * Location: Spitsbergen slope * Campaign: (IMAGES V) * Basis: * Method/Device: Calypso Corer (CALYPSO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Depth, top/min	Depth top	m	Wong, Wanyee
2	Depth, bottom/max	Depth bot	m	Wong, Wanyee
3	DEPTH, sediment/rock	Depth sed	m	Wong, Wanyee		Geocode
4	Depth, corrected	Depth corr	m	Wong, Wanyee		After removing the layer of the turbidte tail)
5	Age	Age	ka b2k	Wong, Wanyee
6	Sample mass	Samp m	g	Wong, Wanyee
7	Carbon, organic, total	TOC	%	Wong, Wanyee	Element analyser CHN, LECO CS 125
8	2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon	IP25/TOC	µg/g	Wong, Wanyee	see abstract
9	Diene highly branched isoprenoids, per unit mass total organic carbon	HBI-diene/TOC	µg/g	Wong, Wanyee	see abstract
10	(9Z)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene, per unit mass total organic carbon	C25 HBI (Z) triene/TOC	µg/g	Wong, Wanyee	see abstract
11	(9E)-2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyliden)pentadeca-9-ene, per unit mass total organic carbon	C25 HBI (E) triene/TOC	µg/g	Wong, Wanyee	see abstract
12	24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon	Brassicasterol/TOC	µg/g	Wong, Wanyee	see abstract
13	4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon	Dinosterol/TOC	µg/g	Wong, Wanyee	see abstract
14	24-Methylcholest-5-en-3beta-ol, per unit mass total organic carbon	Campesterol/TOC	µg/g	Wong, Wanyee	see abstract
15	24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon	b-Sitosterol/TOC	µg/g	Wong, Wanyee	see abstract
16	Sterols, terrestrial, per unit mass total organic carbon	Sterols terr/TOC	µg/g	Wong, Wanyee	see abstract
17	Phytoplankton biomarker C25 HBI (Z) triene IP25 index	P(III)IP25		Wong, Wanyee	see abstract
18	Phytoplankton biomarker Brassicasterol IP25 index	PBIP25		Wong, Wanyee	see abstract
19	Phytoplankton biomarker Dinosterol IP25 index	PDIP25		Wong, Wanyee	see abstract

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2751 data points

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