Citation:

PANGAEA.971520 (dataset in review)

Name: Organic carbon (OC) content, nitrogen content, C/N ratio, carbonate content, δ13C of OC, mean grain size, surface area, calculated fraction, content and loading of terrestrial and marine OC in surface sediments of Helgoland Mud Area in the North Sea
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Carbon Burial; Helgoland mud area; North Sea; stable carbon isotopes δ13C

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Abstract:

The grain size of sediments was determined with a Cilas 1180 laser-diffraction particle analyzer (range 0.04–2500 μm) and the mean grain size was calculated. The surface area (SA) was calculated from the grain size distribution of the sediments. The OC content of surface sediments was determined using a carbon-sulfur analyzer (CS-125, Leco) after decarbonization with HCl. The total carbon (TC) and nitrogen (TN) contents of the samples were analyzed using a carbon-nitrogen-sulfur analyzer (Elemental III, Vario) and used to calculate carbonate contents (CaCO3= (TC − OC) × 8.333) and the mass ratio of OC to TON content ((C/N)OC), which was corrected for mineral-associated inorganic N. The stable carbon isotope composition of OC in surface sediments (δ13COC) was measured using a Thermo Delta isotope ratio mass spectrometer coupled to a Carlo Erba elemental analyzer. δ13COC values are given in per mil notation relative to the Vienna Pee Dee Belemnite standard. The standard deviation of duplicate analyses ranged from 0.01‰ to 0.18‰, with an average of 0.10‰. See details in related publication (Wei et al., in preparation).

Keyword(s):

Carbon Burial; Helgoland mud area; North Sea; stable carbon isotopes δ13C

Project(s):

Anthropogenic impacts on particulate organic carbon cycling in the North Sea (APOC)

Funding:

Federal Ministry of Education and Research (BMBF), grant/award no. 03F0874D : Ozeane unter Stress: APOC - Anthropogene Einflüsse auf den Kreislauf partikulären organischen Kohlenstoffs in der Nordsee

German Research Foundation (DFG), grant/award no. 390741603 : EXC 2077: The Ocean Floor – Earth's Uncharted Interface

Coverage:

Median Latitude: 54.082991 * Median Longitude: 8.130010 * South-bound Latitude: 53.898300 * West-bound Longitude: 7.919804 * North-bound Latitude: 54.230000 * East-bound Longitude: 8.707200

Date/Time Start: 2022-03-17T13:11:45 * Date/Time End: 2022-04-01T06:22:06

Minimum Elevation: -32.5 m * Maximum Elevation: -1.9 m

Event(s):

HE595_1-3 * Latitude: 54.134669 * Longitude: 8.019095 * Date/Time: 2022-03-17T13:11:45 * Elevation: -26.0 m * Location: North Sea * Campaign: (CYPOC) * Basis: * Method/Device: MultiCorer (MUC)

HE595_6-1 * Latitude: 54.088596 * Longitude: 8.026592 * Date/Time: 2022-03-18T11:00:00 * Elevation: -25.6 m * Location: North Sea * Campaign: (CYPOC) * Basis: * Method/Device: MultiCorer (MUC)

HE595_9-1 * Latitude: 54.095192 * Longitude: 8.073844 * Date/Time: 2022-03-19T08:51:47 * Elevation: -20.0 m * Location: North Sea * Campaign: (CYPOC) * Basis: * Method/Device: MultiCorer (MUC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Wei, Bingbing		Station number
2	LATITUDE	Latitude		Wei, Bingbing		Geocode
3	LONGITUDE	Longitude		Wei, Bingbing		Geocode
4	ELEVATION	Elevation	m a.s.l.	Wei, Bingbing		Geocode – Inverted water depth
5	DEPTH, sediment/rock	Depth sed	m	Wei, Bingbing		Geocode
6	Depth, top/min	Depth top	m	Wei, Bingbing
7	Depth, bottom/max	Depth bot	m	Wei, Bingbing
8	Nitrogen, total	TN	%	Wei, Bingbing	Carbon and nitrogen and sulfur (CNS) isotope element analyzer, Elementar, Vario EL III	wt.%
9	Carbon, organic, total	TOC	%	Wei, Bingbing	Element analyser CHN, LECO CS 125	wt.%
10	Carbon, organic, total/Nitrogen, organic, total ratio	TOC/TON		Wei, Bingbing	Calculated	calibrated; mass ratio corrected for mineral-associated inorganic N
11	Calcium carbonate	CaCO3	%	Wei, Bingbing	Calculated	(CaCO3= (TC − OC) × 8.333)
12	δ13C, organic carbon	δ13C Corg	‰ PDB	Wei, Bingbing	Isotope ratio mass spectrometer, Thermo, Delta; coupled to elemental analyzer, Carlo Erba	of bulk OC; vs. ‰ VPDB
13	δ13C, organic carbon, standard deviation	δ13C Corg std dev	±	Wei, Bingbing	Isotope ratio mass spectrometer, Thermo, Delta; coupled to elemental analyzer, Carlo Erba
14	Grain size, mean	Grain size mean	µm	Wei, Bingbing	Grain size, CILAS 1180 Laser Particle Analyser	calculated; range 0.04–2500 μm
15	Surface area	SA	m²/g	Wei, Bingbing	Calculated from the grain size distribution of the sediments
16	Carbon, organic, marine fraction	OC mar fract		Wei, Bingbing		calculated fraction of marine OC
17	Carbon, organic, marine fraction, standard deviation	OC mar fract std dev	±	Wei, Bingbing
18	Carbon, organic, terrestrial fraction	OC terr fract		Wei, Bingbing		calculated fraction of terrestrial OC
19	Carbon, organic, terrestrial fraction, standard deviation	OC terr fract std dev	±	Wei, Bingbing
20	Carbon, organic, marine	OC mar	%	Wei, Bingbing		marine OC content; wt.%
21	Carbon, organic, marine, standard deviation	OC mar std dev	±	Wei, Bingbing
22	Carbon, organic, terrestrial	OC terr	%	Wei, Bingbing		terrestrial OC content; wt.%
23	Carbon, organic, terrestrial, standard deviation	OC terr std dev	±	Wei, Bingbing
24	Carbon, organic, loading	C org loading	mg/m²	Wei, Bingbing
25	Carbon, organic, marine, loading	OC mar loading	mg/m²	Wei, Bingbing
26	Carbon, organic, marine, loading, standard deviation	OC mar loading std dev	±	Wei, Bingbing
27	Carbon, organic, terrestrial, loading	OC terr loading	mg/m²	Wei, Bingbing
28	Carbon, organic, terrestrial, loading, standard deviation	OC terr loading std dev	±	Wei, Bingbing

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:

933 data points

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