Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Mackensen, Andreas (2013): Epibenthic foraminiferal δ¹³C in the Recent deep Arctic Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.819226, Supplement to: Mackensen, A (2013): High epibenthic foraminiferal d13C in the recent deep Arctic Ocean: implications for ventilation and brine release during stadials. Paleoceanography, 28(3), 574-584, https://doi.org/10.1002/palo.20058

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Low planktic and benthic d18O and d13C values in sediments from the Nordic seas of cold stadials of the last glaciation have been attributed to brines, formed similar to modern ones in the Arctic Ocean. To expand on the carbon isotopes of this hypothesis I investigated benthic d13C from the modern Arctic Ocean. I show that mean d13C values of live epibenthic foraminifera from the deep Arctic basins are higher than mean d13C values of upper slope epibenthic foraminifera. This agrees with mean high d13C values of dissolved inorganic carbon (DIC) in Arctic Bottom Water (ABW), which are higher than mean d13CDIC values from shallower water masses of mainly Atlantic origin. However, adjustments for oceanic 13C-Suess depletion raise subsurface and intermediate water d13CDIC values over ABW d13CDIC ones. Accordingly, during preindustrial Holocene times, the d13CDIC of ABW was as high or higher than today, but lower than the d13CDIC of younger subsurface and intermediate water. If brine-enriched water significantly ventilated ABW, brines should have had high d13CDIC values. Analogously, high-d13CDIC brines may have been formed in the Nordic seas during warm interstadials. During cold stadials, when most of the Arctic Ocean was perennially sea-ice covered, a cessation of high-d13CDIC brine rejection may have lowered d13CDIC values of ABW, and ultimately the d13CDIC in Nordic seas intermediate and deep water. So, in contrast to the idea of enhanced brine formation during cold stadials, the results of this investigation imply that a cessation of brine rejection would be more likely.
Further details:
Poore, Richard Z; Ostermann, Dorinda R; McGeehin, John P (1999): (Table 7) Carbon and oxygen isotope values for foraminifera in Arctic Ocean surface sediment samples. PANGAEA, https://doi.org/10.1594/PANGAEA.819248 (previously published AOS94 samples, C. wuellerstorfi unstained)
Coverage:
Median Latitude: 78.320149 * Median Longitude: 6.972624 * South-bound Latitude: 65.845000 * West-bound Longitude: -179.835980 * North-bound Latitude: 88.873300 * East-bound Longitude: 179.047400
Date/Time Start: 1988-06-02T00:00:00 * Date/Time End: 2012-08-01T00:00:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
Event(s):
AOS94_B07 * Latitude: 76.666500 * Longitude: -173.384800 * Date/Time: 1994-08-01T00:00:00 * Elevation: -2214.0 m * Location: Arctic Ocean * Campaign: AOS94 * Basis: Louis S. St-Laurent * Method/Device: Box corer (BC) * Comment: exact samplig date unknown
AOS94_B08 * Latitude: 78.128000 * Longitude: -176.744510 * Date/Time: 1994-08-03T00:00:00 * Elevation: -1031.0 m * Location: Arctic Ocean * Campaign: AOS94 * Basis: Louis S. St-Laurent * Method/Device: Box corer (BC)
AOS94_B12A * Latitude: 79.988700 * Longitude: -174.288700 * Date/Time: 1994-08-05T00:00:00 * Elevation: -1609.0 m * Location: Mendeleev Ridge, Arctic Ocean * Campaign: AOS94 * Basis: Louis S. St-Laurent * Method/Device: Box corer (BC)
Comment:
Exact sampling date for cruises AOS94 and ARA03B are not given. All samples, except those from PRV Araon, were Rose Bengal stained. Includes 12 C. wuellerstorfi d13C values from unstained surface sediment samples taken in 1994 in the Mendeleyev Ridge area of the Amerasian basin (Poore et al., 1999).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Campaign of eventCampaign
2Event labelEvent
3Date/Time of eventDate/Time
4Latitude of eventLatitude
5Longitude of eventLongitude
6Elevation of eventElevationm
7DEPTH, sediment/rockDepth sedmGeocode
8Cibicidoides spp., δ13CCibicidoides spp. δ13C‰ PDBMackensen, AndreasMass spectrometer, Finnigan, MAT 251; Mass spectrometer, Finnigan, MAT 253with respect to VPDB; Cibicidoides wuellerstorfi, if C. wuellerstorfi specimens were not available Cibicides lobatulus and Cibicides refulgens were analyzed; size fraction >125 µm
Size:
305 data points

Download Data

Download dataset as tab-delimited text — use the following character encoding:

View dataset as HTML