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Citation:
Jacot des Combes, H et al. (2008): Stable isotopes in opal in the Southern Ocean. doi:10.1594/PANGAEA.693833,
Supplement to: Jacot des Combes, Hélène; Esper, Oliver; De La Rocha, Christina L; Abelmann, Andrea; Gersonde, Rainer; Yam, Ruth; Shemesh, Aldo (2008): Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of Species Composition. Paleoceanography, 23, PA4209, doi:10.1029/2008PA001589
Abstract:
Measurements of delta 13C, delta 15N, and C/N on diatom-bound organic matter were made over the Holocene and Last Glacial Maximum (LGM) from 3 piston cores in the Southern Ocean, one from each of the three sectors. The site in the Scotia Sea differed considerably from the other two sites by having markedly lower delta 13C, more variable delta 15N and C/N ratios, and a sedimentary diatom assemblage that was never dominated by Fragilariopsis kerguelensis. Although environmental parameters certainly have a strong impact on the isotope ratios, delta 13C is also correlated to the proportion of F. kerguelensis in the 3 cores investigate here (r**2 = 0.8). Extreme values of delta 13C, delta 15N, and C/N at the Last Glacial Maximum were also related to the abundance of winter stages of Eucampia antarctica. These results suggest that diatom specific isotope records should be interpreted in conjunction with information on the species composition of the samples.
Project(s):
Coverage:
Median Latitude: -56.466000 * Median Longitude: -35.655111 * South-bound Latitude: -61.243000 * West-bound Longitude: -116.047000 * North-bound Latitude: -53.231667 * East-bound Longitude: 40.801667
Minimum Age: 1.620 ka BP * Maximum Age: 30.510 ka BP
Event(s):
PS1786-1 (PS16/372) * * Latitude: -54.923333 * Longitude: -31.720000 * Date/Time: 1989-11-24T00:32:00 * Elevation: -5826.0 m * Recovery: 2.36 m * Penetration: 5.00 m * Location: South Sandwich Trough * * Campaign: ANT-VIII/3 (PS16) * * Basis: Polarstern * * Device: Gravity corer (Kiel type) *
PS2606-6 (PS30/144) * * Latitude: -53.231667 * Longitude: 40.801667 * Date/Time: 1994-05-11T00:00:00 * Elevation: -2545.0 m * Recovery: 12.19 m * Penetration: 15.00 m * Location: Conrad Rise * * Campaign: ANT-XI/4 (PS30) * * Basis: Polarstern * * Device: Piston corer (BGR type) *
PS58/271-1 * * Latitude: -61.243000 * Longitude: -116.047000 * Date/Time Start: 2001-03-20T03:43:00 * Date/Time End: 2001-03-20T05:25:00 * Elevation: -5214.0 m * Recovery: 24.42 m * Location: Southeast Pacific * * Campaign: ANT-XVIII/5a (PS58) * * Basis: Polarstern * * Device: Piston corer (BGR type) *
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