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| Romahn, S.; Mackensen, A.; Groeneveld, J.; Paetzold, J.. |
| The importance of intermediate water masses in climate change and ocean circulation has been emphasized recently. In particular, Southern Ocean Intermediate Waters (SOIW), such as Antarctic Intermediate Water and Subantarctic Mode Water, are thought to have acted as active interhemispheric transmitter of climate anomalies. Here we reconstruct changes in SOIW signature and spatial and temporal evolution based on a 40 kyr time series of oxygen and carbon isotopes as well as planktic Mg/Ca based thermometry from Site GeoB12615-4 in the western Indian Ocean. Our data suggest that SOIW transmitted Antarctic temperature trends to the equatorial Indian Ocean via the "oceanic tunnel" mechanism. Moreover, our results reveal that deglacial SOIW carried a signature... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00274/38489/36944.pdf |
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| Max, L.; Rippert, N.; Lembke-jene, L.; Mackensen, A.; Nürnberg, D.; Tiedemann, R.. |
| We provide high-resolution foraminiferal stable carbon isotope (delta C-13) records from the subarctic Pacific and Eastern Equatorial Pacific (EEP) to investigate circulation dynamics between the extratropical and tropical North Pacific during the past 60 kyr. We measured the delta C-13 composition of the epibenthic foraminiferal species Cibicides lobatulus from a shallow sediment core recovered from the western Bering Sea (SO201-2-101KL; 58 degrees 52.52' N, 170 degrees 41.45' E; 630 m water depth) to reconstruct past ventilation changes close to the source region of Glacial North Pacific Intermediate Water (GNPIW). Information regarding glacial changes in the delta C-13 of subthermocline water masses in the EEP is derived from the deep-dwelling... |
| Tipo: Text |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00420/53196/54997.pdf |
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| Kröncke, I.; Vanreusel, A.; Vincx, M.; Wollenburg, J.; Mackensen, A.; Liebezeit, G.; Behrends, B.. |
| During the Arctic Expedition ARK VIII/3 (August to September 1991) with <i>RV Polarstern</i>, the macrofauna, meiofauna, Foraminifera, bacteria were sampled and sediment chemistry was determined at 13 stations along a transect from the Barents Sea slope across the deep Arctic Eurasian Basins towards the Lomonosov Ridge. Water depths ranged from 258 to 4427 m. In general, higher values for all benthic compartments as well as total organic carbon (TOC) and total hydrolysable amino acids (THAA) were recorded for the Barents Sea slope than for the deeper stations in the basins and the ridge slopes. The only significant correlation found was between macrofaunal abundance and depth. Bacterial and all faunal abundances as well as bacterial and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteria; Foraminifera [hole bearers]. |
| Ano: 2000 |
URL: http://www.vliz.be/imisdocs/publications/273306.pdf |
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