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| Romero, O. E.; Kim, J. -h.; Barcena, M. A.; Hall, I. R.; Zahn, R.; Schneider, R.. |
| The hydrography of the Indian-Atlantic Ocean gateway has been connected to high-latitude climate dynamics by oceanic and atmospheric teleconnections on orbital and suborbital timescales. A wealth of sedimentary records aiming at reconstructing the late Pleistocene paleoceanography around the southern African continent has been devoted to understanding these linkages. Most of the records are, however, clustered close to the southern South African tip, with comparatively less attention devoted to areas under the direct influence of frontal zones of the Southern Ocean/South Atlantic. Here we present data of the composition and concentration of the diatom assemblage together with bulk biogenic content and the alkenone-based sea surface temperature (SST)... |
| Tipo: Text |
Palavras-chave: Agulhas; SST; Diatoms; Fronts; Silica; Southern Ocean. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00294/40555/39440.pdf |
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| Leduc, G.; Schneider, R.; Kim, J. -h.; Lohmann, G.. |
| In this study we review a global set of alkenone- and foraminiferal Mg/Ca-derived sea surface temperatures (SST) records from the Holocene and compare them with a suite of published Eemian SST records based on the same approach For the Holocene, the alkenone SST records belong to the actualized GHOST database (Kim, J.-H Schneider R.R., (2004) GHOST global database for alkenone-derived Holocene sea-surface temperature records. Available from. http.//www pangaea de/Projects/GHOST.), while the Mg/Ca-derived SST database represents a new compilation The actualized GHOST database not only confirms the SST changes previously described but also documents the Holocene temperature evolution in new oceanic regions such as the Northwestern Atlantic, the eastern... |
| Tipo: Text |
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| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00231/34229/32835.pdf |
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| Romero, O. E.; Crosta, X.; Kim, J. -h.; Pichevin, L.; Crespin, J.. |
| Although productivity variations in coastal upwelling areas are mostly attributed to changes in wind strength, productivity dynamics in the Benguela Upwelling System (BUS) is less straightforward due to its complex atmospheric and hydrographic settings. In view of these settings, past productivity variations in the BUS can be better investigated with downcore sediments representing different productivity regimes. In this study, two sediment cores retrieved at ca. 25°–26°S in the BUS and representing different productivity regimes were studied. By using micropaleontological, geochemical and temperature proxies measured on core MD96-2098, recovered at 2910 m water depth in the bathypelagic zone at 26°S off Namibia, variations of filament front location,... |
| Tipo: Text |
Palavras-chave: Benguela; Diatoms; Millennial and submillennial time scale; Productivity; Sea-surface temperature; SW Atlantic; Upwelling filaments. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00294/40499/39432.pdf |
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