|
|
|
|
|
| Meckler, A. Nele; Haug, Gerald H.; Sigman, Daniel M.; Plessen, Birgit; Peterson, Larry C.; Thierstein, Hans R.. |
| For the last deglaciation and Termination V ( the initiation of MIS 11 at around 430 ka) we report high-resolution sedimentary nitrogen isotope (delta(15)N)records from Cariaco Basin in the Caribbean Sea. During both terminations the previously reported interglacial decrease in delta(15)N clearly lags local changes such as water column anoxia as well as global increases in denitrification by several thousand years. On top of the glacial-interglacial change, several delta(15)N peaks were observed during the last deglaciation. The deglacial signal in Cariaco Basin can be best explained as a combination of (1) local variations in suboxia and water column denitrification as the reason for the millennial-scale peaks, (2) a deglacial maximum in mean ocean... |
| Tipo: Text |
Palavras-chave: Cariaco Basin; N fixation; Deglaciation. |
| Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/00233/34457/32869.pdf |
| |
|
|
| Deplazes, Gaudenz; Meckler, A Nele; Peterson, Larry C.; Hamann, Yvonne; Aeschlimann, Beat; Günther, Detlef; Martínez‐garcía, Alfredo; Haug, Gerald H.. |
| High‐resolution palaeorecords of climate are critical to improving current understanding of climate variability, its sensitivity and impact on the environment in the past and in the future. Sediments from the Cariaco Basin off the coast of Venezuela have proven to be sensitive recorders of tropical palaeoclimate variability down to an annual scale. However, the fingerprint of climate and sea level in the sediments of the last glacial period is still not completely understood. In this study, lamination analysis of sediments from the Cariaco Basin is extended to the last glacial period. Detailed sedimentological and geochemical analysis (laser ablation–inductively coupled plasma–mass spectrometry) reveals couplets of light‐coloured, terrigenous‐rich and... |
| Tipo: Text |
Palavras-chave: Cariaco Basin; Caribbean Sea; Flooding events; Glacial; Interglacial climate; Sea-level oscillations; Varved marine sediments. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00471/58302/60827.pdf |
| |
|
|
|
