|
|
|
|
|
| Cacho, I; Grimalt, Jo; Canals, M; Sbaffi, L; Shackleton, Nj; Schonfeld, J; Zahn, R. |
| Sea surface temperature (SST) profiles over the last 25 kyr derived from alkenone measurements are studied in four cores from a W-E latitudinal transect encompassing the Gulf of Cadiz (Atlantic Ocean), the Alboran Sea, and the southern Tyrrhenian Sea (western Mediterranean). The results document the sensitivity of the Mediterranean region to the short climatic changes of the North Atlantic Ocean, particularly those involving the latitudinal position of the polar front. The amplitude of the SST oscillations increases toward the Tyrrhenian Sea, indicating an amplification effect of the Atlantic signal by the climatic regime of the Mediterranean region. All studied cores show a shelter cooling phase (700 years) for the Younger Dryas (YD) than that observed in... |
| Tipo: Text |
|
| Ano: 2001 |
URL: https://archimer.ifremer.fr/doc/00220/33173/31682.pdf |
| |
|
| |
|
| |
|
|
| Skinner, Lc; Shackleton, Nj. |
| A sequence of accelerator mass spectrometry (AMS) C-14 dates performed on benthic and planktonic foraminifera from a northeast Atlantic deep-sea core (MD99-2334K; 37degrees480N, 10degrees10'W; 3146 m) permit the reconstruction of deep water ,,C-14 ventilation ages'' across the last deglaciation. The records from MD99-2334K have been placed on the GISP2 timescale via the synchrony of temperature changes recorded in the Greenland ice cores and in North Atlantic planktonic delta(18)O(cc) (calcite delta(18)O). On the basis of a range of estimates for past source water Delta(14)C, this permits the estimation of C-14 projection ventilation ages for comparison with benthic-planktonic C-14 age differences. Although the accurate estimation of past ventilation ages... |
| Tipo: Text |
Palavras-chave: Termination I; Ventilation age; Thermohaline circulation. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00228/33971/32339.pdf |
| |
|
|
|
