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| Jimenez-amat, Patricia; Zahn, Rainer. |
| Multidecadal to centennial planktic O-18 and Mg/Ca records were generated at Ocean Drilling Program Site 976 (ODP976) in the Alboran Sea. The site is in the flow path of Atlantic inflow waters entering the Mediterranean and captured North Atlantic signals through the surface inflow and the atmosphere. The records reveal similar climatic oscillations during the last two glacial-to-interglacial transitions, albeit with a different temporal pacing. Glacial termination 1 (T1) was marked by Heinrich event 1 (H1), post-H1 BOlling/AllerOd warming, and Younger Dryas (YD) cooling. During T2 the H11 O-18 anomaly was twice as high and lasted 30% longer than during H1. The post-H11 warming marked the start of MIS5e while the subsequent YD-style cooling occurred during... |
| Tipo: Text |
Palavras-chave: Last interglacial; Ocean perturbation; Heinrich event H11; Climate instability. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00351/46261/46066.pdf |
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| Zhang, Xiao. |
| v Abstract This thesis focused on the Atlantic Meridional Overturning Circulation (AMOC) stability and global climate responses of an altered AMOC in the late Neogene by performing computer simulations, using both intermediate complexity climate models and state-of-the-art coupled climate models. Two time slices were studied: 1) 38 ka BP (kilo years before present), during Heinrich event 4, and 2) around 4- 5 million years ago, when the Panamanian Seaway finally gradually closed. The AMOC is one of the most important climate systems modulating the world climate due to the significant amount of oceanic transport of heat, carbon and nutrients. Understanding the AMOC stability behaviour is essential to investigate climate in the past and present as well as... |
| Tipo: Text |
Palavras-chave: Atlantic Meridional Overturning Circulation; Climate instability; State-of-the-art model simulation. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00505/61710/65679.pdf |
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