Climatic and oceanographic changes in the Azores region during the last 74.7 Ka
- Autori: Bonfardeci, Alessandro*; Caruso, Antonio; Bartolini, Annachiara; Bassinot, Franck; Blanc-Valleron, Marie-Madeleine
- Anno di pubblicazione: 2018
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: Azores Front/Current System; Foraminifera; Palaeoceanography; Palaeoclimatology; Stable isotopes; Subtropical Gyre; Archeology (arts and humanities); Geology; Earth-Surface Processes; Paleontology
- OA Link: http://hdl.handle.net/10447/297066
Abstract
In this study, we reconstruct the complex palaeoclimatic and palaeohydrographic history of the North Atlantic Ocean during the Upper Pleistocene-Holocene, through a high-resolution Globigerinoides ruber - Globigerinoides elongatus plexus study. The studied core (ATA13-OF-KT1) was collected southwest of the Azores islands near the present-day boundary of the Subtropical Gyre/Azores Front Current System (STG/AFCS). Quantitative and stable isotope data of the G. ruber - G. elongatus plexus chromotypes and selected morphotypes showed cyclic oscillations of the STG/AFCS boundary linked to climatic variability at orbital and millennial scales, during the last 74.7 ka.