Central Mediterranean mid-Pleistocene paleoclimatic variability and its association with global climate

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doi: 10.1016/j.palaeo.2015.11.009
Author(s): Capotondi, Lucilla; Girone, Angela; Lirer, Fabrizio; Bergami, Caterina; Verducci, Marina; Vallefuoco, Mattia; Afferri, Angelica; Ferraro, Luciana; Pelosi, Nicola; de Lange, Gert J.
Author Affiliation(s): Primary:
CNR, Istituto Scienze Marine, Bologna, Italy
Other:
Universita di Bari Aldo Moro, Italy
Universita di Siena, Italy
Utrecht University, Netherlands
Volume Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source: Palaeogeography, Palaeoclimatology, Palaeoecology, Vol.442, p.72-83. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 CODEN: PPPYAB
Note: In English. 158 refs.; illus., incl. 1 table, sketch map
Summary: Planktonic foraminiferal assemblages were studied at high-resolution in core KC01B from the Ionian Sea. Quantitative analysis allowed us to distinguish the main climatic features and associated paleoceanographic changes, that occurred between Marine Isotopic Stages (MIS) 13 and 9 (∼ 500-300 ka). MIS 12 and MIS 10 are characterized by relatively temperate conditions and an oligotrophic oceanographic regime in the early part and by colder conditions and nutrient supply in the sub-surface water masses in the upper part. During these intervals, small but distinct peaks of Neogloboquadrina pachyderma sinistral (sin) are detected at times of extremely negative values of the planktonic foraminifera paleoclimatic curve. Their co-occurrence with similar episodes in the Atlantic suggests that the climate in the Central Mediterranean was associated with north-Atlantic millennial-scale climate instability. MIS 11 and MIS 9 are dominated by surficial warm-water taxa. The climate optimum is reached in the middle part of each of these stages, as denoted by the presence of Globigerinoides sacculifer, and persists for approximately 20 and 6 ka during MIS 11 and MIS 9 respectively. This warming is not constant but is characterized by three distinct intervals with elevated winter temperatures and/or weak winter mixing. Distribution of Globigerina bulloides, Turborotalita quinqueloba and N. pachyderma dextral (dex) indicates that significant environmental changes occur across the transitions from glacial to interglacial MIS 12/MIS 11 (Termination V) and MIS 10/MIS 9 (Termination IV). The studied record documents a close linkage between Mediterranean climate evolution and higher- and lower-latitude climate change throughout MIS 13-9. Abstract Copyright (2016) Elsevier, B.V.
Year of Publication: 2016
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Age; Assemblages; Biostratigraphy; Calabrian Ridge; Cenozoic; Central Mediterranean Sea; Climate; Climate change; Cores; Depth; East Mediterranean; Foraminifera; Glacial environment; Global; Globigerina; Globigerina bulloides; Globigerinacea; Globigerinidae; Globigerinoides; Globigerinoides ruber; Globigerinoides sacculifer; Interglacial environment; Invertebrata; Ionian Sea; Isotope ratios; Isotopes; Leg 161; MIS 10; MIS 11; MIS 12; MIS 13; MIS 9; Marine environment; Marine sediments; Mediterranean Sea; Middle Pleistocene; Minorca Rise; Neogloboquadrina; Neogloboquadrina pachyderma; O-18/O-16; ODP Site 975; Ocean Drilling Program; Organic compounds; Oxygen; Paleo-oceanography; Paleoclimatology; Pisano Plateau; Planktonic taxa; Pleistocene; Protista; Quaternary; Regional; Rotaliina; Sapropel; Sea-level changes; Sediments; Stable isotopes; Temperature; Turborotalita quinqueloba; Variability; West Mediterranean
Coordinates: N385348 N385348 E0043036 E0043036
N361515 N361515 E0174420 E0174420
Record ID: 2016046311
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands