Late Pliocene climate variability on Milankovitch to millennial time scales; a high-resolution study of MIS100 from the Mediterranean

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doi: 10.1016/j.palaeo.2005.06.020
Author(s): Becker, Julia; Lourens, Lucas J.; Hilgen, Frederik J.; van der Laan, Erwin; Kouwenhoven, Tanja J.; Reichart, Gert-Jan
Author Affiliation(s): Primary:
Utrecht University, Department of Stratigraphy-Paleontology, Utrecht, Netherlands
Volume Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source: Palaeogeography, Palaeoclimatology, Palaeoecology, 228(3-4), p.338-360. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 CODEN: PPPYAB
Note: In English. 144 refs.; illus., incl. 2 tables, sketch map
Summary: Astronomically tuned high-resolution climatic proxy records across marine oxygen isotope stage 100 (MIS100) from the Italian Monte San Nicola section and ODP Leg 160 Hole 967A are presented. These records reveal a complex pattern of climate fluctuations on both Milankovitch and sub-Milankovitch timescales that oppose or reinforce one another. Planktonic and benthic foraminiferal δ18O records of San Nicola depict distinct stadial and interstadial phases superimposed on the saw-tooth pattern of this glacial stage. The duration of the stadial-interstadial alterations closely resembles that of the Late Pleistocene Bond cycles. In addition, both isotopic and foraminiferal records of San Nicola reflect rapid changes on timescales comparable to that of the Dansgard-Oeschger (D-O) cycles of the Late Pleistocene. During stadial intervals winter surface cooling and deep convection in the Mediterranean appeared to be more intense, probably as a consequence of very cold winds entering the Mediterranean from the Atlantic or the European continent. The high-frequency climate variability is less clear at Site 967, indicating that the eastern Mediterranean was probably less sensitive to surface water cooling and the influence of the Atlantic climate system. Concomitant changes in the colour reflectance of ODP Site 967 and the calcium carbonate record of San Nicola probably indicate that part of the high-frequency climate variability (3-5 kyr) in the eastern Mediterranean is related to changes in Saharan dust supply. Evidently, enhanced dust deposition in the Mediterranean correlates with the cold intervals of the millennial-scale D-O oscillations suggesting that the Atlantic pressure system may have played a critical role in varying the wind strength and/or aridification of northern Africa. Abstract Copyright (2005) Elsevier, B.V.
Year of Publication: 2005
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Assemblages; C-13/C-12; Calcium carbonate; Carbon; Carbonate rocks; Cenozoic; Chemical ratios; Chemostratigraphy; Clastic rocks; Cores; East Mediterranean; Europe; Foraminifera; Gela Italy; Glacial environment; Interglacial environment; Invertebrata; Isotope ratios; Isotopes; Italy; Leg 160; Limestone; Lithostratigraphy; Marl; Mediterranean Sea; Microfossils; Milankovitch theory; Monte San Nicola; Neogene; O-18/O-16; ODP Site 967; Ocean Drilling Program; Oxygen; Paleo-oceanography; Paleoclimatology; Paleoenvironment; Paleotemperature; Pliocene; Principal components analysis; Protista; Sedimentary rocks; Sicily Italy; Southern Europe; Stable isotopes; Statistical analysis; Tertiary; Upper Pliocene
Coordinates: N340411 N340411 E0324331 E0324331
N370300 N370300 E0141500 E0141500
Record ID: 2006011070
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands