Understanding MIS 11 by integrating land-sea-ice records from the SHACK site (IODP 1385, SW Iberian margin)

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Author(s): Oliveira, Dulce; Sanchez Goñi, Maria Fernanda; Naughton, Filipa; Hodell, David; Rodrigues, Teresa; Daniau, Anne-Laure; Eynaud, Frederique; Trigo, Ricardo; Abrantes, Fatima
Integrated Ocean Drilling Program, Expedition 339 Scientists
Author Affiliation(s): Primary:
Université, Talence, France
Instituto Português do Mar e da Atmosfera, Lisbon, Portugal
Godwin Laboratory for Palaeoclimate Research, Cambridge, United Kingdom
CIMAR, Porto, Portugal
University of Lisbon, Lisbon, Portugal
Volume Title: European Geosciences Union general assembly 2014
Source: Geophysical Research Abstracts, Vol.16; European Geosciences Union general assembly 2014, Vienna, Austria, April 27-May 2, 2014. Publisher: Copernicus GmbH on behalf of the European Geosciences Union (EGU), Katlenburg-Lindau, Germany. ISSN: 1029-7006
Note: In English
Summary: The understanding of natural climate variability during past interglacials provides crucial information not only of the ongoing climate dynamics, but also of the different processes that triggered glacial inceptions. The relationship (including feedbacks) between insolation, greenhouse gas concentrations (GHG) and ice volume has been invoked to explain the diversity of interglacials (intensity, character and duration), occurring after 800 ka. Superimposed to this orbital-scale variability, climate changes at a millennial time-scale have also punctuated interglacials. Nevertheless, the external (insolation) and internal (ice volume, GHG, ocean and atmospheric dynamics, vegetation) processes controlling the magnitude of the climate optimum (warmest period), length and millennial-scale variability of past warm periods are far from being understood. Consequently, it is of extreme importance to increase the information of natural climate variations that occurred in past interglacial periods. The Marine Isotope Stage (MIS) 11, c. 425-370 ka BP, is, in terms of orbital configuration, one of the closest analogs to the present interglacial and therefore a key past warm period. Here we show the response of SW European ecosystems to climate variability of the North Atlantic region during MIS 11, by comparing directly terrestrial and marine proxies in Site U1385, on the West Iberian margin, from IODP Expedition 339, at a high temporal resolution. Unravelling the processes behind the natural climatic variability of this interglacial at orbital, millennial and sub-millennial scales will improve current knowledge about the evolution of our present warm interval, without human intervention, and on the mechanisms that push Earth's climate into glacial conditions. [Copyright Author(s) 2014. CC Attribution 3.0 License: https://creativecommons.org/licenses/by/3.0/legalcode]
Year of Publication: 2014
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Atlantic Ocean; Cenozoic; Climate change; Continental margin; Cores; Europe; Expedition 339; IODP Site U1385; Iberian Peninsula; Integrated Ocean Drilling Program; Marine sediments; North Atlantic; Paleoclimatology; Portugal; Quaternary; Sediments; Southern Europe; Spain
Coordinates: N373417 N373417 W0100719 W0100720
Record ID: 2019066781
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from European Geosciences Union, Munich, Germany