Comparison of interglacial warm events since the marine oxygen isotope stage 11

Author(s): Oba, Tadamichi; Banakar, Virupaxa K.
Author Affiliation(s): Primary:
Hokkaido University, Tokyo, Japan
Tokyo Metropolitan University, Japan
Geological Survey of Japan, Japan
National Institute of Oceanography, India
Volume Title: Special issue on the symposium "Quaternary research on environmental changes; the past as a key for the present and the future" in commemoration of the semicentennial of the Japan Association for Quaternary Research
Volume Author(s): Okumura, Koji, prefacer; Ono, Akira; Kumai, Hisao; Machida, Hiroshi; Mizuno, Kiyohide
Source: Daiyonki-Kenkyu = Quaternary Research, 46(3), p.223-234; Quaternary research on environmental changes; the past as a key for the present and the future, Tokyo, Japan, Aug. 4-6, 2006, prefaced by Koji Okumura, Akira Ono, Hisao Kumai, Hiroshi Machida and Kiyohide Mizuno. Publisher: Japan Association for Quaternary Research, Tokyo, Japan. ISSN: 0418-2642 CODEN: DAYKAF
Note: In English with Japanese summary. 55 refs.; illus., incl. 3 tables
Summary: Large numbers of oxygen isotopic curves of benthic foraminiferal tests from deep-sea sediment cores have been published. The curves are well-established reliable proxies for past climate and relative sea level fluctuations. In order to understand possible trends in the future climate, a precise identification of warmest events in the past interglacial records becomes a necessity. In this review, we have compared nine hitherto published high-resolution oxygen isotopic records of the last 420 thousand years in order to understand the intensity of the past warm events during interglacial periods. The rating of the intensity of the interglacial events as depicted by the oxygen isotopic variability is as follows; Marine Isotope Stage 5.5 > 9.3 > 11.3 > 1 > 7.5. This rating of interglacial warming is closely comparable with the standard oxygen isotope curve of deep-sea sediment cores and also to the hydrogen isotope curve of the EPICA Dome C ice core from the Antarctica. The remarkably high sea level during the warmest interval within MIS 5.5 reached about 7±4 m above the sea level during MIS 1, and even possibly above the present-day sea level. The MIS 11.3 periods is distinctive as the longest warm period among the last five interglacial periods. This observation clearly suggests that detailed studies of MIS 5.5 and 11.3 are essential for the prediction of the future environment of the Earth under the global warming.
Year of Publication: 2007
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 24 Surficial Geology, Quaternary Geology; Atlantic Ocean; Cenozoic; Chemostratigraphy; Cores; Deep-sea environment; Equatorial Pacific; Foraminifera; Interglacial environment; Invertebrata; Isotope ratios; Isotopes; Leg 162; Marine environment; Marine sediments; Microfossils; North Atlantic; Northeast Atlantic; O-18/O-16; ODP Site 980; ODP Site 983; Ocean Drilling Program; Oxygen; Pacific Ocean; Paleoclimatology; Paleoenvironment; Pleistocene; Protista; Quaternary; Sea-level changes; Sediments; Stable isotopes; Upper Pleistocene
Coordinates: S425500 S425500 E0085400 E0085400
N552906 N552906 W0144208 W0144208
N602412 N602412 W0233826 W0233826
S032100 S032100 W0832100 W0832100
N375000 N375000 W0101000 W0101000
Record ID: 2008035621
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