The monsoon imprint during the 'atypical' MIS 13 as seen through north and equatorial Indian Ocean records

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doi: 10.1016/j.yqres.2011.07.001
Author(s): Caley, Thibaut; Malaize, Bruno; Bassinot, Franck; Clemens, Steven C.; Caillon, Nicolas; Rossignol, Linda; Charlier, Karine; Rebaubier, Helene
Author Affiliation(s): Primary:
Université de Bordeaux, Ecologie et Biogéochimie des Systèmes Côtiers, Bordeaux, France
Other:
Versailles Saint-Quentin-en-Yvelines University, France
Brown University, United States
Volume Title: Quaternary Research
Source: Quaternary Research, 76(2), p.285-293. Publisher: Elsevier, New York, NY, United States. ISSN: 0033-5894 CODEN: QRESAV
Note: In English. 78 refs.; illus., incl. sketch map
Summary: Previous studies have suggested that Marine Isotope Stage (MIS) 13, recognized as atypical in many paleoclimate records, is marked by the development of anomalously strong summer monsoons in the northern tropical areas. To test this hypothesis, we performed a multi-proxy study on three marine records from the tropical Indian Ocean in order to reconstruct and analyse changes in the summer Indian monsoon winds and precipitations during MIS 13. Our data confirm the existence of a low-salinity event during MIS 13 in the equatorial Indian Ocean but we argue that this event should not be considered as "atypical". Taking only into account a smaller precession does not make it possible to explain such precipitation episode. However, when considering also the larger obliquity in a more complete orbitally driven monsoon "model," one can successfully explain this event. In addition, our data suggest that intense summer monsoon winds, although not atypical in strength, prevailed during MIS 13 in the western Arabian Sea. These strong monsoon winds, transporting important moisture, together with the effect of insolation and Eurasian ice sheet, are likely one of the factors responsible for the intense monsoon precipitation signal recorded in China loess, as suggested by model simulations. Abstract Copyright (2011) Elsevier, B.V.
Year of Publication: 2011
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Alkaline earth metals; Arabian Sea; Calcium; Cenozoic; Chemostratigraphy; Cores; Foraminifera; Indian Ocean; Invertebrata; Isotope ratios; Isotopes; Leg 117; Lithostratigraphy; MIS 13; Magnesium; Marine sediments; Metals; Mg/Ca; Microfossils; Monsoons; O-18/O-16; ODP Site 722; Ocean Drilling Program; Oxygen; Paleo-oceanography; Paleoclimatology; Pleistocene; Protista; Quaternary; Salinity; Sediments; Stable isotopes; Upper Pleistocene
Coordinates: N050400 N050400 E0735300 E0735300
N163718 N163719 E0594746 E0594745
Record ID: 2013020338
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands