An unusual mid-Pleistocene monsoon period over Africa and Asia

Online Access: Get full text
doi: 10.1038/32631
Author(s): Rossignol-Strick, Martine; Paterne, M.; Bassinot, F. C.; Emeis, K. C.; de Lange, G. J.
Author Affiliation(s): Primary:
Université Pierre et Marie Curie, Laboratorie de Paléontologie et Palynologie, Paris, France
Other:
CNRS, France
Institut fur Ostseeforschung Warnemunde, Federal Republic of Germany
Utrecht University, Netherlands
Volume Title: Nature (London)
Source: Nature (London), 392(6673), p.269-272. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836 CODEN: NATUAS
Note: In English. 30 refs.; illus.
Summary: A high-resolution oxygen isotope record of a sediment core drilled in the Ionian Sea shows an unusual thick sapropel, dated at 528-525 k.y., and is one of a succession of sapropels deposited intermittently in the deep E Mediterranean. This thick sapropel is unusual in indicating that tropical summer insolation. A regional monsoon anomaly resulted in flooding of the River Nile and deposition of the thick sapropel, and was part of a heavy monsoon over Africa and Asia in concurrence with low insolation. Down-hole logs are figured of Δ18O with depth. The results indicate a 3000-yr period of heavy monsoons over Africa during the Quaternary.
Year of Publication: 1998
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Africa; Asia; Atmospheric precipitation; Cenozoic; Climate forcing; Construction; Cores; Cycles; Depositional environment; Foraminifera; Frequency; Invertebrata; Isotopes; Mediterranean Sea; Microfossils; Middle Pleistocene; Miospores; Monsoons; Nile River; O-18/O-16; Orbital forcing; Organic compounds; Oxygen; Paleoclimatology; Palynomorphs; Pleistocene; Pollen; Protista; Quaternary; Salinity; Sapropel; Sea-surface temperature; Stable isotopes; Vegetation
Record ID: 1998031134
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom

Similar Items