Skip to Main Content
GEOREF RECORD

Links between the onset of modern Walker circulation and the mid-Pleistocene climate transition

Erin L. McClymont and Antoni Rosell-Mele
Links between the onset of modern Walker circulation and the mid-Pleistocene climate transition
Geology (Boulder) (May 2005) 33 (5): 389-392

Abstract

Sea-surface temperatures (SSTs) reconstructed from Ocean Drilling Program Sites 806 and 849 in the western and eastern equatorial Pacific provide a history of the strength of the Walker circulation between 1.5 and 0.5 Ma. A progressive cooling in the eastern equatorial Pacific is paralleled by intensification of the equatorial zonal SST gradient that began 1.17 Ma, prior to the expansion of global ice volume associated with the mid-Pleistocene climate transition. The SSTs in the eastern equatorial Pacific and the zonal gradient reached modern values by 0.9 Ma. We propose that this onset and intensification of the modern Walker circulation reduced heat flux, but increased moisture transport to high latitudes, leading to the development of more extensive ice sheets and the shift toward the 100 ka world.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 33
Serial Issue: 5
Title: Links between the onset of modern Walker circulation and the mid-Pleistocene climate transition
Affiliation: University of Durham, Department of Geography, Durham, United Kingdom
Pages: 389-392
Published: 200505
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 51
Accession Number: 2005-034355
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
N00°10'58" - N00°10'60", W110°31'11" - W110°31'10"
N00°19'06" - N00°19'07", E159°21'40" - E159°21'42"
Secondary Affiliation: Universitat Autonoma de Barcelona, ESP, Spain
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200519
Program Name: ODPOcean Drilling Program
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal