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Mid-Pliocene Asian monsoon intensification and the onset of Northern Hemisphere glaciation

Zhang Yige, Ji Junfeng, William Balsam, Liu Lianwen and Chen Jun
Mid-Pliocene Asian monsoon intensification and the onset of Northern Hemisphere glaciation
Geology (Boulder) (July 2009) 37 (7): 599-602

Abstract

The late Pliocene onset of major Northern Hemisphere glaciation (NHG) is one of the most important steps in the Cenozoic global cooling. Although most attempts have been focused on high-latitude climate feedbacks, no consensus has been reached in explaining the forcing mechanism of this dramatic climate change. Here we present a key low-latitude climate record, the high-resolution Asian monsoon precipitation variability for the past five million years, reconstructed from South China Sea sediments. Our results, with supporting evidence from other records, indicate significant mid-Pliocene Asian monsoon intensification, preceding the initiation of NHG at ca. 2.7 Ma ago. This 1.4-million-year-long monsoon intensification probably enhanced monsoon-induced Asian continental erosion and chemical weathering and in the process left fingerprints in marine calcium isotopes. Furthermore, increased rock weathering and/or organic carbon burial probably lowered the contemporary atmospheric CO (sub 2) and may have triggered the NHG onset.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 37
Serial Issue: 7
Title: Mid-Pliocene Asian monsoon intensification and the onset of Northern Hemisphere glaciation
Affiliation: Nanjing University, State Laboratory for Mineral Deposits Research, Nanjing, China
Pages: 599-602
Published: 200907
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 40
Accession Number: 2009-072259
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2009140
Illustration Description: illus.
N09°21'43" - N09°21'43", E113°17'07" - E113°17'07"
Secondary Affiliation: University of Texas, Arlington, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200939
Program Name: ODPOcean Drilling Program
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