A millennial scale planktonic foraminifer record of the mid-Pleistocene climate transition from the northern South China Sea

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doi: 10.1016/j.palaeo.2005.04.018
Author(s): Zheng Fan; Li Qianyu; Li Baohua; Chen Muhong; Tu Xia; Tian Jun; Jian Zhimin
Author Affiliation(s): Primary:
Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou, China
Other:
Tongji University, China
Volume Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source: Palaeogeography, Palaeoclimatology, Palaeoecology, 223(3-4), p.349-363. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 CODEN: PPPYAB
Note: In English. Appendix available online. 46 refs.; illus., incl. 1 table, sketch map
Summary: A high resolution record (∼1100 yr) of planktonic foraminifers from ODP Site 1144 in the northern South China Sea reveals rapid and strongly variable climatic changes during the mid-Pleistocene transition period. The abundance of warm water species decreased from an average of 60% in marine isotope stage (MIS) 29 to <40% at MIS 22, followed by a steady increase in cool water species toward younger intervals. Many deep dwelling, warm water species decreased to a minimum during MIS 22 and remained extremely rare or even became absent in younger glacial intervals, indicating stepwise sea surface cooling in the region. Estimated SSTs show large fluctuations mostly at glacial-interglacial transitions. A maximum winter temperature difference of 11°C (17-28°C) across MIS 23/22 boundary likely corresponded to a major growth of boreal ice sheets across the MPT center at 0.9 myr, coupled with a strengthened winter monsoon over East Asia. The MPT event not only led to a better correlation between changes in species abundances and glacial-interglacial cycles but also a more constrained thermocline that shoaled considerably during subsequent glacial periods. The oxygen isotope record and the abundance of shallow water species display power spectra closely in pace with the 41,000 and 100,000 years cyclicities. A lower coherence over these cyclicities between deep-water dwelling species and the planktonic δ18O, a shoaled thermocline, and more positive glacial δ18O together suggest disturbances of surface and subsurface waters by intensified winter monsoons over the last 1.1-0.5 myr in the South China Sea. Abstract Copyright (2005) Elsevier, B.V.
Year of Publication: 2005
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Biostratigraphy; Cenozoic; Climate change; Cores; Cycles; Foraminifera; Glacial environment; Glacial geology; Glaciation; Glaciomarine environment; Globigerinacea; Globigerinidae; Globigerinoides; Globigerinoides ruber; Globigerinoides sacculifer; Globorotalia; Globorotalia inflata; Globorotalia menardii; Globorotalia truncatulinoides; Globorotaliidae; High-resolution methods; Ice sheets; Interglacial environment; Invertebrata; Leg 184; Marine environment; Microfossils; Middle Pleistocene; Monsoons; Neogloboquadrina; Neogloboquadrina pachyderma; North Pacific; Northwest Pacific; ODP Site 1144; Ocean Drilling Program; Pacific Ocean; Paleo-oceanography; Paleoclimatology; Paleoecology; Planktonic taxa; Pleistocene; Protista; Quaternary; Rotaliina; South China Sea; Sphaeroidinella; Thermocline; West Pacific
Coordinates: N200311 N200311 E1172508 E1172508
Record ID: 2005055451
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands