Late Quaternary variations in planktonic foraminiferal assemblages and paleotemperature of the Ontong Java Plateau, West Pacific

Author(s): Jin Haiyan; Jian Zhimin; Liu Dongsheng
Author Affiliation(s): Primary:
Ocean University of China, Qingdao, China
Tongji University, China
Volume Title: Haiyang Dizhi yu Disiji Dizhi Marine Geology & Quaternary Geology
Source: Haiyang Dizhi yu Disiji Dizhi = Marine Geology & Quaternary Geology, 23(4), p.65-71. Publisher: Science Press, Beijing, China. ISSN: 0256-1492
Note: In Chinese with English summary. 18 refs.; illus.
Summary: Ocean Drilling Program Site 807 is located on the Ontong-Java Plateau, western equatorial Pacific. Quantitative analysis of planktonic Foraminifera, combined with oxygen and carbon isotope data, reveals glacial-interglacial variations in sea surface temperature and upper water vertical structure during the late Quaternary in this region. Our results indicate that, since 530 ka BP, sea surface temperature (SST) and the depth of the thermocline (DOT) have changed significantly in the West Pacific Warm Pool (WPWP). The average glacial-interglacial annual SST difference was up to 4.2°C, and DOT fluctuations could exceed 100 m, further suggesting the instability of the WPWP. Spectral analyses of SST and DOT reveal two dominating cyclicities: typical 100 ka glacial-interglacial periodicity and some semi-processions found only in the tropics, indicating that late Quaternary paleo-oceanographic changes in the study area have been influenced not only by high latitude forcing but also by tropic-driving factors.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Assemblages; Cenozoic; Foraminifera; Glacial environment; Interglacial environment; Invertebrata; Leg 130; Marine environment; Microfossils; ODP Site 807; Ocean Drilling Program; Ontong Java Plateau; Pacific Ocean; Paleo-oceanography; Paleoclimatology; Paleoecology; Paleotemperature; Planktonic taxa; Protista; Quaternary; Sea-surface temperature; Thermocline; Upper Quaternary; West Pacific; West Pacific Warm Pool
Coordinates: N033622 N033626 E1563730 E1563728
Record ID: 2009027063
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