Response of upper ocean structure to the initiation of the North Hemisphere glaciation in the South China Sea

Planktonic foraminifer as well as oxygen and carbon isotopic records from Ocean Drilling Project Core 1146, located at the northern continental slope of the South China Sea, were used to study the response of the upper water column structure to the formation and progressive intensification of the No...

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Bibliographic Details
Published in:Palaeogeography, Palaeoclimatology, Palaeoecology
Main Authors: Huang, BQ, Cheng, XR, Jian, ZM, Wang, PX
Other Authors: Huang, BQ (reprint author), Peking Univ, Coll Environm Sci, Dept Geog, Beijing 100871, Peoples R China., Peking Univ, Coll Environm Sci, Dept Geog, Beijing 100871, Peoples R China., Tongji Univ, Lab Marine Geol, Shanghai 200092, Peoples R China.
Format: Journal/Newspaper
Language:English
Published: palaeogeography palaeoclimatology palaeoecology 2003
Subjects:
Northern Hemisphere glaciation
oxygen and carbon isotopes
planktonic foraminifera
South China Sea
upper water column structure
PLANKTONIC-FORAMINIFERA
SURFACE TEMPERATURES
PROGRESSIVE INTENSIFICATION
BENTHIC FORAMINIFERA
EQUATORIAL PACIFIC
WESTERN PACIFIC
PLIOCENE
HISTORY
PALEOCEANOGRAPHY
CIRCULATION
Pacific
Neogloboquadrina pachyderma
Planktonic foraminifera
Online Access:https://hdl.handle.net/20.500.11897/158646
https://doi.org/10.1016/S0031-0182(03)00458-9
Description
Summary:Planktonic foraminifer as well as oxygen and carbon isotopic records from Ocean Drilling Project Core 1146, located at the northern continental slope of the South China Sea, were used to study the response of the upper water column structure to the formation and progressive intensification of the Northern Hemisphere glaciation during the Late Pliocene (3.2-2.0 Ma). Variations in the relative abundance of the Globigerinoides ruber, Globigerinoides sacculifer, Globorotalia menardii, and Globorotalia inflata groups, Globorotalia crassaformis and Neogloboquadrina pachyderma showed that sea surface temperatures gradually decreased, coinciding with heavier oxygen isotope values at 2.8, 2.72 2.6 2.5 2.16, and 2.08 Ma. After 2.7 Ma, the relative abundance of mixed-layer species decreased, while that of thermocline dwellers, dominated by high productivity species, increased. Deltadelta(13)C variations among G. sacculifer, Pulleniatina obliquiloculata and Cibicidoides wuellerstorfi suggest that the mixed-layer depth and vertical exchange was enhanced with the strenghtening of the East Asian winter monsoon, which in turn is associated with the progressive intensification of the Northern Hemisphere glaciation. (C) 2003 Elsevier Science B.V. All rights reserved. Geography, Physical Geosciences, Multidisciplinary Paleontology SCI(E) 0 ARTICLE 3-4 305-318 196

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