Millennial-scale climate fluctuations revealed by records of color reflectance from ODP Site 1144 in the northern South China Sea

Author(s): Huang Wei; Jian Zhimin; Buhring, C.
Author Affiliation(s): Primary:
Tongji University, Key Laboratory of Marine Geology, Shanghai, China
Other:
Kiel University, Federal Republic of Germany
Volume Title: Haiyang Dizhi yu Disiji Dizhi Marine Geology & Quaternary Geology
Source: Haiyang Dizhi yu Disiji Dizhi = Marine Geology & Quaternary Geology, 23(3), p.5-8. Publisher: Science Press, Beijing, China. ISSN: 0256-1492
Note: In Chinese with English summary. 6 refs.; illus., incl. 2 plates
Summary: Ocean Drilling Program (ODP) Site 1144 is located in the northern South China Sea (SCS). The age at a core depth of 517 m is about 1.0 Ma BP. Of all the physical property measurements, color reflectance (CR) data have the highest resolution, with an average value of <60 years (sometimes better than 10 years). Therefore, it is the ideal indicator for studying millennial-scale climate changes. Wavelet and cross-frequency analysis has let us know that in obliquity cycles, changes in CR and in oxygen isotopes of plankton Foraminifera are similar to each other, and eccentricity has been dominant for the last 700,000 years. Like the GISP2 ice records of Greeland, CR changes in the SCS also recorded D/O-like events. 3 ka and 1.5 ka periods were revealed through wavelet analysis of CR; they occurred not only in glacial periods (such as MIS 2-4, 6, 8), but also in interglacial periods (such as MIS 15, 17, 19, 25, etc.) and in terminal periods (such as MIS 11/12, 15/16). These signals have been much stronger in glacial periods than in interglacial periods over the last 700,000 years. This not only indicates the instability of the climate throughout the glacial/interglacial cycles, but also the climate transformation in the middle Pleistocene.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Cenozoic; Climate change; Cores; Glacial environment; Interglacial environment; Leg 184; Marine sediments; North Pacific; Northwest Pacific; ODP Site 1144; Ocean Drilling Program; Pacific Ocean; Paleoclimatology; Quaternary; Reflectance; Sediments; South China Sea; West Pacific
Coordinates: N200311 N200311 E1172508 E1172508
Record ID: 2009027035
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