Deep-sea pollen in the southern part of the South China Sea 3.0-2.0 Ma BP and its response to global climate change

Author(s): Yuan Jinhong; Luo Yunli; Xu Zhaoliang; Sun Xiangjun
Author Affiliation(s): Primary:
Chinese Academy of Sciences, Institute of Botany, Beijing, China
Other:
Tongji University, China
Volume Title: Haiyang Dizhi yu Disiji Dizhi Marine Geology & Quaternary Geology
Source: Haiyang Dizhi yu Disiji Dizhi = Marine Geology & Quaternary Geology, 25(3), p.75-81. Publisher: Science Press, Beijing, China. ISSN: 0256-1492
Note: In Chinese with English summary. 29 refs.; illus., incl. sketch map
Summary: A total of 146 pollen samples, with an average time resolution of 7000 ka at a depth of 135-95 m in deep-sea records from ODP Site 1143 (9°22'N, 113°17'E) in the southern South China Sea were analyzed to study the history of East Asian paleo-monsoon evolution and the response of vegetation in South China Sea areas to climate change around 2.5 Ma BP. The average time resolution is 7000 years. The results show the pollen influx experienced a distinct change. The average value of pollen influx during 2.6-2.0 Ma BP is different from that of 3.0-2.6 Ma BP and increased notably. This shows that sea level in the South China Sea fell distinctly at 2.6 Ma BP, which corresponds with the occurrence of the Northern Hemisphere Glaciation and the enhancement of the East Asian Monsoon. The correspondence of pollen influx changes with oxygen isotope stages represents many cycles of glaciation-interglaciation, indicating corresponding rises and falls of sea level of the South China Sea after 2.6 Ma BP. Results of spectral analysis show that 0.1 Ma (eccentricity) and 46.9 ka (obliquity) cycles existed during 3.0-2.0 Ma BP.
Year of Publication: 2005
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Cenozoic; Climate change; Deep-sea environment; Glacial environment; Global change; Interglacial environment; Leg 184; Marine environment; Marine sediments; Microfossils; Miospores; Neogene; North Pacific; Northwest Pacific; ODP Site 1143; Ocean Drilling Program; Pacific Ocean; Paleoclimatology; Palynomorphs; Pliocene; Pollen; Sea-level changes; Sediments; South China Sea; Tertiary; Upper Pliocene; West Pacific
Coordinates: N092143 N092143 E1131707 E1131707
Record ID: 2010002139
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.