Tian Jun; Wang Pinxian; Cheng Xinrong (2004): Responses of foraminiferal isotopic variations at ODP Site 1143 in the southern South China Sea to orbital forcing. Science in China Press, Beijing, China, Science in China. Series D, Earth Sciences, 47 (10), 943-953, georefid:2009-038765
Abstract:
Foraminiferal delta (super 18) O and delta (super 13) C records for the past 5 Ma at ODP Site 1143 reveal the linear responses of Plio-Pleistocene climate changes in the southern South China Sea to orbital forcing at the obliquity and precession bands. The phase of delta (super 18) O variations with orbital forcing is opposite that of delta (super 13) C, which may have been caused by the frequent El Nino events in the equatorial Pacific. The amplification of the Northern Hemisphere Ice Sheet at -3.3 Ma probably affected the development of the 100,000-year climate cycles. Its further spreading may have spurred the 100,000-year climate cycle to become the dominant cycle in the late Pleistocene. The "Mid-Pleistocene Transition" event had a localized influence on isotope variations in the southern South China Sea. Foraminiferal delta (super 13) C records for the past 5 Ma at Site 1143 are highly coherent with orbital forcing at the long eccentricity band, and lead delta (super 18) O records at the shorter eccentricity band, highlighting the importance of the carbon cycle in global climate change.
Coverage:
West: 113.1707 East: 113.1707 North: 9.2143 South: 9.2143
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