Age model and Nd/Ca ratio of planktonic foraminifera from sediment core MD05-2925 off the Solomon Sea

  • L. Lo (Contributor)
  • Hiroshi Amakawa (Contributor)
  • C. C. Shen (Contributor)
  • Zhengguo Shi (Contributor)
  • K. Y. Wei (Contributor)
  • Kristine L. Delong (Contributor)
  • Yi Chi Chen (Contributor)
  • G. S. Burr (Contributor)
  • Horng-Sheng Mii (Contributor)
  • Chien Ju Chou (Contributor)
  • C. C. Wu (Contributor)
  • Chih Kai Chuang (Contributor)
  • Henry Elderfield (Contributor)
  • S. Y. Lee (Contributor)
  • Yi Liu (Contributor)
  • Zicheng Peng (Contributor)

Dataset

Description

Abstract: Abstract: The Intertropical Convergence Zone (ITCZ) encompasses the heaviest rain belt on the Earth. Few direct long-term records, especially in the Pacific, limit our understanding of long-term natural variability for predicting future ITCZ migration. Here we present a tropical precipitation record from the Southern Hemisphere covering the past 282,000 years, inferred from a marine sedimentary sequence collected off the eastern coast of Papua New Guinea. Unlike the precession paradigm expressed in its East Asian counterpart, our record shows that the western Pacific ITCZ migration was influenced by combined precession and obliquity changes. The obliquity forcing could be primarily delivered by a cross-hemispherical thermal/pressure contrast, resulting from the asymmetric continental configuration between Asia and Australia in a coupled East Asian-Australian circulation system. Our finding suggests that the obliquity forcing may play a more important role in global hydroclimate cycles than previously thought.

Category: geoscientificInformation

Source: Supplement to: Liu, Yi; Lo, Li; Shi, Zhengguo; Wei, Kuo-Yen; Chou, Chien-Ju; Chen, Yi-Chi; Chuang, Chih-Kai; Wu, Chung-Che; Mii, Horng-Sheng; Peng, Zicheng; Amakawa, Hiroshi; Burr, George S; Lee, Shih-Yu; Elderfield, Henry; Shen, Chuan-Chou (2015): Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years. Nature Communications, 6(1), https://doi.org/10.1038/ncomms10018

Supplemental Information: Not Availble

Coverage: EVENT LABEL: MD05-2925 (MD052925) * LATITUDE: -9.343500 * LONGITUDE: 151.460200 * DATE/TIME: 2005-06-22T00:00:00 * ELEVATION: -1661.0 m * Recovery: 28.43 m * LOCATION: Egum * CAMPAIGN: MD148 * BASIS: Marion Dufresne (1995) * METHOD/DEVICE: Calypso Corer II
Date made available2015 Nov 25
PublisherUnknown Publisher

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