Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years
| Type | Article | ||||||||||||||||
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| Date | 2015-11 | ||||||||||||||||
| Language | English | ||||||||||||||||
| Author(s) | Liu Yi1, 2, 3, Lo Li2, Shi Zhengguo3, 4, Wei Kuo-Yen2, Chou Chien-Ju2, Chen Yi-Chi2, Chuang Chih-Kai2, Wu Chung-Che2, Mii Horng-Sheng5, Peng Zicheng1, Amakawa Hiroshi2, Burr George S.2, 6, Lee Shih-Yu7, Delong Kristine L.8, Elderfield Henry9, Shen Chuan-Chou2 | ||||||||||||||||
| Affiliation(s) | 1 : Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China. 2 : Natl Taiwan Univ, Dept Geosci, High Precis Mass Spectrometry & Environm Change L, Taipei 10617, Taiwan. 3 : Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China. 4 : CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China. 5 : Natl Taiwan Normal Univ, Dept Earth Sci, Taipei 11677, Taiwan. 6 : Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. 7 : Acad Sinica, Res Ctr Environm Changes, Taipei 11529, Taiwan. 8 : Louisiana State Univ, Dept Geog & Anthropol, Baton Rouge, LA 70803 USA. 9 : Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England. |
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| Source | Nature Communications (2041-1723) (Nature Publishing Group), 2015-11 , Vol. 6 , P. - | ||||||||||||||||
| DOI | 10.1038/ncomms10018 | ||||||||||||||||
| WOS© Times Cited | 61 | ||||||||||||||||
| 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. | ||||||||||||||||
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