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Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years
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...
Autores principales: | , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4674685/ https://www.ncbi.nlm.nih.gov/pubmed/26602034 http://dx.doi.org/10.1038/ncomms10018 |
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author | 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 DeLong, Kristine L. Elderfield, Henry Shen, Chuan-Chou |
author_facet | 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 DeLong, Kristine L. Elderfield, Henry Shen, Chuan-Chou |
author_sort | Liu, Yi |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-4674685 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46746852015-12-21 Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years 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 DeLong, Kristine L. Elderfield, Henry Shen, Chuan-Chou Nat Commun Article 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. Nature Pub. Group 2015-11-25 /pmc/articles/PMC4674685/ /pubmed/26602034 http://dx.doi.org/10.1038/ncomms10018 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article 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 DeLong, Kristine L. Elderfield, Henry Shen, Chuan-Chou Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years |
title | Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years |
title_full | Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years |
title_fullStr | Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years |
title_full_unstemmed | Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years |
title_short | Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years |
title_sort | obliquity pacing of the western pacific intertropical convergence zone over the past 282,000 years |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4674685/ https://www.ncbi.nlm.nih.gov/pubmed/26602034 http://dx.doi.org/10.1038/ncomms10018 |
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