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Dynamics of the intertropical convergence zone over the western Pacific during the Little Ice Age
Yan, Hong1,2; Wei, Wei3; Soon, Willie4; An, Zhisheng1,2; Zhou, Weijian1,2; Liu, Zhonghui5; Wang, Yuhong1; Carter, Robert M.6
2015-04-01
Source PublicationNATURE GEOSCIENCE
ISSN1752-0894
Volume8Issue:4Pages:315-320
SubtypeArticle
Abstract

Precipitation in low latitudes is primarily controlled by the position of the intertropical convergence zone, which migrates from south to north seasonally. The Little Ice Age (defined as AD 1400-1850) was associated with low solar irradiance and high atmospheric aerosol concentrations as a result of several large volcanic eruptions. The mean position of the intertropical convergence zone over the western Pacific has been proposed to have shifted southwards during this interval, which would lead to relatively dry Little Ice Age conditions in the northern extent of the intertropical convergence zone and wet conditions around its southern limit. However, here we present a synthesis of palaeo-hydrology records from the Asian-Australian monsoon area that documents a rainfall distribution that distinctly violates the expected pattern. Our synthesis instead documents a synchronous retreat of the East Asian Summer Monsoon and the Australian Summer Monsoon into the tropics during the Little Ice Age, a pattern supported by the results of our climate model simulation of tropical precipitation over the past millennium. We suggest that this pattern over the western Pacific is best explained by a contraction in the latitudinal range over which the intertropical convergence zone seasonally migrates during the Little Ice Age. We therefore propose that rather than a strict north-south migration, the intertropical convergence zone in this region may instead expand and contract over decadal to centennial timescales in response to external forcing.

WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1038/NGEO2375
WOS KeywordSummer Monsoon Variability ; Holocene Asian Monsoon ; Last Millennium ; Tropical Pacific ; Climate Variability ; South China ; Sea ; Record ; Coral ; Lake
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000352082300024
PublisherNATURE PUBLISHING GROUP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9338
Collection古环境研究室
Corresponding AuthorYan, Hong
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Joint Ctr Global Change Studies JCGS, Beijing 100875, Peoples R China
3.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, D-27570 Bremerhaven, Germany
4.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
5.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
6.Inst Publ Affairs, Melbourne, Vic 3000, Australia
Recommended Citation
GB/T 7714
Yan, Hong,Wei, Wei,Soon, Willie,et al. Dynamics of the intertropical convergence zone over the western Pacific during the Little Ice Age[J]. NATURE GEOSCIENCE,2015,8(4):315-320.
APA Yan, Hong.,Wei, Wei.,Soon, Willie.,An, Zhisheng.,Zhou, Weijian.,...&Carter, Robert M..(2015).Dynamics of the intertropical convergence zone over the western Pacific during the Little Ice Age.NATURE GEOSCIENCE,8(4),315-320.
MLA Yan, Hong,et al."Dynamics of the intertropical convergence zone over the western Pacific during the Little Ice Age".NATURE GEOSCIENCE 8.4(2015):315-320.
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