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Centennial- to decadal-scale monsoon precipitation variations in the upper Hanjiang River region, China over the past 6650 years
Tan, Liangcheng1,2,3; Cai, Yanjun1,2; Cheng, Hai2,4; Edwards, Lawrence R.4; Gao, Yongli5; Xu, Hai1,2,6; Zhang, Haiwei2; An, Zhisheng1
2018-01-15
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
Volume482Issue:2018Pages:580-590
SubtypeArticle
AbstractThe upper Hanjiang River region is the recharge area of the middle route of South-to-North Water Transfer Project. The region is under construction of the Hanjiang-Weihe River Water Transfer Project in China. Monsoon precipitation variations in this region are critical to water resource and security of China. In this study, high-resolution monsoon precipitation variations were reconstructed in the upper Hanjiang River region over the past 6650 years from delta O-18 and delta C-13 records of four stalagmites in Xianglong cave. The long term increasing trend of stalagmite delta O-18 record since the middle Holocene is consistent with other speleothem records from monsoonal China. This trend follows the gradually decreasing Northern Hemisphere summer insolation, which indicates that solar insolation may control the orbital-scale East Asian summer monsoon (EASM) variations. Despite the declined EASM intensity since the middle Holocene, local precipitation may not have decreased remarkably, as revealed by the delta C-13 records. A series of centennial- to decadal-scale cyclicity was observed, with quasi-millennium-, quasi-century-, 57-, 36- and 22-year cycles by removing the long-term trend of stalagmite delta O-18 record. Increased monsoon precipitation during periods of 4390-3800 a BP, 3590-2960 a BP, 2050-1670 a BP and 1110-790 a BP had caused four super-floods in the upper reach of Hanjiang River. Dramatically dry climate existed in this region during the 5.0 ka and 2.8 ka events, coinciding with notable droughts in other regions of monsoonal China. Remarkably intensified and southward Westerly jet, together with weakened summer monsoon, may delay the onset of rainy seasons, resulting in synchronous decreasing of monsoon precipitation in China during the two events. During the 4.2 ka event and the Little Ice Age, the upper Hanjiang River region was wet, which was similar to the climate conditions in central and southern China, but was the opposite of drought observed in northern China. We propose that weakened summer monsoon and less strengthened or normal Westerly jet may cause rain belt stay longer in the southward region, which reduced rainfall in northern China but enhanced it in central and southern China. (C) 2017 Elsevier B.V. All rights reserved.
KeywordMonsoon Precipitation Hanjiang River Holocene Abrupt Events Stalagmite
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.epsl.2017.11.044
WOS KeywordASIAN SUMMER MONSOON ; ANNUALLY-LAYERED STALAGMITE ; TRACE-ELEMENT DISTRIBUTION ; ICE-AGE TERMINATIONS ; HIGH-RESOLUTION ; NORTHERN CHINA ; CLIMATE-CHANGE ; EAST-ASIA ; VEGETATION HISTORY ; LAST DEGLACIATION
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000423892400055
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5185
Collection现代环境研究室
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
2.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China
3.JCGCS, Beijing 100875, Peoples R China
4.Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA
5.Univ Texas San Antonio, Dept Geol Sci, Ctr Water Res, San Antonio, TX 78249 USA
6.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
Recommended Citation
GB/T 7714
Tan, Liangcheng,Cai, Yanjun,Cheng, Hai,et al. Centennial- to decadal-scale monsoon precipitation variations in the upper Hanjiang River region, China over the past 6650 years[J]. EARTH AND PLANETARY SCIENCE LETTERS,2018,482(2018):580-590.
APA Tan, Liangcheng.,Cai, Yanjun.,Cheng, Hai.,Edwards, Lawrence R..,Gao, Yongli.,...&An, Zhisheng.(2018).Centennial- to decadal-scale monsoon precipitation variations in the upper Hanjiang River region, China over the past 6650 years.EARTH AND PLANETARY SCIENCE LETTERS,482(2018),580-590.
MLA Tan, Liangcheng,et al."Centennial- to decadal-scale monsoon precipitation variations in the upper Hanjiang River region, China over the past 6650 years".EARTH AND PLANETARY SCIENCE LETTERS 482.2018(2018):580-590.
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