DOI: 10.1016/j.palaeo.2017.09.008
论文题名: Holocene Indian Summer Monsoon variation inferred from geochemical and grain size records from Lake Ximenglongtan, southwestern China
作者: Ning D. ; Zhang E. ; Sun W. ; Chang J. ; Shulmeister J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
语种: 英语
英文关键词: Element geochemistry
; Holocene droughts
; Lake sediment record
; Monsoon precipitation
; Solar forcing
英文摘要: Identifying Holocene Indian Summer Monsoon (ISM) variability and its possible mechanism is critical for predicting future environmental changes. In this study, we present a well-dated, ca. 9.4. kyr geochemical and grain size record derived from Lake Ximenglongtan, southwestern China. The record depicts the Holocene ISM evolution and multi-decadal to centennial abrupt precipitation change events superimposed on the long-term climate changes. The results indicate that precipitation was high during the first half of the Holocene from ca. 9.4 to 4.5. cal. kyr B.P. but decreased over the later Holocene. On the multi-decadal to centennial time scale, our results show that a pronounced and prolonged drought event occurred between 7.6 and 7.0. cal. kyr B.P. In addition, several other low precipitation events occurred at about 8.9, 6.3, 5.2, 4.2, 3.7, 2.5 and 1.7. cal. kyr B.P., which correspond well with reported intervals of abrupt ISM weakening events. Our findings suggest that changes in solar activity may have primarily controlled the fluctuations of ISM intensity on the multi-decadal to centennial time-scale. Cooling of the North Atlantic climate and the interactions between tropical-ocean and atmosphere may have amplified the solar signal. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68105
Appears in Collections: 过去全球变化的重建
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作者单位: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences. 73 Beijing E Rd, Xuanwu, Nanjing, Jiangsu, China, 210008; University of Chinese Academy of Sciences, Beijing 100049, China; School of Earth and Environmental Sciences, The University of Queensland, St Lucia, Brisbane, Qld, 4072, Australia
Recommended Citation:
Ning D.,Zhang E.,Sun W.,et al. Holocene Indian Summer Monsoon variation inferred from geochemical and grain size records from Lake Ximenglongtan, southwestern China[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01