气候变化领域集成服务门户(CCPortal): Abrupt changes in Indian summer monsoon strength during the last ~900 years and their linkages to socio-economic conditions in the Indian subcontinent

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DOI	10.1016/j.palaeo.2019.109347
	Abrupt changes in Indian summer monsoon strength during the last ~900 years and their linkages to socio-economic conditions in the Indian subcontinent
	Gupta A.K.; Dutt S.; Cheng H.; Singh R.K.
发表日期	2019
ISSN	0031-0182
卷号	536
英文摘要	Abrupt shifts in Indian summer monsoon (ISM) precipitation largely affected regional hydrometeorology, accelerating socio-economic and cultural adaptations of agrarian economies in South Asia in the last millennium. Linking ISM variability to human history in the Indian subcontinent is still limited by the scarcity of high-resolution paleoclimatic data for the period encompassing the last 1000 years or earlier. We present a new high resolution oxygen isotope proxy record from the Wah Shikar cave, northeastern India and identified abrupt shifts in the ISM that had profound impact on human societies during the last ~900 yrs. The ISM was strong during the Medieval Climate Anomaly (MCA) and the Current Warm Period (CWP), and show multiple shifts during the Little Ice Age (LIA). The abrupt shifts in the ISM were more frequent during warm intervals, showing a secular trend with few exceptions during the cold periods. Intervals of prolonged summer monsoon weakening are correlated to the decline of major dynasties in India, possibly due to decrease in agriculture productivity, declining economy and societal crisis. Changes in atmospheric temperature due to volcanic eruptions and sun spot activity have played major role in the onset of the LIA and other prolonged weak intervals of the ISM during the last ~900 yrs. © 2019 Elsevier B.V.
英文关键词	Current Warm period; Indian dynasties; Little Ice Age; Maunder Minimum; Medieval Climate Anomaly
语种	英语
scopus关键词	air temperature; climate variation; Little Ice Age; Maunder Minimum; monsoon; oxygen isotope; paleoclimate; proxy climate record; sunspot; volcanic eruption; India
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150760
作者单位	Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, 721 302, India; Wadia Institute of Himalayan Geology, 33, General Mahadeo Singh Road, Dehradun, 248 001, India; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, 710049, China; Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, United States; School of Earth, Ocean and Climate Sciences, IIT Bhubaneswar, Bhubaneswar, 751007, India
推荐引用方式 GB/T 7714	Gupta A.K.,Dutt S.,Cheng H.,等. Abrupt changes in Indian summer monsoon strength during the last ~900 years and their linkages to socio-economic conditions in the Indian subcontinent[J],2019,536.
APA	Gupta A.K.,Dutt S.,Cheng H.,&Singh R.K..(2019).Abrupt changes in Indian summer monsoon strength during the last ~900 years and their linkages to socio-economic conditions in the Indian subcontinent.Palaeogeography, Palaeoclimatology, Palaeoecology,536.
MLA	Gupta A.K.,et al."Abrupt changes in Indian summer monsoon strength during the last ~900 years and their linkages to socio-economic conditions in the Indian subcontinent".Palaeogeography, Palaeoclimatology, Palaeoecology 536(2019).