DOI: 10.1016/j.palaeo.2013.05.025
论文题名: Mid-late Holocene monsoonal variations from mainland Gujarat, India: A multi-proxy study for evaluating climate culture relationship
作者: Prasad V. ; Farooqui A. ; Sharma A. ; Phartiyal B. ; Chakraborty S. ; Bhandari S. ; Raj R. ; Singh A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 397 起始页码: 38
结束页码: 51
语种: 英语
英文关键词: Climate culture
; Harappan civilization
; Mainland Gujarat
; Mid-Holocene
; Paleoclimate
英文摘要: A multi-proxy study involving palynology, phytoliths, sedimentology, clay mineralogy, carbon isotopes and magnetic mineralogy was carried out on Wadhwana Lake sediments from sub-humid zone of mainland Gujarat to determine the mid-Holocene climatic fluctuations, and its possible impact on the Harappan culture. The 1.03m sediment profile of Wadhwana Lake shows five paleoclimatic phases. The study reveals high lake stand during Phase I (~7500-5560calyrBP). A considerable cool and moist climatic condition during Phase I is inferred due to the presence of pollen belonging to wet evergreen taxa and high phytolith climatic index 'Ic'. Later part of Phase I show gradual replacement of evergreen to deciduous pollen taxa, decrease in Ic value and dominance of smectite over kaolinite, indicating a reduction in wet climatic condition due to decline in the precipitation and prevalence of seasonally dry climate. However, a large variety of Madhuca, Meliaceae, Asteraceae pollen taxa, abundant fresh-water algae Chrozophora and Ceralia pollen in this period provides evidence of intensified arboriculture and agricultural activity. Low lake level and dry climate have been documented during Phase II (5560 to ~4255calyrBP) and are synchronous with the lake records of western Indian region. High values of phytolith aridity index Iph, high primary minerals, increase in the δ13C values provide evidence for excessive dry climatic conditions at ~4255calyrBP. Phase III shows a gradual strengthening of SW monsoon after ~3500calyrBP. Phase IV shows a short pulse of dry climatic conditions (~3238 to ~2709calyrBP) followed by somewhat similar to present day climate for Phase V. The study concludes that onset of dry climate after 5500calyrBP is a regionally spread synchronous event that has been documented in several lake records of western India. It is surmised that the urbanization in Harappan civilization in North West India was coincident with the initial phase of declining rainfall of mid-Holocene. The emergence of cultural complexity of Harappan civilization should be seen as an initial adaptation to earliest phase of environmental deterioration and its subsequent decline is probably linked with the changing seasonality pattern and excessive dry climate of later phase (~4200-4255calyrBP) of mid-Holocene. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69445
Appears in Collections: 过去全球变化的重建
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作者单位: Birbal Sahni Institute of Palaeobotany, Lucknow, India; Indian Institute of Tropical Meteorology, Pune, India; Department of Earth and Environmental Science, Kachchh University, Bhuj, India; Department of Geology, Faculty of Science, MS University of Vadodara, Vadodara, India; Central University of Himachal Pradesh, India
Recommended Citation:
Prasad V.,Farooqui A.,Sharma A.,et al. Mid-late Holocene monsoonal variations from mainland Gujarat, India: A multi-proxy study for evaluating climate culture relationship[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,397