globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.11.045
论文题名:
Monsoon variability over Peninsular India during Late Pleistocene: Signatures of vegetation shift recorded in terrestrial archive from the corridors of Western Ghats
作者: Srivastava G.; Trivedi A.; Mehrotra R.C.; Paudayal K.N.; Limaye R.B.; Kumaran K.P.N.; Yadav S.K.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 443
起始页码: 57
结束页码: 65
语种: 英语
英文关键词: Coexistence approach ; Fossils ; Konkan ; Northeast monsoon ; Quaternary ; Southwest monsoon
英文摘要: The fossil flora recovered from the Kangvai well, Ratnagiri District, Maharashtra (17°53'41″ N; 73°12'23″ E) has been used to reconstruct the monsoon variations and seasonal rainfall pattern during the Late Pleistocene (44,020 ± 390 years BP) by using the Coexistence Approach. The reconstruction suggests that the Southwest (SW) and Northeast monsoons (NE) contributed ~. 64% and 18% of the total rainfall, respectively. Moreover, the pre-monsoon showers were responsible for about 15% of the annual rainfall. As both SW and NE monsoons were very active, along with the pre-monsoonal rainfall, the length of rainy season increased and extended up to 9 months in a year favouring the evergreen continuum and prevalence of wet evergreen forests until the Late Glacial Maximum or slightly prior to it. However, due to the weakening of NE and pre-monsoon rainfall later in the Late Pleistocene and Early Holocene, the area experiences only four months of rainy season now on account of the present-day SW monsoon. These changes resulted in the extinction of wet evergreen taxa which are now endemic to the wetter parts of Western Ghats, from the fossil locality. Our reconstruction agrees with the previous studies from the Western Ghats suggesting that the wet evergreen taxa require < 4 months of dry season for their survival. This is the first quantitative rainfall reconstruction from India measuring the pre-monsoon, summer monsoon, post-monsoon and dry season from fluvio-lacustrine sediments. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68611
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作者单位: Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow, India; Central Department of Geology, Tribhuvan University, Kirtipur, Kathmandu, Nepal; Palynology and Palaeoclimate Laboratory, Palaeobiology Group, Agharkar Research Institute, G.G. Agarkar Road, Pune, India; Department of Geology, University of Lucknow, 53 University Road, Lucknow, India

Recommended Citation:
Srivastava G.,Trivedi A.,Mehrotra R.C.,et al. Monsoon variability over Peninsular India during Late Pleistocene: Signatures of vegetation shift recorded in terrestrial archive from the corridors of Western Ghats[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,443
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