DOI: 10.1016/j.quascirev.2014.07.008
Scopus记录号: 2-s2.0-84904915549
论文题名: Analysis of vegetation and climate change during Late Pleistocene from Ziro Valley, Arunachal Pradesh, Eastern Himalaya region
作者: Bhattacharyya A. ; Mehrotra N. ; Shah S.K. ; Basavaiah N. ; Chaudhary V. ; Singh I.B.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 101 起始页码: 111
结束页码: 123
语种: 英语
英文关键词: Isotope
; Late Quaternary
; LGM
; Magnetic susceptibility
; MIS-3
; Pollen
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Finite difference method
; Isotopes
; Magnetic susceptibility
; Peat
; Atmospheric thermodynamics
; Carbon
; Isotopes
; Magnetic susceptibility
; Magnetism
; Peat
; Temperature
; Vegetation
; Late Pleistocene
; Late quaternary
; LGM
; Low temperatures
; MIS-3
; Monsoon intensity
; Monsoon precipitation
; Pollen
; Variable density
; Vegetation
; Climate change
; climate variation
; magnetic susceptibility
; peat
; Pleistocene
; population density
; precipitation (climatology)
; savanna
; temperature effect
; altitude
; biogeographical region
; carbon isotope
; climate effect
; marine isotope stage
; montane forest
; palynology
; treeline
; vegetation cover
; Arunachal Pradesh
; Himalayas
; India
; Ziro Valley
; Coniferophyta
; Poaceae
; Quercus
英文摘要: Vegetation and climate during later part of Late Pleistocene have been reconstructed from Ziro valley, Arunachal Pradesh, Eastern Himalaya based on pollen data along with carbon isotope and magnetic susceptibility data The study reveals that the area and the vicinity is occupied by mixed broad leaved - conifer forest and pine grass savanah at variable densities at least since 66,000yrBP. The phases of expansions and declines of Oaks with decline and increase of Pines and grasses probably occurred under increase (warm-moist) and decrease (cool-dry) of S.W. monsoon precipitation respectively. The increasing trend of S.W. monsoon and temperature is recorded during ~44,000 to 34,000calyrBP synchronizing with the peat development, and which peaked at around 35,000calyrBP. This may link to the interstadial phase during the last major glacial cycle in the Himalayan region. It is also reflected in the decline of δ13C value indicating dominance of C-3 type of vegetation. The increased values of χFD%, and lower values χLF magnetic susceptibility, recorded during the phase of the peat deposit, further advocate's higher monsoon intensity. Impact of expansion of glacier felt with peak (LGM) around 20,000calyrBP is perceived. Tree line had moved to lower altitudes due to increased aridity and low temperature. During this time existence of savannah type of vegetation is also evident by the increase of C4 taxa. Decreased FD% and increased χLF susceptibility also indicate reduced S.W. monsoon intensity. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60164
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, Uttar Pradesh, India; Indian Institute of Geomagnetism, Navi Mumbai, Maharashtra, India; Ministry of Earth Sciences, Prithivi Bhawan, New Delhi, India; Centre of Advanced Studies in Geology, Lucknow University, Lucknow, Uttar Pradesh, India
Recommended Citation:
Bhattacharyya A.,Mehrotra N.,Shah S.K.,et al. Analysis of vegetation and climate change during Late Pleistocene from Ziro Valley, Arunachal Pradesh, Eastern Himalaya region[J]. Quaternary Science Reviews,2014-01-01,101