干旱区生态环境知识资源中心(Arid): Early Holocene Indian summer monsoon and its impact on vegetation in the Central Himalaya: Insight from delta D and delta C-13 values of leaf wax lipid

Arid

DOI	10.1177/0959683620908639
	Early Holocene Indian summer monsoon and its impact on vegetation in the Central Himalaya: Insight from delta D and delta C-13 values of leaf wax lipid
	Ghosh, Sambit; Sanyal, Prasanta; Roy, Sohom; Bhushan, Ravi; Sati, S. P.; Philippe, Anne; Juyal, Navin
通讯作者	Ghosh, S
来源期刊	HOLOCENE
ISSN	0959-6836
EISSN	1477-0911
出版年	2020
卷号	30 期号:7 页码:1063-1074
英文摘要	Increase in rainfall during the early Holocene has been reported from different regions of Indian subcontinent, although the magnitude shows spatial variability with lower change in higher rainfall regions and vice versa. While the early-Holocene rainfall records are available from lowland areas of the Indian sub-continent, the record is poorly documented from the high-altitude Central Himalayan region where orography plays an important role in the spatial variability in the rainfall pattern. For the first time, delta D-C29, delta C-13(C29) values of alkane and delta C-13 values of organic matter from a relict lake of Benital area in the Central Himalaya have been used to reconstruct monsoonal rainfall and contemporary vegetation for last 10.5 ka with an emphasis on the early Holocene. The delta D-C29 values suggest that the early Holocene was characterized by a wet phase at ca. 9 ka with 25% higher rainfall compared to present while the middle-late-Holocene was relatively arid. The estimated increase in monsoonal rainfall for the early Holocene is the highest compared to the previous report from elsewhere. The magnitude of early-Holocene rainfall estimated in this study suggests that in addition to erosion of the bed-rocks at the head-water region, increased stream power reworked the older floodplain and resulted in 2.3 times higher sediment discharged into the Ganges-Brahmaputra (GB) delta compared to the present discharge. The delta C-13(C29) values of the lake sediments suggest a transition from woody to non-woody plant assemblages occurred at 7 ka. The poor correlation between delta D-C29 and delta C-13(C29) values suggests at higher rainfall, the delta C-13(C29) values of catchment vegetation were less responsive.
英文关键词	C-3 plants lake sediments organic matter orographic rainfall stable isotope
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000534054000001
WOS关键词	CARBON-ISOTOPE COMPOSITION ; SOIL ORGANIC-MATTER ; HYDROGEN ISOTOPES ; LAKE-SEDIMENTS ; ARABIAN SEA ; RIVER-BASIN ; C-4 PLANTS ; PRECIPITATION ; DISCRIMINATION ; RECORDS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324502
作者单位	[Ghosh, Sambit; Sanyal, Prasanta; Roy, Sohom] Indian Inst Sci Educ & Res Kolkata, Dept Earth Sci, Mohanpur 741246, India; [Sanyal, Prasanta] Indian Inst Sci Educ & Res Kolkata, Ctr Climate & Environm Studies, Mohanpur, India; [Bhushan, Ravi; Juyal, Navin] Phys Res Lab, Ahmadabad, Gujarat, India; [Sati, S. P.] VCSG Uttarakhand Univ Hort & Forestry, Dept Environm Sci, Bharsar, India; [Philippe, Anne] Univ Nantes, Lab Math Jean Leray, Nantes, France
推荐引用方式 GB/T 7714	Ghosh, Sambit,Sanyal, Prasanta,Roy, Sohom,et al. Early Holocene Indian summer monsoon and its impact on vegetation in the Central Himalaya: Insight from delta D and delta C-13 values of leaf wax lipid[J],2020,30(7):1063-1074.
APA	Ghosh, Sambit.,Sanyal, Prasanta.,Roy, Sohom.,Bhushan, Ravi.,Sati, S. P..,...&Juyal, Navin.(2020).Early Holocene Indian summer monsoon and its impact on vegetation in the Central Himalaya: Insight from delta D and delta C-13 values of leaf wax lipid.HOLOCENE,30(7),1063-1074.
MLA	Ghosh, Sambit,et al."Early Holocene Indian summer monsoon and its impact on vegetation in the Central Himalaya: Insight from delta D and delta C-13 values of leaf wax lipid".HOLOCENE 30.7(2020):1063-1074.