Sedimentary responses to the sea level and Indian summer monsoon changes in the central Bay of Bengal since 40 ka

doi:10.1016/j.margeo.2019.05.006

	Sedimentary responses to the sea level and Indian summer monsoon changes in the central Bay of Bengal since 40 ka
	Li, Jingrui 1,2; Liu, Shengfa 1,2; Shi, Xuefa 1,2; Zhang, Hui 1; Fang, Xisheng 1; Cao, Peng 1,2; Yang, Gang 1,2; Xue, Xinru 1; Khokiattiwong, Somkiat 3; Kornkanitnan, Narumol 3
刊名	MARINE GEOLOGY
	2019-09
卷号	415
关键词	Sedimentary record Terrigenous provenance Paleoproductivity Sea level Indian summer monsoon Bay of Bengal
ISSN号	0025-3227
DOI	10.1016/j.margeo.2019.05.006
英文摘要	We present a sedimentary multi-index comprehensive study on sediment core BoB-56 collected from the central Bay of Bengal (BoB) with an attempt to understand the sedimentary processes and their responses to sea level change and the Indian summer monsoon (ISM) since the last glacial period. We revealed the temporal evolution of terrigenous input and provided a brief discussion of the implications of our sedimentary indexes for ocean productivity. Then, we proposed a simple depositional model in the central BoB since the last glacial period. As indicated by the geochemistry, mineralogy and physical indexes, including linear sedimentary rate (LSR), Ti/Ca, Rb/Sr and quartz/calcite ratios, the terrigenous input was higher during the last glacial period than during the Holocene period, and the sea level is suggested to be responsible for this significant distinction through the depositional center transition in the BoB at the glacial-interglacial scale. Similar terrigenous input patterns with solar radiation and precipitation before 18 ka indicated that the monsoon controlled these situations at precession-related scales. Synchronous changes with records in the north Atlantic Ocean during the last deglaciation and early Holocene suggested terrigenous input responses to the climate changes that also recorded by high latitude sedimentary system at millennial scales. Indicated by the element (CaCO3, Ba and Sr) authigenic accumulation rates, the paleoproductivity in the central BoB was at a roughly equivalent level during the last glacial period and the Holocene period. Different terrestrial nutrient inputs and ISM-related ocean surface stratifications were suggested to be responsible for the level of paleoproductivity. This study provides a brief understanding of the sedimentary response to the climate and emphasizes the different roles of the sea level and ISM in the central BoB.
资助项目	China Postdoctoral Science Foundation[2017M622112]
WOS关键词	TRACE-ELEMENT GEOCHEMISTRY ; BRAHMAPUTRA RIVER SYSTEM ; LATE QUATERNARY ; PROVENANCE DISCRIMINATION ; NORTHERN-HEMISPHERE ; SURFACE SEDIMENTS ; ISOTOPIC EVIDENCE ; CLIMATE CONTROL ; CLAY-MINERALS ; CHINA SEA
WOS研究方向	Geology ; Oceanography
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000481723500003
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/30092]
专题	自然资源部第一海洋研究所
通讯作者	Shi, Xuefa
作者单位	1.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China 3.Marine & Coastal Resources Res & Dev Inst, Dept Marine & Coastal Resources, Bangkok 10210, Thailand
推荐引用方式 GB/T 7714	Li, Jingrui,Liu, Shengfa,Shi, Xuefa,et al. Sedimentary responses to the sea level and Indian summer monsoon changes in the central Bay of Bengal since 40 ka[J]. MARINE GEOLOGY,2019,415.
APA	Li, Jingrui.,Liu, Shengfa.,Shi, Xuefa.,Zhang, Hui.,Fang, Xisheng.,...&Kornkanitnan, Narumol.(2019).Sedimentary responses to the sea level and Indian summer monsoon changes in the central Bay of Bengal since 40 ka.MARINE GEOLOGY,415.
MLA	Li, Jingrui,et al."Sedimentary responses to the sea level and Indian summer monsoon changes in the central Bay of Bengal since 40 ka".MARINE GEOLOGY 415(2019).