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• W2894173840 endingPage "143" @default.
• W2894173840 startingPage "134" @default.
• W2894173840 abstract "Variations in n-alkanes proxies (L/H, C31/C27 and ACL), molecular abundances of n-alkanes and stable carbon isotopic compositions of n-alkanes (δ13Calk) from the core STD235 (20°21.15′N, 118°22.56′E) have been used to trace characterize the climatic changes that occurred in the northern South China Sea (SCS) during the last glacial period. The ratio of low to high molecular-weight n-alkanes (L/H) and the concentration of n-alkanes indicated that organic matters in the sediments were derived from the mixture of both marine and terrestrial sources, but dominated by marine autochthonous input over the past 20 ka. Total n-alkanes were higher during the last glacial stage relative to the interglacial stage, implying the low sea level and the strengthened East Asian winter monsoon (EAWM) during the glacial time. The δ13Calk data indicated that the terrestrial plants on the adjacent continent of the present study area were dominated by C3 plants during the Holocene and experienced the expansion of C4 plants during the last glacial period. This similar result can be proved by the chain length parameter of n-alkanes (C31/C27, ACL) and the content of the herb pollen. In addition, n-alkanes distributions and C4 vegetation proportion calculated by δ13C of long-chain n-alkanes in the core STD235 recorded a short arid duration paralleled by the Heinrich event 1. Thereby we deduced that the occurrence of the dry event and the variation of regional vegetation community at the adjacent lands of the northern SCS were likely under the influence of the climate change emanated from the boreal high-latitudes." @default.
• W2894173840 created "2018-10-05" @default.
• W2894173840 creator A5018818692 @default.
• W2894173840 creator A5043542554 @default.
• W2894173840 creator A5048060417 @default.
• W2894173840 creator A5085025467 @default.
• W2894173840 date "2019-03-01" @default.
• W2894173840 modified "2023-10-18" @default.
• W2894173840 title "n-Alkanes as indicators of climate and vegetation variations since the last glacial period recorded in a sediment core from the northeastern South China Sea (SCS)" @default.
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• W2894173840 doi "https://doi.org/10.1016/j.jseaes.2018.09.018" @default.
• W2894173840 hasPublicationYear "2019" @default.
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