Relocation of the Yellow River as revealed by sedimentary isotopic and elemental signals in the East China Sea
Relocation of the Yellow River as revealed by sedimentary isotopic and elemental signals in the East China Sea
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东海沉积同位素和元素信号揭示黄河的迁移
DOI：
10.1016/j.marpolbul.2009.03.019
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发表时间：
2009-06-01
影响因子：
5.8
通讯作者：
Yang, Junhong
中科院分区：
文献类型：
--
作者：
Yang, Weifeng;Chen, Min;Yang, Junhong
黄河为我国北方边缘海提供了大量的营养盐和淡水，并对边缘海的生态系统和流态产生了重要影响。利用北方东海沉积物特征论证了1855年南黄海长江口向渤海的迁移。同位素（δ C-13，δ N-15）信号和有机质（OM）中的C/N比表明，在1750年之前，沉积物的OM的主要来源是陆地。1855年以后，海洋有机物的特征为海洋源。在1855年以前，马兰黄土中的常量元素（Al、Ti、Fe、Mn）和微量元素（Ni、Cr、Cu、Pb）与马兰黄土的关系更为密切，因为90%以上的YR沉积物是黄土来源的。这些结果表明，在过去的250年里，YR的搬迁引起了北方中国海的当前模式的显着变化：然而，需要更多的研究，以进一步探讨这些联系。(C)2009爱思唯尔有限公司版权所有。
The Yellow River (YR) supplies a large amount of nutrients and fresh water to the northern Chinese marginal seas, and greatly influences the ecosystem and current patterns. The relocation of the YR outlet from the southern Yellow Sea (YS) to the Bohai Sea in 1855 was demonstrated using northern East China Sea (ECS) sediment characteristics. Both isotopic (delta C-13, delta N-15) signals and C/N ratios in the organic matter (OM) indicate that prior to 1750, the predominant source of OM to the sediments was terrestrial. The terrestrial influences continuously weakened until 1855, when the YR estuary moved: after 1855, the OM was characterized by oceanic sources. Major elements (Al, Ti, Fe, Mn) and trace elements (Ni, Cr, Cu, Pb) had a much closer association with Malan loess prior to 1855, as >90% of the YR sediment was loess-derived. These results reveal that the relocation of the YR induced significant changes in the current patterns of the northern China Seas in the last 250 years: however, more studies are needed to further examine these linkages. (C) 2009 Elsevier Ltd. All rights reserved.