Coral geochemical record of submarine groundwater discharge back to 1870 in the northern South China Sea
Coral geochemical record of submarine groundwater discharge back to 1870 in the northern South China Sea
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南海北部1870年海底地下水排放的珊瑚地球化学记录
DOI：
10.1016/j.palaeo.2018.05.045
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Xu Shendong
中科院分区：
文献类型：
--
作者：
Jiang Wei;Yu Kefu;Song Yinxian;Zhao Jian xin;Feng Yue xing;Wang Yinghui;Xu Shendong
海底地下水排放(SGD)的重要性日益受到人们的重视，因为它作为溶解物种的来源具有潜在的意义。为了探索可能的珊瑚地球化学信号，并验证潜在的可靠指标的有效性，在过去的137 年中，从南海区北部一个地下河口附近的一个孔口中鉴定了多个地球化学指标，据报道，该地区是陆地水向沿海海洋的主要通量。结果表明，由于岩溶区地下水流动过程中发生的各种溶解反应，海岸带SGD是微量元素的主要来源，特别是REE和BA。珊瑚地球化学指标与局地/区域降水的时间和频域对比表明，珊瑚REE/Ca值主要受与局地降水有关的SGD的影响，而珊瑚的Ba/Ca值还受初级生产力和来自周边地区的异地海水的影响。利用珊瑚的REE信号，我们可以重建1870-2006年三亚沿岸表层海水的REE浓度和SGD速率。这项研究提供了一种新的方法来开发沿海水域历史SGD的替代物，证明了具有大SGD的岩溶海岸的珊瑚REE/Ca记录具有潜在的古水文指标的潜力。
The importance of submarine groundwater discharge (SGD) is becoming increasingly recognized because of its potential significance as a source of dissolved species. To explore the probable coral geochemical signal of SGD and verify the validity of potential reliable proxies, multiple geochemical proxies over the last 137 years were identified from aPoritescoral near a subterranean estuary in the northern South China Sea, where the SGD was reported to be the predominant flux of terrestrial waters to the coastal ocean. Results indicated that the SGD in the coastal zone was the dominant source of trace elements, especially REE and Ba, due to the various dissolution reactions occurring during groundwater flow in the karst terrain. The time- and frequency-domain comparison between the coral geochemical proxy and the local/regional precipitation indicated that coral REE/Ca ratios are predominantly impacted by the SGD associated with local precipitation, while coral Ba/Ca ratios are also affected by the primary productivity and allochthonous seawater Ba from surrounding areas. The REE signal from coral allows us to reconstruct the coastal surface seawater REE concentrations and the SGD rates on the coast of Sanya during 1870–2006. In a novel approach to developing a proxy for historic SGD to coastal waters, this study provides evidence that the coral REE/Ca record from the karst coast with large SGD has potentials to be a promising paleohydrological indicator.
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影响因子：
5.3
作者：
W. Moore
通讯作者：
W. Moore
影响因子：
5
作者：
K. Johannesson;K. Stetzenbach;V. Hodge
通讯作者：
K. Johannesson;K. Stetzenbach;V. Hodge
DOI：
10.1016/j.scitotenv.2011.06.017
发表时间：
2011-09
期刊：
The Science of the total environment
影响因子：
--
作者：
Ni Su;Jinzhou Du;W. Moore;Sumei Liu;Jing Zhang
通讯作者：
Ni Su;Jinzhou Du;W. Moore;Sumei Liu;Jing Zhang
不同PDO背景下华南初夏季风降水的年际变化
DOI：
10.1002/joc.2129
发表时间：
2011-05
期刊：
International Journal of Climatology
影响因子：
--
作者：
Mao, Jiangyu;Chan, Johnny C. L.;Wu, Guoxiong
通讯作者：
Wu, Guoxiong
影响因子：
3.4
作者：
G. Horta-Puga;J. Carriquiry
通讯作者：
G. Horta-Puga;J. Carriquiry