Pore fluids in Dead Sea sediment core reveal linear response of lake chemistry to global climate changes
Pore fluids in Dead Sea sediment core reveal linear response of lake chemistry to global climate changes
复制标题
死海沉积物核心的孔隙流体揭示了湖泊化学对全球气候变化的线性响应
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
O. Sivan
中科院分区：
文献类型：
--
作者：
E. Levy;M. Stein;B. Lazar;I. Gavrieli;Y. Yechieli;O. Sivan
在多国和国际大陆科学钻探计划(ICDP)共同赞助的死海末端底部工作框架内，从456m沉积物岩心中提取的孔隙流体记录了过去220K.Y.年来深湖的化学变化。Mg2+和Br2-在孔隙流体中是保守的，在间冰期浓度增加，在冰期稀释，为深湖净水平衡的变化提供了良好的指标。此外，Na/Cl比值还记录了这些水文变化导致的盐岩沉淀和溶解过程。Mg2+和Br2-的记录遵循冰期-间冰期的模式，例如在大气CO2浓度和全球海面温度中观察到的，尽管存在相位偏移。在末次间冰期末期(约116ka)，深湖的稀释开始延迟，这很可能是由于湖泊学从全混期向亚冰期的转变。由于在较冷的年轻仙女座时期向深湖输入淡水，导致末次冰期第一次冰川终止时深湖浓度的增加被推迟。分水岭的降水与北大西洋海面温度之间存在着持久的关系，这与过去仪器记录中观察到的情况类似。与长期趋势的偏离发生在间冰期，海洋同位素阶段MIS5e和MIS1，此时深海死海被显著稀释，并与地中海腐泥层S5和S1重合。
Pore fluids extracted from a 456 m sediment core, recovered within the framework of a multinational and International Continental Scientific Drilling Program (ICDP) co-sponsored effort at the bottom of the terminal Dead Sea, recorded the chemical variations in the deep lake over the past 220 k.y. Mg 2+ and Br – were shown to be conservative in the pore fluids, increasing in concentration during interglacial periods, diluting during glacials, and providing excellent proxies for deep lake net water balance changes. Furthermore, the Na/Cl ratio recorded the process of halite precipitation and dissolution induced by these hydrological changes. Mg 2+ and Br – records follow a glacial-interglacial pattern, such as observed in atmospheric CO 2 concentrations and global sea-surface temperatures, albeit with a phase offset. At the end of the last interglacial (ca. 116 ka), there is a delay in onset of dilution of the deep lake, most likely due to the limnological transition from holomictic to meromictic conditions. The increase in deep lake concentrations at Last Glacial Termination I is delayed as a result of freshwater input into the deep lake during the cooler Younger Dryas period. There is a persistent relationship between precipitation in the watershed and North Atlantic sea-surface temperatures, similar to conditions observed over the past instrumental record. Deviations from the long-term trends occurred during interglacial periods, Marine Isotope Stages MIS 5e and MIS 1, when the deep Dead Sea was significantly diluted, and coincided with Mediterranean sapropel layers S5 and S1.
来自死海深部沉积物微相分析的黎凡特末次冰期早期（～ 117â75 ka）期间的水文气候变化
影响因子：
4.3
作者：
Neugebauer;Schwab;Waldmann;Tjallingii;Hadzhiivanova;Naumann;A. Brauer
通讯作者：
A. Brauer
ICDP 死海深钻项目 (DSDDP) 恢复的长沉积物记录的岩性
影响因子：
4
作者：
Neugebauer;Brauer;Schwab;Waldmann;Kitagawa;Torfstein;Dulski;Ariztegui;Ben-Avraham;Goldstein
通讯作者：
Goldstein