Cyclic water level oscillations of the KaraBogazGol-Caspian Sea system
Cyclic water level oscillations of the KaraBogazGol-Caspian Sea system
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DOI：
10.1016/s0012-821x(03)00259-0
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发表时间：
2003-07-15
影响因子：
5.3
通讯作者：
Gasse, F
中科院分区：
文献类型：
--
作者：
Giralt, S;Julià, R;Gasse, F
KaraBogazGol（KBG）水位振荡重建在过去的200年中使用的地球化学演化的最高米的沉积填充。对KBG沉积物矿物组成的高分辨率研究表明，高浓度盐水交替出现，之后是较稀的沃茨。相对水位重建是基于统计模型（因子分析（FA），对应分析（CA）和去趋势对应分析（DCA）），而年代框架建立使用Pb-210技术。将重建结果与里海的仪器水位记录进行了比较，显示出高度的相关性（r（2）= 0.83）。里海的重建和测量的水位振荡之间的协议表明，环境变化可以重建封闭的湖泊，提供了一个准确的沉积过程的时序控制。水位重建表明，里海水位波动遵循一个周期性的模式，而不是一个'不稳定'的，因为已经在文献中提出。两个主要的周期62.5年和38.46年已被发现。（C）2003爱思唯尔科学B.V.版权所有。
The KaraBogazGol (KBG) water level oscillations were reconstructed in the last 200 years using the geochemical evolution of the uppermost meter of its sedimentary infill. High-resolution studies of the mineralogical composition of the KBG sediments show alternating periods of high concentration brines followed by periods of more dilute waters. The relative water level reconstruction was based on statistical models (factor analysis (FA), correspondence analyses (CA) and detrended correspondence analyses (DCA)) whilst the chronological framework was established using the Pb-210 technique. This reconstruction was compared with the instrumental water level record of the Caspian Sea, showing a high degree of correlation (r(2) = 0.83). The agreement between the reconstructed and the measured water level oscillations of the Caspian Sea indicates that environmental changes can be reconstructed from closed lakes provided that an accurate chronological control of sedimentary processes is available. The water level reconstruction shows that the Caspian Sea water level fluctuations follow a cyclical pattern rather than an 'erratic' one, as has been suggested in the literature. Two main periodicities of 62.5 and 38.46 years have been found. (C) 2003 Elsevier Science B.V. All rights reserved.