The evolution of (17)O-excess in surface water of the arid environment during recharge and evaporation.
The evolution of (17)O-excess in surface water of the arid environment during recharge and evaporation.
复制标题
DOI：
10.1038/s41598-018-23151-6
复制
发表时间：
2018-03-21
影响因子：
4.6
通讯作者：
Staubwasser M
中科院分区：
文献类型：
--
作者：
Surma J;Assonov S;Herwartz D;Voigt C;Staubwasser M
这项研究表明，三重O同位素的潜力，量化蒸发与补给的盐湖从阿塔卡马沙漠，智利。蒸发梯度被发现在浅池塘沿着地下水流路径从地下水源。总溶解固体（TDS）增加了177 g/l沿着，δ 18 O增加了16.2‰，δD增加了65‰。过量17 O减少79微克，过量D减少55‰。相对湿度（h）、入流蒸发量（E/I）、蒸汽同位素组成（*RV）和入流水同位素组成（*RWI）决定了17 O-过量δ 18 O沿着定义明确的蒸发曲线的同位素分布，正如经典Craig-Gordon模型预测的那样。在TDS、δ 18 O和17 O过量分别变化392 g/l、25.0‰和−130/meg的情况下，进行了补充性现场简单（锅）蒸发实验，以确定缓慢盐水蒸发和风湍流的影响。这些影响转化为E/I的不确定性，而不是h。*RV相对于 *RWI的局部组成预先确定了分辨h变化的一般能力。三重O-同位素系统是有用的定量湖泊水文平衡和古湿度重建，特别是如果D/H分析的补充。
This study demonstrates the potential of triple O-isotopes to quantify evaporation with recharge on a salt lake from the Atacama Desert, Chile. An evaporative gradient was found in shallow ponds along a subsurface flow-path from a groundwater source. Total dissolved solids (TDS) increased by 177 g/l along with an increase in δ18O by 16.2‰ and in δD by 65‰. 17O-excess decreased by 79 per meg, d-excess by 55‰. Relative humidity (h), evaporation over inflow (E/I), the isotopic composition of vapor (*RV) and of inflowing water (*RWI) determine the isotope distribution in 17O-excess over δ18O along a well-defined evaporation curve as the classic Craig-Gordon model predicts. A complementary on-site simple (pan) evaporation experiment over a change in TDS, δ18O, and 17O-excess by 392 g/l, 25.0‰, and −130 per meg, respectively, was used to determine the effects of sluggish brine evaporation and of wind turbulence. These effects translate to uncertainty in E/I rather than h. The local composition of *RV relative to *RWI pre-determines the general ability to resolve changes in h. The triple O-isotope system is useful for quantitative hydrological balancing of lakes and for paleo-humidity reconstruction, particularly if complemented by D/H analysis.
登录
查看更多内容
影响因子：
2
作者：
Barkan, Eugeni;Luz, Boaz
通讯作者：
Luz, Boaz
影响因子：
2
作者：
Barkan, E;Luz, B
通讯作者：
Luz, B
影响因子：
5
作者：
Li, Shuning;Levin, Naomi E.;Chesson, Lesley A.
通讯作者：
Chesson, Lesley A.
影响因子：
6.4
作者：
FRITZ, P;SUZUKI, O;SALATI, E
通讯作者：
SALATI, E
影响因子：
5
作者：
Passey, Benjamin H.;Hu, Huanting;Levin, Naomi E.
通讯作者：
Levin, Naomi E.