Spatiotemporal shift in sulphide concentration in hypolimnic water column in Lake Hiruga, a saline lake in Japan
Spatiotemporal shift in sulphide concentration in hypolimnic water column in Lake Hiruga, a saline lake in Japan
复制标题
日本盐湖昼贺湖低沼泽水柱中硫化物浓度的时空变化
DOI：
10.1007/s10201-018-0541-7
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发表时间：
2018
期刊：
影响因子：
1.6
通讯作者：
A. Kaneda
中科院分区：
文献类型：
--
作者：
R. Kondo;M. Momoki;M. Yamamoto;A. Kaneda
对日本福井市水河湖盐湖水体中硫化物的时空分布进行了为期两年的研究。2014年4月至2016年3月期间，在适当深度定期采集了水样，并对水温、盐度和溶解氧浓度等物理化学参数进行了现场同步测量。硫化物从2014年9月开始在海底堆积，而这是在2015年6月。2014年和2015年，硫化物浓度在接近12月底时都有所增加。2015年4月和2016年2月，硫化物从海底消失。硫化物积累起始季节的差异与冬季环流期间次生离子中的DO浓度密切相关。在热层析期之前，DO浓度受水柱稳定性的调节。我们对研究两年中硫化物分布的分析表明，分层期间硫化物在海底的积累似乎与水柱在停滞期之前的冬春季水柱稳定性的强度有关。
A 2-year study was designed to investigate the spatiotemporal distribution of sulphide in the water column of a saline lake, Lake Hiruga in Fukui, Japan. Water samples were collected in Lake Hiruga periodically between April 2014 and March 2016 at appropriate depths with simultaneous in situ measurements of physicochemical parameters such as temperature, salinity and dissolved oxygen (DO) concentration. Sulphide started accumulating in the hypolimnion in September 2014, whilst that did in June 2015. The sulphide concentrations increased toward the end of December in both 2014 and 2015. Then the sulphide disappeared from the hypolimnion in April 2015 and February 2016. The difference in starting season of the sulphide accumulation was closely connected with DO concentrations in the hypolimnion in circulation periods of winter season. The DO concentrations were regulated by water column stability before thermal stratification periods. Our analysis of the sulphide distribution for the 2 years of the study suggested that accumulation of sulphide in the hypolimnion during stratified periods appears to be associated with strength of water column stability in the winter-spring seasons before stagnant periods in Lake Hiruga.