时间序列沉积物捕获器(sediment trap)及其在青海湖的放置

Time-series sediment trap and a deployment in Lake Qinghai

沉积物捕获器在认识现代沉积过程方面具有独特的优势,已在海洋和国外一些大湖的研究中得到了成功的应用,但相关的工作在我国湖泊研究中尚未开展。Mark 8-13型时间序列沉积物捕获器是用来连续收集水体沉降颗粒物的仪器,可以获得沉积物输入通量和季节性变率。本文在介绍了该类型沉积物捕获器的设计、工作原理、投放和回收等基本知识的基础上,阐明了我们选择青海湖作为放置沉积物捕获器的理由和科学意义。在本专题的五篇论文中,我们展示了在青海湖放置的沉积物捕获器于2010年7月至2012年9月期间收集的沉积物和湖水样品的研究结果和同步的实时监测数据。通过在青海湖两年多的试验性地放置以及初步的结果,我们建议在我国典型内陆不同位置的湖泊等水体长期地放置这类沉积物捕获器,将为湖泊等水体系统的现代沉积和生物过程的深入理解提供全新的视角。

Static sediment traps have been successfully used to examine the modem processes of particle and organic fluxes and re-suspension in coastal systems and foreign large lakes, but no relevant work has carried out in inland lakes in China. McLane Mark 8-13 sediment trap is a time-series instrument that uses 13 cup sample bottles to collect settling particles in situ and to measure sample export flux and seasonal variability. In this paper, firstly, a brief introduction was given about the function, design, operation, and deployment and recovery of the sediment trap. Then, we stated the reasons why we chose Lake Qinghai for a pilot deployment of the sediment trap and its scientific significance. Finally, we presented some progresses from the time series samples of sediments and waters from Lake Qinghai collected during the July 2010 and September 2012 along with state-of-the-art sensing data, which were demonstrated in details in the following five papers. On the basis of the pilot deployment of the sediment trap in Lake Qinghai that offers a novel perspective to achieve a comprehensive knowledge of particle processes within the lake, we suggest that the Mark 8-13 time series sediment trap is worthy to be used extensively in inland water bodies at various geographical settings and at a long term.