U.S. Geological Survey, 345 Middlefield Rd., Menlo Park, California 94025, USA.
Sci Data. 2017 Aug 8;4:170098. doi: 10.1038/sdata.2017.98.
The U.S. Geological Survey (USGS) maintains a place-based research program in San Francisco Bay (USA) that began in 1969 and continues, providing one of the longest records of water-quality measurements in a North American estuary. Constituents include salinity, temperature, light extinction coefficient, and concentrations of chlorophyll-a, dissolved oxygen, suspended particulate matter, nitrate, nitrite, ammonium, silicate, and phosphate. We describe the sampling program, analytical methods, structure of the data record, and how to access all measurements made from 1969 through 2015. We provide a summary of how these data have been used by USGS and other researchers to deepen understanding of how estuaries are structured and function differently from the river and ocean ecosystems they bridge.
美国地质调查局（USGS）在美国旧金山湾（USA）开展了一项基于地点的研究计划，该计划始于 1969 年并持续至今，为北美河口地区水质测量提供了最长的记录之一。组成部分包括盐度、温度、光衰减系数以及叶绿素-a、溶解氧、悬浮颗粒物、硝酸盐、亚硝酸盐、铵、硅酸盐和磷酸盐的浓度。我们描述了采样计划、分析方法、数据记录的结构以及如何访问自 1969 年至 2015 年所做的所有测量。我们提供了一份摘要，说明这些数据如何被 USGS 和其他研究人员用来加深对河口结构和功能的理解，这些河口与它们连接的河流和海洋生态系统不同。
