U.S. Geological Survey Oceanographic Time Series Data Collection

The oceanographic time series data collected by U.S. Geological Survey scientists and collaborators are
served in an online database at http://stellwagen.er.usgs.gov/index.html. These data were collected as
part of research experiments investigating circulation and sediment transport in the coastal ocean. The
experiments (projects, research programs) are typically one month to several years long and have been
carried out since 1975. New experiments will be conducted, and the data from them will be added to the
collection. As of 2016, all but one of the experiments were conducted in waters abutting the U.S. coast;
the exception was conducted in the Adriatic Sea. Measurements acquired vary by site and experiment;
they usually include current velocity, wave statistics, water temperature, salinity, pressure, turbidity,
and light transmission from one or more depths over a time period. The measurements are concentrated
near the sea floor but may also include data from the water column.
The user interface provides an interactive map, a tabular summary of the experiments, and a separate
page for each experiment. Each experiment page has documentation and maps that provide details of what
data were collected at each site. Links to related publications with additional information about the
research are also provided. The data are stored in Network Common Data Format (netCDF) files using the
Equatorial Pacific Information Collection (EPIC) conventions defined by the National Oceanic and
Atmospheric Administration (NOAA) Pacific Marine Environmental Laboratory. NetCDF is a general,
self-documenting, machine-independent, open source data format created and supported by the University
Corporation for Atmospheric Research (UCAR). EPIC is an early set of standards designed to allow
researchers from different organizations to share oceanographic data. The files may be downloaded or
accessed online using the Open-source Project for a Network Data Access Protocol (OPeNDAP). The OPeNDAP
framework allows users to access data from anywhere on the Internet using a variety of Web services
including Thematic Realtime Environmental Distributed Data Services (THREDDS). A subset of the data
compliant with the Climate and Forecast convention (CF, currently version 1.6) is also available.

美国地质调查局（U.S. Geological Survey）科学家及其合作者采集的海洋学时间序列数据，已托管于在线数据库http://stellwagen.er.usgs.gov/index.html。这些数据是针对近海环流与沉积物输运开展的研究实验的采集成果。相关实验（项目、研究计划）的持续时长通常为1个月至数年不等，且自1975年起便已启动实施。未来将开展新的实验，其采集的数据也将纳入该数据集。截至2016年，除一项实验外，其余所有实验均在美国沿岸海域开展，唯一的例外实验场地位于亚得里亚海。不同实验与观测站点的采集内容存在差异，通常包含多深度层在一段时间内的流速、波浪统计特征、海水温度、盐度、压力、浊度及光透射率。观测数据多集中于近海底区域，但也可能涵盖水柱中的相关数据。
该数据库的用户界面提供交互式地图、实验项目的表格摘要，以及每个实验专属的详情页面。每个实验页面均配有说明文档与地图，可展示各站点采集的数据详情。此外，页面还提供相关研究出版物的链接，以提供更多研究背景信息。数据以网络通用数据格式（Network Common Data Format，netCDF）存储，并遵循美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，NOAA）太平洋海洋环境实验室制定的赤道太平洋信息收集（Equatorial Pacific Information Collection，EPIC）规范。网络通用数据格式（netCDF）是由大学大气研究联合会（University Corporation for Atmospheric Research，UCAR）研发并维护的通用、自描述、与机器无关的开源数据格式。EPIC则是一套早期制定的标准，旨在帮助不同机构的研究人员共享海洋学数据。用户可下载数据文件，或通过网络数据访问协议开源项目（Open-source Project for a Network Data Access Protocol，OPeNDAP）在线访问数据。OPeNDAP框架支持用户通过各类Web服务（包括主题实时环境分布式数据服务（Thematic Realtime Environmental Distributed Data Services，THREDDS））从互联网任意位置获取数据。此外，该数据集还提供符合气候与预报公约（Climate and Forecast convention，CF，当前版本为1.6）的子集数据。