Water Quality dataset, Great Barrier Reef

Each collection station is denoted by date, latitude and longitude. The data were sampled at several depths at each site: the number of samples was primarily, but not always, dependent on bottom-depth. A unique identifier has been assigned to each replicate.Variables: depth, dissolved inorganic phosphate (DIP), silicate, ammonium, nitrite, nitrate, dissolved inorganic nitrogen (DIN), dissolved organic carbon (DOC), temperature, salinity, particulate nitrogen (PN), particulate phosphorus (PP), particulate organic carbon (POC), zooplankton, total dissolved nitrogen (TDN), total dissolved phosphorus (TDP), Chlorophyll a, phaeophytin, Secchi disk. Weather information is recorded on swell and wind.Information about the methods used are in the Data Quality section of this metadata record. To collect information about water quality on the Great Barrier Reef. To assist in better defining the range of conditions within which reefs normally exist and the extreme conditions likely to cause significant changes in biological reef communities. Chlorophyll a, PP, PN and Secchi data have been used for the e-Atlas: http://e-atlas.org.auData plot checks by year revealed seemingly abnormally high values of nitrogen-based parameters 1976-1987 with typical values >10 times those of later years. Since many other variables had no data for this period, the data for all parameters was restricted to the period 1988 to current.Methods are summarised in the data quality section of this metadata record.每个采样站位均以日期、纬度及经度进行标识。各站位均于多个深度层级开展采样：样本数量主要（但并非绝对）取决于底床水深。每份重复样本均分配有唯一标识符。观测变量包括：深度、溶解态无机磷（DIP）、硅酸盐、铵态氮、亚硝酸盐、硝酸盐、溶解态无机氮（DIN）、溶解态有机碳（DOC）、水温、盐度、颗粒态氮（PN）、颗粒态磷（PP）、颗粒态有机碳（POC）、浮游动物、总溶解态氮（TDN）、总溶解态磷（TDP）、叶绿素a、脱镁叶绿素、赛氏盘。数据集记录有涌浪与风力相关的气象信息。本元数据记录的数据质量章节中记载了所用采样方法的相关信息。本数据集旨在收集大堡礁的水环境质量信息，以助力更精准地界定珊瑚礁正常生存的环境条件范围，以及可能引发珊瑚礁生物群落发生显著变化的极端环境条件。叶绿素a、颗粒态磷（PP）、颗粒态氮（PN）及赛氏盘数据已被用于e-Atlas平台：http://e-atlas.org.au。按年份对数据绘图进行核查后发现，1976年至1987年期间的氮类参数数值看似异常偏高，其典型值约为后续年份的10倍以上。由于该时段内多数其他变量无有效观测数据，因此所有参数的有效数据均被限定在1988年至今的时间段内。采样方法的概述内容可见于本元数据记录的数据质量章节。