Current direction, marine toxic substances, and wind wave spectra data from moored current meter casts and other instruments in the Gulf of Mexico as part of the Brine Disposal project, 15 September 1977 - 30 June 1979 (NODC Accession 7900295)

Current direction, marine toxic substances, and wind wave spectra data were collected using moored current meter casts and other instruments in the Gulf of Mexico from September 15, 1977 to June 30, 1979. Data were submitted by Texas A&M University as part of the Brine Disposal project. Data has been been processed by NODC to the standard NODC F005- Current Meter Data, F144- Marine Toxic Substances, and F191- Wave Wind Spectra formats. Full format descriptions are available from NODC homepage at http://www.noaa.nodc.gov.

The F005 format is used for time series measurements of ocean currents obtained using moored current-measuring instruments, principally Aanderaa current meters (manufactured by Aanderaa Instruments Inc.). These data represent the Eulerian method of current measurement, i.e., the meters are deployed at a fixed mooring point and measure flow past the sensor. Position, water depth, and sensor depth are reported for each station. The data record comprises values of current direction and speed at specified date and time. Data values may be subject to
averaging or filtering and are typically reported at 10-15 minute time intervals. Other environmental parameters may also be reported. These include: water temperature, salinity, conductivity, and transmissivity; wind direction and speed; and dominant wave direction, height, and period. A text field is available for optional comments.

The F144 format contains data on ambient concentrations of toxic substances and other pollutants in the marine environment. The data derive from laboratory analyses of samples of water, sediment, or marine organisms. Samples may have been collected near marine discharge sites or during ocean monitoring surveys of large areas. Field observations of tar deposits on beaches may also be reported. Survey information includes platform type, start and end dates, and investigator and institution. If data are collected near a discharge site, discharge location, depth, distance to shore, average volume, and other characteristics are reported. Position, date, time and environmental conditions are reported for each sample station. Environmental data may include meteorological and sea surface conditions, tide stage and height, depth of the thermocline or mixed layer surface temperature and salinity, and wave height and periods. Sample characteristics, collection methods, and laboratory techniques are reported for each sample collected and analyzed. The data record comprises concentration values (or a code to indicate trace amounts) for each chemical substance analyzed. Chemical substances are identified by codes based on the registry numbers assigned by the Chemical Abstracts Service (CAS) of the American Chemical Society. Marine organisms from which samples have been taken are identified using the 12-digit NODC Taxonomic Code. A text record is available for optional comments.

The F191 format is used to report meteorological data and ocean wave spectra data from NDBO. The format contains seven data record types to: 1) Identify the buoy for position, duration, rate of sampling and heading. 2) Identify the meteorological parameters (temperature, pressure, weather, solar radiation, and surface waves). 3) Report time series frequency, density and resolution of waves. Each record is 120 characters in length, sorted by station and record type. The first nine columns for all records are to be used for file type (columns 1-3) and file identifier (column 4-9). The file identifier, to be assigned by the originator, is an unique originator id for each data submission. After submission, the NODC reassigns to this field an unique NODC identifier for internal use.

1977年9月15日至1979年6月30日期间，研究团队于墨西哥湾（Gulf of Mexico）通过锚定海流计投放及其他仪器设备，采集了海流方向、海洋有毒物质以及风浪谱数据。该数据集由得克萨斯农工大学（Texas A&M University）作为盐水处置项目（Brine Disposal project）的一部分提交。美国国家海洋数据中心（National Oceanographic Data Center, NODC）已将数据处理为标准格式：F005-海流计数据、F144-海洋有毒物质数据以及F191-风浪谱数据。完整的格式说明可从NODC官网http://www.noaa.nodc.gov获取。

F005格式用于记录通过锚定海流测量仪器获取的海流时间序列数据，主流设备为安德拉海流计（Aanderaa current meters，由Aanderaa Instruments Inc.制造）。此类数据采用欧拉法（Eulerian method）进行海流测量，即仪器部署于固定锚点，测量流经传感器的流体运动。每个测站均记录位置、水深及传感器埋设深度。数据记录包含指定日期与时间下的海流方向与流速数值。数据值可经过平均或滤波处理，通常以10至15分钟的时间间隔进行上报。此外还可记录其他环境参数，包括：水温、盐度、电导率与透射率；风向与风速；以及主波向、波高与波周期。同时预留文本字段用于添加可选备注。

F144格式用于存储海洋环境中有毒物质及其他污染物的环境浓度数据。数据来源于对水样、沉积物样品或海洋生物样本的实验室分析。样本可采集自海洋排放点附近或大范围海洋监测调查区域，也可包含海滩焦油沉积的现场观测记录。调查信息包括平台类型、调查起止日期、调查人员及所属机构。若数据采集于排放点附近，则需记录排放位置、排放深度、离岸距离、平均排放量及其他相关特征。每个样本测站均记录位置、日期、时间及环境条件，环境数据可涵盖气象与海表状况、潮汐水位与潮高、温跃层深度或混合层表层温度与盐度，以及波高与波周期。每份采集并分析的样本均需记录样本特征、采集方法及实验室分析技术。数据记录包含每种分析化学物质的浓度数值（或用于标识痕量含量的代码）。化学物质通过美国化学学会（American Chemical Society）化学文摘社（Chemical Abstracts Service, CAS）分配的登记号进行标识。采集样本的海洋生物采用12位NODC分类代码进行标识。同时预留文本记录字段用于添加可选备注。

F191格式用于上报来自国家数据浮标观测系统（National Data Buoy Observatory, NDBO）的气象数据与海浪谱数据。该格式包含七种数据记录类型：1） 标识浮标信息，包括位置、观测时长、采样频率与航向；2） 标识气象参数，包括气温、气压、天气状况、太阳辐射与海浪参数；3） 上报海浪的时间序列频率、密度与分辨率。每条记录长度为120个字符，按测站与记录类型排序。所有记录的前九列用于存储文件类型（第1-3列）与文件标识符（第4-9列）。文件标识符由数据提交方分配，为每次数据提交分配唯一的提交方标识。数据提交后，NODC将为该字段重新分配唯一的内部使用NODC标识符。