Water physics and chemistry data from bottle casts from the CHESAPEAKE L/S and other platforms from 01 January 1957 to 31 December 1957 (NODC Accession 7000291)

Water physics and chemistry data were collected from bottle casts from the CHESAPEAKE L/S and other platforms from 01 January 1957 to 31 December 1957. Data were submitted by the National Marine Fisheries Service (NMFS). Data were processed by NODC to the NODC standard F004 Water Physics and Chemistry format. Full format description is available from NODC at www.nodc.noaa.gov/General/NODC-Archive/f004.html.

The F004 format is used for data from measurements and analyses of physical and chemical characteristics of the water column. Among chemical parameters that may be recorded are salinity, PH, and concentration of oxygen, ammonia, nitrate, phosphate, chlorophyll, and suspended solids. Physical parameters that may be recorded include temperature, density (sigma-t), transmissivity, and current velocity (east-west and north-south components). Cruise and station information, including environmental conditions of the study site at the time of observations, is also included.

本数据集的海水物理化学数据采集于1957年1月1日至1957年12月31日期间，通过切萨皮克L/S（CHESAPEAKE L/S）及其他平台的采水瓶采样获取。数据由美国国家海洋渔业局（National Marine Fisheries Service, NMFS）提交，并由国家海洋数据中心（National Oceanographic Data Center, NODC）按照NODC标准F004海水物理化学数据格式完成处理。完整格式说明可通过NODC官方网站www.nodc.noaa.gov/General/NODC-Archive/f004.html查询获取。

F004格式用于存储水柱物理与化学特征的测量及分析数据。可记录的化学参数包括盐度、pH值、溶解氧、氨、硝酸盐、磷酸盐、叶绿素及悬浮固体浓度；可记录的物理参数则涵盖温度、密度（σ-t）、透射率以及海流流速（东西向与南北向分量）。此外，数据集还包含航次与站位信息，其中包括观测时刻研究区域的环境条件。