June 2002 CTD, PAR, oxygen and chlorophyll profiles for the Georgia Coastal Ecosystems Altamaha River transect

Four hydrographic surveys were performed on June 20, 2002, along an east-to-west transect up the Altamaha River in Georgia (Altamaha River Transect, GCE-AL). Vertical CTD profiles were collected at 1-2km intervals from the line of demarcation (station +00) to 28km upriver along the transect during low and high tidal regimes. Conductivity, temperature, pressure, optical back scatter, photosynthetically-available radiation, oxygen and chlorophyll a fluorescence were measured, and depth, salinity and sigma-t were calculated for each profile. Data values collected during the upcast were deleted. This data set was collected as part of the Georgia Coastal Ecosystems LTER quarterly hydrographic monitoring program.

2002年6月20日，于佐治亚州阿尔塔马哈河开展4次水文勘测，沿该河上游布设东西向测线断面，该数据集命名为阿尔塔马哈河断面（Altamaha River Transect, GCE-AL）。在低潮及高潮潮汐时段，沿该断面从分界站位（station +00）向上游延伸28公里的范围内，以1~2公里的间隔采集垂直温盐深仪（CTD, Conductivity, Temperature, Depth）剖面数据。本次测量获取了电导率、温度、压力、光学后向散射、光合有效辐射、溶解氧及叶绿素a荧光等参数，并为每条剖面计算得到水深、盐度及西格玛-t（sigma-t）数值。温盐深仪上行测量过程中采集的数据已被剔除。该数据集为佐治亚海岸生态系统长期生态研究（LTER, Long-Term Ecological Research）季度水文监测项目的一部分。