May 2004 CTD, PAR, oxygen and chlorophyll profiles for the Georgia Coastal Ecosystems Altamaha River transect

Four hydrographic surveys were performed on May 28, 2004, along an east-to-west transect up the Altamaha River in Georgia (Altamaha River Transect, GCE-AL). Vertical CTD profiles were collected at 2km intervals from -4km to 24km 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.

2004年5月28日，针对佐治亚州阿尔塔马哈河（Altamaha River）上游自东向西的断面开展了四次水文测量，该断面命名为阿尔塔马哈河断面（Altamaha River Transect, GCE-AL）。在高低潮时段内，沿该断面在上游-4km至24km的区间内，以2km的间隔采集垂直温盐深（CTD）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、溶解氧以及叶绿素a荧光等参数，并针对每条剖面计算得到深度、盐度与西格玛-t（sigma-t）值。上行测量阶段采集的数据值均已剔除。本数据集为佐治亚海岸生态系统长期生态研究（LTER）季度水文监测计划的采集成果。