December 2003 CTD, PAR, oxygen and chlorophyll profiles for the Georgia Coastal Ecosystems Altamaha River transect

Four hydrographic surveys were performed on December 2, 2003, 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 the -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.

2003年12月2日，针对佐治亚州（Georgia）阿尔塔马哈河（Altamaha River）自东向西的上游河段断面开展了4次水文调查（该断面命名为阿尔塔马哈河断面，编号GCE-AL）。沿该断面在-4km至24km的上游河段，以2km为间隔，在低潮和高潮潮汐工况下采集了垂直CTD（Conductivity Temperature Depth，温盐深剖面仪）剖面数据。本次调查测量了电导率、温度、压力、光学后向散射系数、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水深、盐度以及密度距平（sigma-t）。仪器上浮阶段采集的数据已被剔除。本数据集为佐治亚州海岸生态系统长期生态研究（Long-Term Ecological Research，LTER）季度水文监测计划的一部分。