December 2002 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect

Four hydrographic surveys were performed on December 11, 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 -2km to 28km upriver along the transect during low and high tidal regimes. Conductivity, temperature, pressure and optical backscatter were measured, and depth, salinity and sigma-t were calculated for each profile. Data values collected on the upcast were deleted, and the remaining data were averaged within 0.5m depth bins and interpolated to produce a smooth profile for contouring. This data set was collected as part of the Georgia Coastal Ecosystems LTER quarterly hydrographic monitoring program.

2002年12月11日，针对佐治亚州阿尔塔马哈河自东向西的上游河段断面，共开展了4次水文调查（阿尔塔马哈河断面，GCE-AL）。本次调查在落潮与涨潮两个潮汐状态下，沿该断面从上游-2km至28km的区段内，以1~2千米的间隔采集了垂直温盐深（CTD）剖面数据。每条剖面均测量了电导率、温度、压力与光学后向散射参数，并计算得到水深、盐度及密度距平（sigma-t）值。调查舍弃了上行剖面采集的全部数据，将剩余数据按0.5米深度分层取平均值，并通过插值处理生成平滑剖面以用于等值线绘制。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组成部分。