March 2004 bin-averaged CTD profiles for the Georgia Coastal Ecosystems Altamaha River transect

Four hydrographic surveys were performed on March 13, 2004, along an east-to-west transect up the Altamaha River in Georgia (Altamaha River Transect, GCE-AL). Vertical CTD profiles were collected at 2-4km intervals from the -4km to 24km 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.

2004年3月13日，研究团队沿佐治亚州（Georgia）阿尔塔马哈河（Altamaha River）自东向西的上游断面（阿尔塔马哈河断面，GCE-AL）完成了4次水文调查。在低潮与高潮潮汐工况下，沿该断面从上游-4km至24km的范围内，以2~4km的间隔采集垂直温盐深仪（CTD）剖面数据。实测获取电导率、温度、压力与光学后向散射数据，并为每条剖面计算得到水深、盐度与sigma-t值。剔除上行测量所得的数据后，对剩余数据按0.5m深度分层进行平均，并通过插值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）季度水文监测项目的一部分。