June 2002 bin-averaged CTD 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 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6月20日，针对美国佐治亚州（Georgia）阿尔塔马哈河（Altamaha River）布设的东西向河道断面（阿尔塔马哈河断面，GCE-AL）开展了4次水文测量作业。在高低潮期内，沿该断面从分界测站（测站+00）向上游延伸28km的范围内，以1~2km的间隔采集垂直温盐深（CTD）剖面数据。本次测量同步获取电导率、温度、压力与光学后向散射系数，并针对每条剖面计算得到水深、盐度及比容密度σ_t。上行测量阶段获取的数据已被剔除，剩余数据在0.5米深度分层内进行平均，经插值处理后生成平滑剖面以供等值线绘制。本数据集为佐治亚海岸生态系统长期生态研究（Long-Term Ecological Research，LTER）季度水文监测项目的组成部分。