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

Four hydrographic surveys were performed on March 23, 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 2km east of the line of demarcation (station -02) to 28km upriver along the transect during flood and ebb 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3月23日，针对佐治亚州阿尔塔马哈河（Altamaha River）沿东西向布设的顺流断面开展了四次水文调查（阿尔塔马哈河断面，GCE-AL）。在涨潮与落潮时段，沿该断面从分界点以东2km处（站位-02）向上游延伸28km的范围内，以1~2km的间隔采集垂直温盐深（Conductivity, Temperature, Depth, CTD）剖面数据。本次调查测量了电导率、温度、压力与光学后向散射数据，并针对每条剖面计算得到水深、盐度与密度距平（sigma-t）值。研究人员弃去仪器上浮阶段采集的全部数据，将剩余数据按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（Long-Term Ecological Research, LTER）季度水文监测计划的组成部分。