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

Nine hydrographic surveys were performed from March 26 to March 31, 2003, 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 -4km to 24km upriver along the transect during various 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3月26日至3月31日，研究团队沿佐治亚州阿尔塔马哈河自东向西的上游断面（阿尔塔马哈河断面，GCE-AL）开展了9次水文调查。在不同潮汐工况下，沿该断面从上游-4km至24km的范围内，以1-2km的间隔采集垂直CTD（温盐深仪，Conductivity Temperature Depth）剖面数据。本次调查测量了电导率、温度、压力、光后向散射强度、光合有效辐射、溶解氧及叶绿素a荧光强度，并针对每条剖面计算了水深、盐度与密度距平（sigma-t）。采集过程中上行剖面获取的数据均已剔除。本数据集为佐治亚海岸生态系统长期生态研究计划（LTER，Long Term Ecological Research）季度水文监测项目的一部分。