MCR LTER: Coral Reef: Ocean Currents and Biogeochemistry: salinity, temperature and current at CTD and ADCP mooring FOR04 from 2004 ongoing

Moored and bottom-mounted instrumentation (ADCP, CTD, thermistors, wave-tide meters) sampled year-round on the reef of Moorea Island, French Polynesia at LTER 4 fore reef site (FOR04). Sampling began in 2005. All data have been interpolated onto a 20 min grid. ADCP data are organized into 1-meter bins, measured as height from the bottom, to a maximum of 20 bins. All bins may not be filled, and although post-processing attempted to exclude data from bins 'above the surface', users need to exercise caution with the near-surface bins. CTD parameters include Pressure, Temperature, Conductivity, Salinity, and Density. The two moored CTD packages are located approximately 5 and 14 meters above the bottom, and there are up to 5 additional temperature thermistors spaced vertically along the mooring line. Note that the upper CTD and temperature thermistor data were terminated in January 2020. Bottom CTD was terminated July 2021. There are 2 bottom mounted thermistors in the vicinity of the mooring at 10 and 20 meter depth. A bottom-mounted wave-tide meter provides a measure of significant wave height and dominant wave period at a 2-hour sampling interval. Tide-related data may be calculated from bottom-mounted pressure sensor data.

本数据集采集于法属波利尼西亚莫雷阿岛长期生态研究站（Long Term Ecological Research，LTER）4号礁前站点（FOR04）的礁体海域，采用锚系与底置式观测仪器（声学多普勒流速剖面仪（Acoustic Doppler Current Profiler，ADCP）、温盐深仪（Conductivity-Temperature-Depth，CTD）、热敏电阻温度计（thermistors）、潮波仪（wave-tide meters））开展全年连续采样，采样工作始于2005年。所有数据已被插值至20分钟的时间网格中。声学多普勒流速剖面仪数据以距底高度为基准被划分为1米间距的分层，最大分层数为20层。并非所有分层均存有有效数据，尽管后期处理尝试剔除“海面以上”分层的数据，但用户需谨慎处理近海面分层的观测数据。温盐深仪的观测参数涵盖压力、温度、电导率、盐度与密度。两套锚系温盐深仪分别布设于距底约5米和14米处，另有最多5台热敏电阻温度计沿锚缆垂直分布。需注意：上部温盐深仪与热敏电阻温度计的观测数据于2020年1月终止采集，底置温盐深仪的观测数据则于2021年7月终止采集。锚系附近海域设有2台底置式热敏电阻温度计，布设深度分别为10米与20米。另有一台底置式潮波仪，以2小时间隔采样有效波高与主波周期。潮汐相关数据可通过底置压力传感器的观测数据计算得到。