MCR LTER: Coral Reef: Benthic Photosynthetically Active Radiation (PAR), ongoing since 2009

These data contain a time-series from sequential deployments of an ALW-CMP PAR sensor recording quanta of photosynthetically active radiation underwater between wavelengths 400 nm to 700 nm every two seconds. The sensor window is wiped free of algae periodically to prevent fouling. Deployments are three to six months in length. The sensor was mounted at 17 m depth on the fore reef, and at 2 m depth on the Backreef. PAR irradiance is measured as quanta in micromoles of photons per square meter per second.本数据集包含一套时序序列，来自依次部署的ALW-CMP光合有效辐射（Photosynthetically Active Radiation, PAR）传感器。该传感器每2秒采集一次水下400 nm至700 nm波长范围内的光合有效辐射量子数。为防止生物污损，传感器窗口会定期清除附着藻类。单次部署时长为3至6个月。该传感器分别安装在前礁（fore reef）17米水深处，以及后礁（Backreef）2米水深处。光合有效辐射辐照度以量子数形式计量，单位为微摩尔光子每平方米每秒。