Environmental Observatory of the Littoral (EOL) biogeochemical data from the Northwestern Mediterranean sea.

the eol (environmental observation of the littoral) buoy is operated since 2013 in the bay of villefranche-sur-mer (france, 43°40'54.0"n 7°19'10.8"e). this buoy (3.6 m wide, 4 tonnes), equipped with solar panels, allows performing, in an autonomous way, measurements of physico-chemical parameters on a mooring mode (2.5 m depth). this buoy was developed as part of a partnership between the observatoire océanologique de villefranche (oov; now institut de la mer de villefranche, imev) and the company mobilis. data transmission is performed on a daily basis and data stored on a server on land (http://www.obs-vlfr.fr/data/view/eol/surface/). the buoy is currently involved in the coast-hf network as part of the coastal ocean and nearshore observation french research infrastructure (ilico). in particular, the buoy is equipped with a sea-bird sbe smp-odo deployed at the surface (2.5 m). an extra ctd is available in order to rotate during calibration at the manufacturer. underwater cleaning of the sensors is performed on a monthly basis. in addition, a proper cleaning in the lab is performed three times a year. the site where the buoy is deployed is visited (100 m away from the buoy) on a weekly basis as part of the somlit network. in the framework of somlit, casts are performed with a ctd properly cleaned after each use and calibrated on a yearly basis. salinity data from the buoy are corrected based on these extra-measurements. furthermore, discrete sampling is performed for the measurements of oxygen (winkler method) in order to inter-calibrate the respective sensors on the buoy.

自2013年起，位于法国维勒弗朗什港（纬度43°40'54.0"n，经度7°19'10.8"e）的EOL（海岸环境观测）浮标便投入运行。该浮标（宽3.6米，重4吨），配备太阳能板，能够在锚泊模式下（深度2.5米）自主进行物理化学参数的测量。该浮标是在维勒弗朗什海洋观测站（OOV，现更名为维勒弗朗什海洋研究所，IMEV）与Mobilis公司合作开发的项目。数据传输每日进行，并存储于陆地服务器上（http://www.obs-vlfr.fr/data/view/eol/surface/）。目前，该浮标作为法国海岸海洋及近岸观测研究基础设施（ILICO）的一部分，参与海岸HF网络。特别是，浮标上配备了部署于水面（深度2.5米）的Sea-Bird SBE SMP-ODO。另外，还配备了额外的CTD，以便在制造商校准期间进行轮换。传感器每月进行水下清洁，每年在实验室进行三次彻底清洁。浮标部署的地点（距离浮标100米）作为Somlit网络的一部分，每周进行一次访问。在Somlit框架下，每次使用后均对CTD进行适当清洁，并每年进行一次校准。浮标上的盐度数据基于这些额外测量进行校正。此外，还进行离散采样，以测量氧气（温克勒法），以便对浮标上的相应传感器进行校准。