In early 2017, Shom established a near-bottom turbidity observation network to measure turbidity and currents near the seabed continuously, at high frequency and over a long period of time (several years). Seven mooring points with ecological and / or sedimentological interests and impacted by anthropogenic activities (except the control point in the Celtic Sea) have thus been defined. The product "Turbidity Time Series ROEC" contains turbidity level records measured in NTU by optical turbidimeters implanted at each of the 7 wetting points of the monitoring network. The data present in the product "ROEC Turbidity Time Series" corresponds to raw data from NTUS sensors (Wetlabs) deployed on different moorings and transcoded in .CSV format. The time series are provided in their entirety and have not been post-processed. The files can therefore include certain erroneous values ​​related to specific anomalies in the acquisition made by the sensor or intervals without data when the acquisition knows ranges of interruption.

Shom is the national referent for the level of the sea in situ on all areas under French jurisdiction. In this capacity, he assures under the acronym REFMAR different coordination functions in the collection and dissemination of public data related to water level observations, in order to promote their use in multiple applications within the framework of international recommendations.

Shom manages a network of permanent digital coastal tide-gauges on French coasts: the RONIM Sea Level Observation Network. Most tide-gauge observatories are partnered with one or more local partners.<br /><br /> Four main types of data are available for download:<br /> - “Raw high frequency" data: raw observations neither validated nor evaluated, obtained directly from the sensor. 1-minute measurement; integration time 15 seconds (on the minute); sampling period: 1 second.<br /><br /> - "Raw non-real time" data: raw observations neither validated nor evaluated, obtained directly from the sensor. 10-minute measurement; integration time 121 seconds (around every 10 minutes); sampling period: 1 second.<br /><br /> - "Validated non-real time" data: observations checked and validated by Shom from the "Raw non-real time" data. 10-minute measurement; integration time 121 seconds (around every 10 minutes); sampling period: 1 second.<br /><br /> - "Validated hourly" data: observations checked and validated by Shom, generated from "Validated non-real time" data. Hourly measurement obtained from the Vondrak filter with triangular weighting. The hourly height cannot be calculated in the event of an observation gap greater than 1.5 hours.