SOMLIT-like Lanvéoc time series (French Research Infrastructure ILICO): long-term core parameter monitoring in Bay of Brest

The SOMLIT-Like -Lanvéoc time series data characterize the hydrology of the Bay of Brest, at 48°17'39"N - 04°27'09"W location. The Bay of Brest is a semi-enclosed, macro-tidal, marine ecosystem of 180 km2, connected to the Iroise Sea by a narrow and deep strait of 2 km width, and 40 m depth max. It is under the influence of the Aulne river, representing 70% of the total river discharge. Fortnightly measurements have been undertaken since January 2019 by the IUEM/UBO/CNRS-LEMAR to detect the long-term evolution of hydrology in the land-sea continuum including natural and anthropogenic forcings. The data from the Lanvéoc station are collected according to protocols established by the French monitoring network SOMLIT (https://www.somlit.fr/), accredited by the CNRS as a national Earth Science Observatory (ILICO, https://www.ir-ilico.fr). The Lanvéoc station is upstream of the SOMLIT-Portzic observatory station (10.17882/91173). At the time of writing, the process of requesting SOMLIT accreditation for Lanvéoc station is underway. SOMLIT-Like-Lanvéoc samples are collected at 1m depth of a 10 m water column, at high neap tide (7m tidal range), near slack water. Samples collected are analysed for more than 20 core parameters: Sea Surface Temperature (SST), Sea Surface Salinity (SSS), dissolved oxygen (O2), pH, ammonia, nitrates, nitrites, phosphates, silicates, suspended matter, particulate organic carbone, particulate organic nitrogen, chlorophyll a, delta15N, delta13C; pico- and nano- plankton; CTD-PAR-profile. The microphytoplankton is simultaneously identified in accordance with the national PHYTOBS-network’s (https://www.phytobs.fr/) protocols. Complementary parameters are also measured for specific research studies: biogenic silica  at 1m depth and the microphytobenthos and high frequency CTDO2Fluo-measurements at sediment-water interface. The SOMLIT-Like-Lanvéoc time series data are collected in compliance with the SOMLIT network quality management system, in line with the kSO/IEC 17025:2017 standard: “General requirements for the competence of testing and calibration laboratories”. Further information on standard operating procedures for sample collection and data acquisition are available at: https://www.somlit.fr/parametres-et-protocoles. For more information on the quality flagging scheme: https://www.somlit.fr/codes-qualite/.

Disciplines

Fisheries and aquaculture

Keywords

Environmental time series, Coastal system evolution, Climate impact, Coastal ecology, Hydrological and biogeochemical data

Location

48.349249N, 48.258585S, -4.334599E, -4.55278W

Devices

A SBE-19Plus profiler is used for CTD, PAR and Fluorescence measurements. To guarantee best performances, the sensors return to the constructor every two years for calibration.

Data

FileSizeFormatProcessingAccess
Lanvéoc HYDRO_PiconanoPlankton_CTD Profiles_Data
51 KoCSVQuality controlled data
High Frequency Hydrology Bottom Water Lanveoc 2019-2023
6 MoCSVQuality controlled data
How to cite
Grossteffan Emilie, Delebecq Gaspard, Rimmelin-Maury Peggy, Amice Erwan, Bihannic Isabelle, Bihannic Kevin, Carlier Robin, Devesa Jérémy, Gallinari Morgane, Gromberg Theo, Lambert Christophe, Lebec Thierry, Legoff Manon, Quéré Frank, Leynaert Aude (2024). SOMLIT-like Lanvéoc time series (French Research Infrastructure ILICO): long-term core parameter monitoring in Bay of Brest. SEANOE. https://doi.org/10.17882/99991

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