As part of the EUREC4A-OA project, which is the French oceanographic component of the larger EUREC4A field experiments, the fugacity of CO2 (fCO2) was measured underway during the EUREC4A campaign in the region 50°W-62°W – 5°N-16°N.   Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.

The COAST-HF-MAREL-Iroise buoy is a scientific plateform to monitor at high frequency (subhourly) and for long term (since 2000) the coastal ecosystem of the Bay of Brest, which is impacted by both continental and Iroise Sea inputs.This buoy is a part of the national observation network COAST-HF - COAstal ocean observing system-HighFrequency (http://somlit.epoc.u-bordeaux1.fr/fr/). Both data base are complementary so that manual data are used to qualify and/or correct buoy’s data (e. g. for temperature, salinity and dissolved oxyge). Corrected data are subsequently called « adjusted-parameter » in the Iroise data base. Manual SOMLIT-Portzic data are also systematically used to convert fluorescence sensor data collected in raw fluorescence unit(FFU) into « eq-µg/L of  chlorophyll » : all fluorescence data are then available as « adjusted-fluorecence » in the data base. Precision estimated of the complete data collection process is : temperature (±0.1°C), conductivity (±0.3mS/cm), dissolved oxygen (±10%), in vivo fluorescence (±10%), and turbidity (±10%). By the mean of two additional sensors, these core parameters are completed by aerial Photosynthetic Activated Radiation (PAR) and FugacityCO2 (±3µatm). The data can be viewed on the website: https://www.coriolis-cotier.org/. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.

Collection of Saildrone Atlantic Ocean to Mediterranean (ATL2MED) SD-1030

Hourly measurements made by autonomous Carioca sensors at 2 sites in the northwestern Mediterranean Sea: Dyfamed (1995-1997), Boussole (2013-2015)

The objective of COCOA is to identify mayor partways of nutrients and organic material in various coastal ecosystems around the Baltic Sea. Nutrients and organic matter are transformed and retained along the land-sea continuum, and COCOA will quantify how physical and chemical conditions as well as the boilogical components. BONUS Project.

Hypoxia in the Baltic Sea has become more frequent and widespread over the last century due to increased nutrient inputs from land and atmosphere. Sediments and the benthic faunal community play an important role for recycling nutrients, and the development of hypoxia may occur as cascading regime shifts leading to further deterioration of ecosystem health. Our present knowledge on processes leading to hypoxia is fragmented and discipline-specific, with strong repercussions for accurately computing nutrient reductions needed to restore the Baltic Sea. HYPER will synthesise this knowledge at an ecosystem scale and establish a holistic scientific understanding of the mechanisms leading to hypoxia and associated effects on benthic fauna. To achieve this HYPER will quantify nutrient feedback rates from the sediments over gradients of salinity, temperature and benthic community structure. HYPER will describe the temporal and spatial variability of these processes within the entire Baltic Sea and use this information for improving existing models describing the hydrodynamics and biogeochemistry. Required nutrient reductions to maintain a healthy ecosystem will be estimated taking future climate changes into account. The project will combine field and experimental work into a modelling framework for nutrient management via the Baltic Nest Institute. The project is carried out at 11 institutes covering 6 countries around the Baltic Sea.