Students and researchers at the University of the Caribbean together with members of the Cooperative Sea of ??the Antilles, conducted an oceanographic campaign at the site called cayo Alcatraz, where there are two underwater springs also known as “ojos de agua”. These springs are located within the polygon of the protected area of ??the Mexican Caribbean Biosphere Reserve, to the west of Isla Contoy National Park. The purpose of the campaign was to begin studies of the environmental conditions and reconnaissance of the site. The measuring instruments used were; SonTek CastAway-CTD, and a Gopro Black 7 camera.  were made a set of 12 temperature, salinity, and conductivity profiles. Water samples were also taken for subsequent microbiological analysis. 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 CARBO-ACID research cruise (EUROFLEETS+ SEA02_10) was carried out on the RV Ramón Margalef between August 2nd and August 11st, with departing from Vigo – Spain and ending in Lisbon – Portugal. The main objective of this cruise was to collect data and samples to study the potential effects of ocean acidification on carbonate marine organisms (coccolithophores, pteropods, planktonic and benthic foraminifera, and corals) along the Iberian margin. With this objective, oceanographic data and water samples, plankton, cold-water corals and sediment samples were collected during an upwelling season, along two transects coinciding with the two persistent upwelling filaments off the Iberia Margin: the Cape Finisterra and the Cape Roca. In this dataset is guiven all the acquired data recollected onboad.  During the CARBO-ACID cruise we did a total of 7 stations, 4 stations along the Cape Finisterra transect (from W to E: CA3, CA2, CA7, CA8) and 3 stations at the Cape Roca (from W to E: CA6, CA5, CA4) transect (Fig). At each station we usually started with a multibeam survey, a CTD and Rosette cast. These initial operations allowed to identify the different water masses present in this area, characterize their physical properties and to recover seawater samples at specific depth levels. The seawater samples were onboard subsampled, preserved in cold conditions or with chemicals and/ or filtered for several further analysis in the shore-based laboratories: DNA, chlorophyll, fitoplankton, coccolithophores, pH, alkalinity, stable isotopic composition, trace elements concentration and Suspend Particulate Matter. Subsequently to these operations, at each station, two vertical tows with a plankton multinet (with 5 nets) were done on the top 700 m of the water column to sample the planktonic communities of the different water depths. After this, sediment samples were recovered with a box-corer to study the past oceanographic conditions, between the pre-industrial Era and the Present, with multi-proxies used in paleoceanography and sedimentology. A total of 10 box-cores were recollected and each of them was onboard sub-sampled for eDNA, enzymes and benthic foraminifera. Fifteen shipek grab samples were recollected at the Fontanelas seamount (Estremadura Spur), station CA6, to characterize the sedimentary cover and to evaluate the presence of deep cold-water corals. Preliminary results show that the stations CA7, CA8 and CA4, located close to the coast, as expected, are the most influenced by the coastal upwelling, exhibiting colder surface water, higher values of fluorescence, and more zooplankton content reflecting higher phyto-zooplankton concentrations, as typical of the upwelling waters. At station CA4 temperature was higher and fluorescence showed lower values, indicative of less phytoplankton, and interpreted as indicating a different upwelling source water from that upwelled further north. Based on the CTD data, the Cape Roca transect is more influenced by the subtropical East North Atlantic Central Water (ENACWst), while the Cape Finisterra transect is more under the influence of the subpolar branch (ENACWsp). Seafloor sediment samples showed significant differences between the stations. Along the northern transect (Cape Finisterra) the seafloor sediments show an increase in grain size from the offshore to the coast. The offshore stations CA3 and CA2 revealed finer grained sediments, CA8 were composed of coarser sand and the station CA7, the shallowest station 77 m, presented the sediment composed mainly of shell fragments and coarse grain sand. Along the southern transect (Cape Roca), the offshore station CA6 (Fontanelas seamount) has coarser sandy sediments with rock clasts and cold-water coral fragments, and the stations CA5 and CA4 with fine sand to muddy sediments. The detailed CA6 bathymetry allowed to verify the existence of small plateaus on the slope of the Fontanelas seamount, where the fossil cold-water corals fragments were found, suggesting that this area is a very interesting system deserving further study with a ROV, and to characterize the corals fields and verify if there are live corals. These recollected data and samples will allow not only to reconstruct the pH variability under different environmental conditions, but also to estimate the biogeochemical changes along the coastal ocean waters as the anthropogenic influence increases. These results will contribute to better understand and model the effects on the biota under the future expected oceans pH changes. 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.

This dataset is a compilation of en-route thermo-salinometry data recorded by the RV A962 Belgica. Data are grouped per campaign from 1993 until 2021. Data are measured by a Sea-Bird thermo-salinometry sensor installed in the vessel Scientific Seawater circuit (constant depth).

Current meter Nortek Aquadopp data. Data for 2 current meter deployments of NORTEK Aquadopp instruments at the Rainbow Massif. Instruments where kindly provided by the Parc National d'Instrumentation Océanographique de l'INSU. Data is provided in 2 sets of files, corresponding to deployments AES_C01 and AES_C02. The instruments where installed in a broadband OBS (BBOBS) from the INSU OBS National Park.  Deployment AES_C02 includes two lowerings (see information below, indicated as deployments AES_C02A and AES_C02B). AES_C01 with current meter serial number : A6L6094 (head) AQD11097 (Hardware), deployed on BB03 with deployment AES_B01_BB3. Bottom position: 36.23544°N, 33.91036°W, 2505 m waterdepth. AES_C02_A with current meter serial number : A6L6127 (head) AQD11247 (Hardware), deployed on BB02, deployment AES_B03_BB02. Bottom position: 36.22233°N, 33.87996°W, 1950m waterdepth. AES_C02_B with current meter serial number : A6L6127 (head) AQD11247 (Hardware), deployed on BB02, deployment AES_B06_BB02. Bottom position: 36.2020833°N, 33.8118833°W, 2557m waterdepth. Data are provided in two zipped files that include: AESC0101.aqd: Aquadopp binary file AESC0101.dat: Ascii table of data - full record AESC0101.dia: Aescii data file - partial record AESC0101.hdr: Instrument parameter information and description of columns in AESC0101.dat AESC0101.mat: Matlab file corresponding to AESC0101.dat AESC0101.ssl: Log of instrument (error and info messages) In addition to several instrument logs: AESC01_start.log AES_C01_deploy.dep AESC01_start.dep The ascii file contains 27 columns as follows:   1   Month                         (1-12)   2   Day                              (1-31)   3   Year   4   Hour                             (0-23)   5   Minute                          (0-59)   6   Second                          (0-59)  7   Error code   8   Status code   9   Velocity (Beam1|X|East)          (m/s) 10   Velocity (Beam2|Y|North)     (m/s) 11   Velocity (Beam3|Z|Up)           (m/s) 12   Amplitude (Beam1)                (counts) 13   Amplitude (Beam2)                (counts) 14   Amplitude (Beam3)                (counts) 15   Battery voltage               (V) 16   Soundspeed                   (m/s) 17   Soundspeed used         (m/s) 18   Heading                          (degrees) 19   Pitch                             (degrees) 20   Roll                             (degrees) 21   Pressure                         (dbar) 22   Pressure                         (m) 23   Temperature                  (degrees C) 24   Analog input 1 25   Analog input 2 26   Speed                             (m/s) 27   Direction                        (degrees) 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 Reykjanes Ridge is a major topographic feature of the North-Atlantic Ocean. It lies in a central position along the main paths followed by the upper and lower limbs of the Meridional Overturning Cell (MOC), which contributes at moderating the European climate in creating a transport of heat toward the North Atlantic. Our hypothesis is that the Reykjanes Ridge influences the main components of the upper and lower limbs of the MOC because it is a strong constraint on the horizontal and vertical circulation, it impacts the water mass distribution and evolution and it is a region of intense turbulent mixing. The objective of the RREX project is to conduct a process study in order to better understand the role of the Reykjanes Ridge on the dynamics and water mass transformation in the subpolar gyre and ultimately on the MOC. This project relied on two hydrographic cruises carried out in 2015 and 2017 to acquire the adequate dataset to (1) provide a synoptic high-resolution and full depth survey to monitor the flow along and across the ridge, (2) to quantify the variability of the vertical and horizontal structure of the currents parallel to the ridge at daily to seasonal time-scales and (3) to provide sufficient turbulence observations to monitor the heterogeneous and intermittent mixing processes. This dataset currently provides the measurements from the 133 CTDO2 stations realized during the RREX2015 cruise, carried out from the 5th of June to the 10th of July 2015. At each station, the following measurements are available: (1) pressure, temperature, conductivity and dissolved oxygen measurements with a CTDO2 probe, (2) salinity and oxygen concentration data from sea water samples at 28 levels. It also provides OS38 and OS150 S-ADCP data acquried in transit during the RREX2015 cruise. The two datasets were processed and adjusted following Petit et al. 2018 [http://doi.org/10.13155/53471].   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.

This Sound Velocity profile was recorded during the multibeam bathymetry mapping in the North Atlantic. This calibration allowed the correct acquisition of multibeam echo sounder data

This Sound Velocity profile was recorded during the multibeam bathymetry mapping in the North Atlantic. This calibration allowed the correct acquisition of multibeam echo sounder data

This Sound Velocity profile was recorded during the multibeam bathymetry mapping in the North Atlantic. This calibration allowed the correct acquisition of multibeam echo sounder data

This dataset was produced during the Eurofleets + PORO-CLIM cruise. Project PORO-CLIM was conceived to study interplay between the first-order geological processes of continental rifting and break-up, Large Igneous Province emplacement, and global climate change, and to provide ship-based training for a cohort of international students. Cruise CE21008, the PORO-CLIM data acquisition cruise, carried out a marine geophysical survey of the POrcupine and ROckall continental passive margins, to investigate the cause of the Paleocene/Eocene Thermal Maximum, a natural CLIMate change event that is the closest deep-time analogue of anthropogenic environmental change (though the modern change is happening much faster). Project PORO-CLIM also includes a three year post-cruise data work-up phase. 65 expendable bathytherograph (XBT) probes (T-5, T-11) were deployed to constrain the seismic velocity in the water layer. Sound speed was calculated assuming a constant salinity of 34.9 psu. The €1.2M project is funded by the EU Horizon 2020 EuroFleets+ programme, the PIPCORSG industrial consortium and the Irish Marine Research Programme.

This dataset was produced during the iMAR cruise “The Integrated assessment of the distribution of Vulnerable Marine Ecosystem along the Mid-Atlantic Ridge (MAR) in the Azores region”, that took place aboard the Research Vessel Pelagia of the Royal Netherlands Institute for Sea Research between May 19th and June 2nd 2021. The iMAR cruise aimed to evaluate the role of the MAR in shaping latitudinal and trans-Atlantic patterns in deep-sea biogeography, connectivity and assemblages of deep-sea megafauna. This expedition was funded by the SEA OCEANS program of Eurofleets+ and the H2020 European project iAtlantic, and was led by the University of the Azores (Portugal) in collaboration with the Hydrographic Institute and University of Porto (Portugal), the University of Aarhus (Denmark), the National Oceanography Center (United Kingdom), GEOMAR (Germany), the University Museum of Bergen (Norway), the PP Shirshov Institute of Oceanology (Russia), and the University of Vale do Itajaí (Brazil).   Vertical CTD Seabird SBE 32 /Rosette profiles were conducted at 19 stations to generate Sound Velocity Profiles (Table 1), mainly in the North portion of the MAR in the Exclusive Economic Zone around the Azores. The “.cnv” files contain the sound velocity data binned to 1 m depth intervals using the “bin average”. 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.