This dataset contains a variety of hydrographic measurements including temperature, salinity, sound velocity, current speed/ direction and seismic data. Hydrographic profilers provided measurements of temperature, salinity, sound velocity and density. Four mooring stations were also installed as part of this project, with three minilogger chains providing temperature data and four moored ADCPs measuring current veloicty. The project ran from February 2006 to September 2009, however all of the data were collected between 17 April 2007 and 14 May 2007 during two cruises which took place in the Gulf of Cadiz. The research was conducted using two research vessels, the RRS Discovery (cruise D318) and the RV Poseidon (cruise PO350). The RRS Discovery cruise D318 was split into two legs, D318a, which took place between 17 April 2007 and 23 April 2007 and D318b, which took place between 29 April 2007 and 14 May 2007. For the second leg of cruise D318, the RRS Discovery was joined by the RV Poseidon. Hydrographic measurements were taken using a variety of instruments, including expendable bathythermographs (XBT), expendable CTDs (XCTD), conductivity-temperature depth (CTD) profilers, acoustic doppler current profilers (ADCP) and VEMCO minilogger chains. Airguns and streamers were used in the recording of the seismic data. The main objectives of the Geophysical Oceanography (GO) project were A) To evaluate and improve new research methods in the developing field of seismic oceanography by exploiting the opportunity of two-ship operations between RSS Discovery and RV Poseidon and B) To study the internal wave field and mixing processes in the Gulf of Cadiz and demonstrate quantitative links between seismic and oceanographic measurements. The cruise was coordinated by Durham Univerity and funded under an EU grant as part of the Framework 6 NEST programme. Eight scientific institutions were involved in the project. These were: the University of Durham, the Proudman Oceanographic Laboratory (POL), the Helmholtz Centre for Ocean Research Kiel (IFM-GEOMAR), the French Research Institute for Exploitation of the Sea (IFREMER), the Italian National Agency for New Technologies, the Energy and Sustainable Economic Development (ENEA), the Spanish National Research Council (CSIC), the University of Western Brittany and the University of Lisbon. Data from the programme are held at the British Oceanographic Data Centre.

The data set comprises a series of ten reports containing tables of current data and diagrams of trajectories derived from neutrally buoyant floats deployed in seas across the globe. The floats were numbered between 1-180 and 209-227, with floats 1-180 being deployed between 1955 and 1964 and floats 209-227 being deployed between February and March 1969. Detailed deployment information is listed below, with deployment location, float numbers, deployment dates and ship name (if known). NE Atlantic: floats 1-5 (Jun 1955, Oct-Nov 1955); float 11 (Aug 1956); floats 12-20 (Mar 1957); floats 25-33 (May-Jul 1958); floats 34-39 (Nov 1958). Norwegian Sea: floats 6-10 (Apr-May 1956). NW Pacific: floats 21-24 (Jul-Aug 1957). Deep water off Bermuda: floats 40-53, 55, 58 (Jun-Oct 1959, RV Aries); floats 54, 56, 57 (Oct 1959, RV Crawford); floats 59-60,64-65,68, 69,71,73-74 (Jun-Dec 1959, RV Aries); floats 61-63,66, 67,70,72 (Nov 1959, RV Crawford); floats 75-77 (Dec 1959, RV Atlantis); floats 78-98 (Feb-Jun 1960, RV Aries); floats 99-119 (Jun-Aug 1960, RV Aries). Faroe-Shetland Channel: floats 120-127 (Jul 1961, RRS Discovery). Faroe Bank Channel: float 135 (1963, Ernest Holt). Labrador Sea: floats 128-132 (1962, Erika Dan). Arabian Sea: floats 133, 134, 136-139 (Jul-Aug 1963, RRS Discovery). Indian Ocean: floats 140-160 (Mar-Apr 1964, RRS Discovery); floats 161-180 (Apr-Aug 1964, RRS Discovery). NW Mediterranean: floats 209-227 (Feb-Mar 1969, RRS Discovery). The reports were produced by the National Institute of Oceanography (NIO), which later became the Institute of Oceanographic Sciences Deacon Laboratory.

Nitrogen Fixation was determined from samples collected during CTD profiles at the surface and chlorophyll maximum once per day from the North Atlantic at approximately 24.5 degrees North on cruise D346 between 5th January and 19th February 2010. The samples were incubated at sea-surface temperature for 24 hours, filtered onto ashed-GF/F's and dried in oven at 50 degrees for further 24 hours. The data are being used as part of a wider study in the role iron has in nitrogen fixation. David Honey collected these data as part of his PhD, supervised by Martha Gledhill and Eric Achterberg.

The dataset comprises 122 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, made in the NE Atlantic specifically NE of Penmarc' h Canyon, during July 1998. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the Defence Evaluation and Research Agency Winfrith.

This is a gridded version of Argo profiling float data from the North Atlantic Ocean and moored MicroCAT CTD data from the RAPID 26N moorings. Data have been reduced to a 1 degree longitude by 1 degree latitude grid using objective mapping. Vertical resolution is 20 decibars; time resolution is 10 days; The data span the years 2004 to 2022. Mapped parameters are in-situ temperature (ITS90) and practical salinity (PSS-78) along with mapping uncertainties in both temperature and salinity. Real-time and delayed mode data with Argo quality flag 1 or 2, and quality controlled RAPID mooring data, were mapped on sigma-1 density surfaces with decorrelation length scale 500 km. Data quality procedures were carried out by the programs that provided the source data. No further data quality control was undertaken prior to mapping. The dataset was created on behalf of the NERC projects ACSIS and CLASS by Brian King of the National Oceanography Centre (NOC). Source datasets for this mapping were: 1) Argo (2023). Argo float data and metadata from Global Data Assembly Centre (Argo GDAC) - Snapshot of Argo GDAC of 10 January 2023. SEANOE. http://doi.org/10.17882/42182#98916. 2) Atlantic meridional overturning circulation observed by the RAPID-MOCHA-WBTS (RAPID-Meridional Overturning Circulation and Heatflux Array-Western Boundary Time Series) array at 26N from 2004 to 2020 (v2020.2), British Oceanographic Data Centre - Natural Environment Research Council, UK. doi:10.5285/e91b10af-6f0a-7fa7-e053-6c86abc05a09. The data are held as a CF-compliant netCDF file.

The Marine Autonomous Systems in Support of Marine Observations (MASSMO) campaign 4 dataset includes data collected by 8 submarine gliders, 2 wavegliders and one autonomous surface vehicle. The dataset comprises recovery version data. i.e. the data downloaded from a vehicle at the end of its mission. The data obtained from gliders operated by the University of East Anglia (UEA) is fully quality controlled. No quality control procedures have been applied to the data obtained from all other autonomous vehicles. Parameters observed include, temperature, salinity, chlorophyll fluorescence, optical backscatter, oxygen, acoustic noise and video data. The dataset was collected within the UK sector of the Faroe-Shetland Channel, focussing on the outer shelf and upper shelf. The work area had a bounding box of 58-62 degrees north and 2-9 degrees west. The MASSMO 4 campaign was run between 1st June 2017 until 7th June 2017 while platforms were deployed they were collecting data continuously. The dataset was collected using a mixture of three autonomous surface vehicles and eight submarine gliders. Glider sensor suites included CTD, bio-optics, oxygen optodes, and passive acoustic sensors. Additionally the surface vehicles were equipped with meteorological sensors and cameras. The campaign comprised a range of oceanographic data collection, but had a particular focus on passive acoustic monitoring of marine mammals and oceanographic features, and included development of near-real-time data delivery to operational data users. MASSMO 4 was co-ordinated by the National Oceanography Centre (NOC) in partnership with University of East Anglia (UEA), Plymouth Marine Laboratory (PML) and Scottish Association for Marine Science (SAMS). The mission was sponsored by Defence Science and Technology Laboratory (Dstl) and involved close co-operation with the NATO Centre for Maritime Research and Experimentation (CMRE) and UK Royal Navy, and was supported by several additional commercial, government and research partners.

This collection of datasets comprises of hydrological data generated during Slocum Gliders campaigns, funded by the UK Met Office Gliders (MOGli) project in the North Sea, near the JONSIS line East of Orkney. The British Oceanographic Data Centre (BODC) manages MOGli glider data since 2022 in order to provide approximately continuous data coverage for meteorological models. Gliders collect pressure, temperature, conductivity and salinity through a CTD sensor. Each platform’s logger records water velocities, depth and engineering variables. Data were collected in near-real-time, where BODC curate the data and deliver the OG1.0 Community (NetCDF and .json) and raw binary format via ERDDAP. Near-real time, recovery (i.e. the data from the SD card when the glider is recovered) and quality controlled delayed mode versions of the data are available. The organisations contributing to the dataset are the UK Met Office and the National Oceanography Centre (NOC). The data are archived at the BODC.

An Alternative Framework to Assess Marine Ecosystem Functioning in Shelf Seas (AlterEco) will utilise a small fleet of submarine and surface autonomous vehicles combined with ongoing observational programmes to capture a seasonal cycle of physical, chemical and biological measurements on repeat transects over ~150km in the North Sea between November 2017 and January 2019. This dataset contains near real-time hydrographic measurements through the water column obtained from submarine Slocum gliders and Seagliders. The submarine vehicles have also been equipped with auxiliary sensors such as turbulence probes, nutrient sensors and acoustic sensors. Data from these platforms will be converted into the international 'Everyone's Gliding Observatories (EGO)' exchange format. This dataset will also contain measurements taken from CTDs deployed on eight cruises to provide calibration data for the autonomous vehicles. AlterEco involves collaboration between scientists at a number of organisations (National Oceanography Centre (NOC, lead), University of East Anglia (UEA), University of Liverpool (UoL), Plymouth Marine Laboratory (PML), Scottish Association for Marine Science (SAMS) and the Centre for Environment, Fisheries and Aquaculture Science (Cefas). In addition, there are a number of UK and international project partners.

The MASSMO 5 dataset includes the near real time transmitted EGO (Everyone’s Gliding Observatories) NetCDF versions of glider data collected by five submarine gliders across three deployment campaigns. Recovery versions of data downloaded from the all gliders with no quality assurance are also available on request. Glider sensor suites included CTD, bio-optics, and oxygen optodes. Parameters observed include, temperature, salinity, chlorophyll fluorescence, optical backscatter, and oxygen data. The MASSMO 5a mission focused on the period 23 Jun 2018 to 06 Jul 2018 and included three submarine glider deployments (UK glider deployments only are included in this dataset). All assets were deployed from NRV Alliance in partnership with NATO-CMRE, but were recovered prematurely due to vessel technical issues. The primary geographic focus of MASSMO 5 was the outer shelf and upper slope off northern Norway, in the region between Bear Island and southern Spitsbergen, but outside the 12 mile territorial limits of these islands. The MASSMO 5b mission occurred within the period 17-24 Oct 2018, a total of three ocean gliders were deployed. The primary geographic focus of MASSMO5b was the northern North Sea to the east of the Orkney archipelago. The MASSMO 5c mission was aborted and no data were collected. The MASSMO 5d mission occurred within period 26 Apr 2019 to 6 May 2019, there was deployment of a single ocean glider. The primary geographic focus of MASSMO 5d was the Faroe Shetland Channel. MASSMO 5 was co-ordinated by the National Oceanography Centre (NOC) in partnership with University of East Anglia (UEA), Plymouth Marine Laboratory (PML) and Scottish Association for Marine Science (SAMS). The mission was sponsored by Defence Science and Technology Laboratory (DSTL) and involved close co-operation with the NATO Centre for Maritime Research and Experimentation (CMRE) and UK Royal Navy, and was supported by several additional commercial, government and research partners.

The dataset comprises the combination of estimates of anthropogenic carbon derived from hydrographic occupations of the 26N section with volume transports for the area between east USA and Africa calculated using the RAPID-MOCHA-WBTS AMOC timeseries. The data cover the time period between April 2004 and October 2012. The observations will be used with data from other sources to determine and interpret the accumulation of anthropogenic carbon in the North Atlantic, to infer the magnitude and variability of uptake of anthropogenic carbon dioxide from the atmosphere, and assess the risk of changes in the meridional overturning circulation on the marine carbon cycle. The Atlantic Biogeochemical Fluxes programme (ABC-Fluxes) is a joint effort between NERC in the UK (Principal Investigator Elaine McDonagh), and NOAA in the USA (Molly Baringer). It builds on the work of the RAPID-MOCHA-WBTS programme, a joint effort between NERC in the UK (Principal Investigator Eleanor Frajka-Williams), NOAA (Molly Baringer) and RSMAS (Bill Johns) in the USA. The Atlantic anthropogenic carbon transport (and its components), calculated from the above data, are held by BODC in NetCDF format.