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British Oceanographic Data Centre

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  • This dataset consists of daily Florida Current transport measurements, Conductivity-Temperature-Depth (CTD) and Oxygen profiles and moored Inverted Echo Sounder (IES) travel time data. The data form part of the Western Boundary Time Series (WBTS) project. The data have been collected since 1982 in the Florida Straits, Northwest Providence Channel and eastwards of Abaco Island, Bahamas. The Florida Current transport measurements are made using a submarine telephone cable plus calibration cruises and the CTD, oxygen profiles and IES data are collected using dedicated research ship time and moorings. The data are collected in order to monitor variability of the transport carried by the Deep Western Boundary Current. The project is led by scientists at the Physical Oceanography Division of the Atlantic Oceanographic and Meteorological Laboratory. Data are held at the British Oceanographic Data Centre.

  • This data set consists of a bathymetric grid derived from multibeam bathymetry data from cruise JC071. The bathymetric grid was created by gridding the cleaned raw multibeam data from JC071 at 1/64 arc-minute intervals using a nearneighbour gridding algorithm from the Generic Mapping Tools (GMT) software system. The data set covers an approximate one degree square with the minimum and maximum longitude and latitude co-ordinates: 17.016667W-16.216667W; 48.78333N-49.28333N. This is located in the Northeast Atlantic Ocean area. The data were collected from 7th-8th May 2012 using an EM120 Multibeam Echo-sounder. The cruise was part of the Porcupine Abyssal Plain (PAP): sustained ocean observation project. The bathymetry data were collected on an opportunistic basis during the cruise. The cruise was operated by the National Oceanography Centre (NOC), equipment operated by National Marine Facilities Sea Systems. The bathymetric grid was created by BODC for contributing to the EMODnet High Resolution Seafloor Mapping (HRSM) Project.

  • The World Ocean Circulation Experiment (WOCE) sea level data set comprises data collected from approximately 160 tide gauge sites distributed around the world. The data are usually hourly heights of sea surface elevation, although some were collected and supplied at higher frequencies (i.e. 6 or 15 minute intervals) or as pressure values rather than elevations. The data are primarily from 1990 to 1998 (the WOCE period), but the dataset also includes historical data as a number of the tide gauges had been operating for many years. The total volume of data held is 3550 site years. A few sites have data extending back over 50 years and many over 20 years. The British Oceanographic Data Centre (BODC) was responsible, as a WOCE Data Assembly Centre (DAC), for assembling, quality controlling and disseminating this comprehensive sea level data set. Data were supplied by Argentina, Australia, Canada, Chile, China, Cuba, Denmark, Ecuador, France, Iceland, Japan, New Zealand, Peru, Philippines, Portugal, Russia, South Africa, Spain, Ukraine, the UK and the USA. Data quality control was carried out with the aid of sophisticated screening software which allows rapid inspection of the data. The sea level data were tidally analyzed and the residuals inspected. Parameters other than sea level, for example atmospheric pressure and sea surface temperature, were also visually inspected. This quality control identified spikes and gaps in the data in addition to timing problems and datum shifts. Any problems identified were resolved with the data supplier. Qualifying information accompanying the data was also checked and data documentation assembled. The data can be downloaded from the BODC web site, or made available on CD-ROM.

  • The data set comprises more than 7000 time series of ocean currents from moored instruments. The records contain horizontal current speed and direction and often concurrent temperature data. They may also contain vertical velocities, pressure and conductivity data. The majority of data originate from the continental shelf seas around the British Isles (for example, the North Sea, Irish Sea, Celtic Sea) and the North Atlantic. Measurements are also available for the South Atlantic, Indian, Arctic and Southern Oceans and the Mediterranean Sea. Data collection commenced in 1967 and is currently ongoing. Sampling intervals normally vary between 5 and 60 minutes. Current meter deployments are typically 2-8 weeks duration in shelf areas but up to 6-12 months in the open ocean. About 25 per cent of the data come from water depths of greater than 200m. The data are processed and stored by the British Oceanographic Data Centre (BODC) and a computerised inventory is available online. Data are quality controlled prior to loading to the databank. Data cycles are visually inspected by means of a sophisticated screening software package. Data from current meters on the same mooring or adjacent moorings can be overplotted and the data can also be displayed as time series or scatter plots. Series header information accompanying the data is checked and documentation compiled detailing data collection and processing methods.

  • This dataset consists of measurements of underway meteorology, navigation and sea surface hydrography. A comprehensive survey of the Southwest Indian Ocean, more specifically, the Southwest Indian Ridge (SWIR), was undertaken between 07 November 2011 and 21 December 2011 on the RRS James Cook cruise JC066. Navigation data were collected using an Applanix POSMV system and meteorology and sea surface hydrography were collected using the NMF Surfmet system. Both systems were run for the duration of the cruise, excepting times for cleaning, entering and leaving port, and while alongside. Data were collected as part of the NERC-funded project “Benthic Diversity of seamounts in the Southwest Indian Ocean”. The project aimed to describe and analyse the diversity and distribution of benthic assemblages, from meiofauna to megafauna, on seamounts in the central section of the SWIR between 41S, 42E and 33S, 58E. The NERC funded project was funded primarily by grant NE/F00504/1, with child grants NE/F006292/1 and NE/F005563/1. The lead grant is held at the University of Oxford, Department of Zoology, by Professor Alex David Rogers. The child grants are held at the natural History Museum, Life Sciences, by Dr Gordon Patterson, and the Scottish Asssociation for Marine Science, Dunstaffnage Marine Laboratory, by Dr Bhavani Narayanaswamy, respectively. Underway navigation, meteorology and sea surface hydrography data have been received as raw files by BODC and are available upon request.

  • The data set comprises those data collected on UK World Ocean Circulation Experiment (WOCE) cruises. The cruises completed to date have collected data either in the North Atlantic (RRS Charles Darwin 58, 59, 62, 62a, 68 and 78; RRS Discovery 223, 230 and 233) or in the Southern Ocean (RRS Discovery 199, 200, 201, 207, 213 and 214; RRS James Clark Ross 0a, 0b, 10, 16 and 27). Conductivity-temperature-depth (CTD) data are held from all 20 cruises. 14 out of the 16 shipborne acoustic Doppler current profiler (ADCP) data sets are held, those from RRS Discovery 230 and RRS James Clark Ross 0b are still to be received. 4 out of the 6 lowered ADCP data sets are held, those from RRS Discovery 230 and 233 are still to be received. 3 out of the 4 SeaSoar data sets are held, with that from RRS Discovery 223 still to be received. 12 out of 13 eXpendable BathyThermograph (XBT) data sets are held, with that from RRS James Clark Ross 0a still awaited. All main water bottle data sets have been received apart from chlorofluorocarbon (CFC) tracer data from RRS Discovery 223, 230 and 233. All of the main underway data sets thermosalinograph, meteorology, etc.) are held apart from thermosalinograph data from RRS James Clark Ross 0b.

  • This dataset comprises hydrographic data from conductivity and temperature sensors deployed at fixed intervals on moorings within the water column or close to the sea bed on benthic frames. The measurements were collected at five sites within the Faroe – Shetland channel during the FS Poseidon cruise PO328 between 07 and 23 September 2005. The data have been processed, quality controlled and made available by the British Oceanographic Data Centre (BODC). The data were collected as part of the Slope Mixing Experiment, a Proudman Oceanographic Laboratory (POL) core Natural Environment Research Council (NERC) funded project, which aimed to estimate slope mixing and its effects on waters in the overturning circulation. Detailed in situ measurements of mixing in the water column) were to be combined with fine resolution 3-D and process models. The experiment was lead by POL, in collaboration with the School of Ocean Sciences, University of Wales, Bangor; the Scottish Association for Marine Science (SAMS); the University of Highlands and Islands and the Institute of Marine Studies (IMS) at the University of Plymouth. The Slope Mixing Experiment dataset also includes conductivity-temperature-depth (CTD) profiles, moored Acoustic Doppler Current Profilers (ADCP), vessel mounted ADCP sensors as well as 3-D and process models. These data are not available from BODC.

  • The data set comprises of geophysical observations in the source regions of the 2004 and 2005 great Sumatra earthquakes. Geophysical surveys were carried out to determine the seabed bathymetry and underlying structure and geometry and included the collection of seismic reflection, magnetic, gravity, and sidescan sonar data. In addition, Conductivity-Temperature-Depth (CTD) and Sound-Velocity Probe (SVP) data were collected, as well as continuous meteorological (air pressure, air temperature, radiance, relative humidity, wind direction and speed) and sea surface (temperature and conductivity) data. Data were collected in the Indian Ocean, west and north west of Sumatra between 8 degrees South, 6 degrees North, 94 and 108 degrees East. The data were collected during three cruises, SO198-1, SO198-2 and SO200 over two legs SO200-1 and SO200-2. The three cruises took place between May 2008 and February 2009. The data collection focussed on the areas around two earthquake segment boundaries: Segment Boundary 1 (SB1) between the 2004 and 2005 ruptures at Simeulue Island, and Segment Boundary 2 (SB2) between the 2005 and smaller 1935 ruptures between Nias and the Batu Islands. Measurements were taken using a variety of instrumentation across all three cruises including: the long-term deployment of 50 Ocean-Bottom Seismometers (OBS) deployed on cruise SO198-1 and retrieved on cruise SO200-1; 154 Expendable Bathythermograph (XBT) probes; high resolution multichannel seismic reflection (MCS) profilers; Swath bathymetric and backscatter echosounders; SVPs and CTDs which were deployed simultaneously; and a gravity meter and Parasound sub-bottom profiler were operated continuously within the survey areas. In addition, sea surface and meteorological measurements were made using the underway system throughout the three cruises, although there are no data for days at the beginning and end of the cruises of up to 10 days. During the two legs of SO200 additional instrumentation was deployed including: a 30 kHz deep-towed sidescan sonar system (TOBI); piston cores and megacores collected along the plate margin; and heatflow probes long transects. The UK Sumatra Consortium project aimed to characterise the subduction boundary between the Indian-Australian plate and the Burman and Sumatra blocks (including subduction zone structure and rock physical properties), record seismic activity, improve and link earthquake slip distribution to the structure of the subduction zone and to determine the sedimentological record of great earthquakes (both recent and historic) along this part of the plate margin. The project will allow better assessment of future earthquake magnitudes and locations, and further the general understanding of the earthquake rupture process. The UK Sumatra Consortium project was led by the National Oceanography Centre Southampton (NOCS) and involved five UK partners; NOCS, the universities of Cambridge, Oxford and Liverpool, and the British Geological Survey as well as numerous international partners including French, German, American, Indonesian and Indian Collaborators. The principal investigator was Dr Timothy Henstock from NOC. The Natural Environment Research Council (NERC) funded data will be managed by the British Oceanographic Data Centre (BODC).

  • 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 data set comprises time series of wave height and period data from in-situ wave recorders at fixed locations. Principal parameters are significant/characteristic wave height and mean zero crossing period - usually derived from the analysis of 20 or 30 minute recordings taken at intervals of the order of 3 hours. Data holdings include over 1500 recording months of data from some 60 sites across the continental shelf areas around the British Isles and the NE Atlantic between 1954 and 1995. Recording periods vary from 2 months at some sites to over 15 years. The longer series are noted here: Channel Lightvessel (49 54.4N, 002 53.7W; 01 Sep 1979 - 31 Dec 1985); Dowsing Lightvessel (53 34.0N, 000 50.2W; 01 May 1970 - 30 Apr 1971; 01 Nov 1975 - 30 Jun 1981; 01 Jan 1982 - 31 Dec 1982; 01 Jan 1984 - 31 Dec 1984); Ocean Weather Ship Lima (57 00.0N, 020 00.0W; 01 Jan 1975 - 31 Dec 1983); Saint Gowan Lightvessel (51 30.0N, 004 59.8W; 01 Aug 1975 - 31 Jul 1976; 01 Dec 1976 - 31 Dec 1983); Seven Stones Lightvessel (50 03.8N, 006 04.4W; 31 Jan 1962 - 31 Jan 1963; 01 Jan 1968 - 31 Dec 1969; 01 Jul 1971 - 30 Jun 1974; 01 Apr 1975 - 31 Dec 1985). The data originate primarily from UK and Irish laboratories and are managed by the British Oceanographic Data Centre. Data collection is ongoing at some sites (for example, Seven Stones Lighvessel) but these data are not managed by BODC. They are part of the Centre for Environment, Fisheries and Aquaculture Science (CEFAS) wavenet network.