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  • The Ocean Surface Mixing, Ocean Sub-mesoscale Interaction Study (OSMOSIS) data set contains a variety of oceanographic measurements including a year long time series of the properties of the ocean surface boundary layer and its controlling 3D physical processes. The core observations include measurements of temperature, salinity, nutrients, currents and shear harvested from a suite of instrumentation including CTDs, ocean gliders, drifter buoys and moored sensors. OSMOSIS data were collected during three cruises. The first cruise undertook preliminary exploratory work in the Clyde Sea (September 2011) to hone techniques and strategies. The following cruises carried out mooring deployments and recovery in the vicinity of the Porcupine Abyssal Plain (PAP) observatory (in late Summer 2012 and 2013 respectively). Additional opportunist ship time being factored in to support the ambitious glider operations associated with OSMOSIS. This multiple year study will combine traditional observational techniques, such as moorings and CTDs, with the latest autonomous sampling technologies (including ocean gliders), capable of delivering near real-time scientific measurements through the water column. The OSMOSIS data set will contain high-resolution vertical measurements, which will shed light on the complex turbulent processes that drive the deepening of the OSBL and similarly the sub-mesoscale processes promoting OSBL re-stratification. Continuous mooring and glider measurements over a complete annual cycle will also provide invaluable insight into how the OSBL evolves over time. The NERC OSMOSIS Consortium brings together scientists from various UK research centres including the University of Southampton School of Ocean and Earth Sciences, University of Reading, Bangor and the National Oceanography Centre (NOC).

  • 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.

  • This dataset describes an evaluation project using ocean glider data collected in the Celtic Sea, funded by the United Kingdom Integrated Marine Observing Network (UK-IMON) initiative. The data measured form a three dimensional trajectory through the water column covering a transect from just North West of the Scilly Isles, to the South west in the Celtic Sea. The date span for the data is 12 September 2013 to mid-October 2013 (expected). Deployment occurred off the RV Cefas Endeavour on 12th September and it is expected that the gliders will be recovered in Mid October. The project includes 2 ocean gliders, both equipped with a CTD and triplet optical phytoplankton fluorescence, backscatter and coloured dissolved organic matter sensor. There is also an echo sounder (on one glider) and Sea Mammal Research Unit (SMRU) Passive Acoustic Monitor (PAM) (cetacean monitoring) on the other glider. The goal of the evaluation project is to study tidal mixing and to contribute to oceanographic sensor development. The organisations contributing to the dataset are the UK National Oceanography Centre (NOC), the Centre for Environment, Fisheries & Aquaculture Science (CEFAS) and the Sea Mammal Research Unit (SMRU). The data are held by BODC as an archive of the real time data stream as transmitted by the glider. The delayed mode full resolution (downloaded on platform recovery) and delayed mode quality controlled data are expected in due course.

  • This dataset consists of measurements of temperature, pressure and depth collected using conductivity-temperature-depth (CTD) casts, chlorophyll, water chemistry and biogenic silica data taken from CTD and underway samples, and underway meteorology, navigation and sea surface hydrography. Data were collected in the Southern Ocean, specifically the Drake Passage, Weddell Sea and Powell Basin, on the RRS James Clark Ross cruises JR255A (20th January to 03rd February 2012) and recovery cruise JR255B (04th February 22nd March 2012) Biogenic silica and chlorophyll samples were collected from the non-toxic underway and CTD Niskin bottles, filtered, dried and processed spectrophotometrically post-cruise. Similarly, water chemistry samples were collected, filtered and dried before post-cruise processing with an elemental analyser. A SeaBird CTD rosette was launched at stations throughout the cruise collecting temperature, pressure and depth values with an attached deep ocean thermometer collecting temperature data which were used to calibrate the CTD data. The underway oceanlogger was running through the duration of the cruises, excepting times for cleaning, entering and leaving port, and while alongside. The data were collected as part of the “Gliders: Excellent New Tools for Observing the Ocean (GENTOO)” project. The objectives of the GENTOO project are: (i) To quantify and understand the possible new source of dense water overflow and its variability; to determine the outflow's potential as an early indicator of Antarctic climate change; to assess the impact of changing dense overflows on the locations and strengths of the surface currents and frontal jets; to provide valuable constraints for climate models that describe how changes in ocean circulation feedback on and regulate climate change in polar latitudes. (ii) To determine the krill biomass distribution and (temporal and spatial) variability to the east of the Antarctic Peninsula and its likely impact on the circumpolar krill ecosystem; to assess the impact of any variations in the location of the frontal jets (from objective i) on the krill biomass distribution; to alleviate a severe regional lack of field data on krill, a key species in the Antarctic food web. To achieve the two objectives, our technological deliverable is a critical evaluation of our ability to measure (a) current velocity from a glider and (b) krill biomass from a glider. The data were collected under NERC lead grant NE/H01439X/1, with child grants NE/H014217/1, NE/H014756/1 and NE/H015078/1. The principal investigators were Prof. Karen Heywood,University of East Anglia, Environmental Sciences, Prof. Gwyn Griffiths, National Oceanography Centre, Science and Technology, Dr. Sophie Fielding, NERC British Antarctic Survey, Science Programmes and Dr. Stuart Bruce Dalziel, University of Cambridge, Applied Maths and Theoretical Physics, respectively. With regard the samples data (Biogenic silica, water chemistry and chlorophyll) it is important to note that these data ARE NOT the property of NERC. They belong to Walker Smith of the Virginia Institute of Marine Science(VIMS) who has supplied them in support of GENTOO. As such, he must be credited for use of the data. The CTD and underway navigation, meteorology and sea surface hydrography data have been received by BODC as raw files from the RRS James Clark Ross, are currently being processed and are available in raw format from BODC enquiries. The SBE-35 Deep Ocean Thermometer and biogenic silica, chlorophyll-a and particulate organic carbon/nitrogen samples data have been received by BODC as raw files from the RRS James Clark Ross, processed and quality controlled using in-house BODC procedures and will be made available online in the near future.

  • This dataset comprises hydrographic sections, together with measurements collected by ocean gliders and moored instrumentation deployed during the UK Overturning In the Subpolar North Atlantic Programme (UK-OSNAP). UK-OSNAP is the UK contribution to the International OSNAP Programme. The dataset also includes modelling output informed by the observations. OSNAP observations are focused on two lines: i) OSNAP West, extending from south Labrador to southwest Greenland and ii) OSNAP East from southeast Greenland to Scotland. Data collection commenced June 2014 and is ongoing. UK_OSNAP consists of cruises JR302, PE399, DY053, DY054, two alternating glider deployments, current meter moorings (five at Cape Farewell and three in the Rockall trough) and ADCPs in the Rockall Trough Shelf Edge Current. The model data addresses the Subpolar Gyre circulation and fluxes using data assimilation and theoretical analysis. The datasets assembled as part of UK-OSNAP provide a continuous record of full-depth, trans-basin mass, heat, and freshwater fluxes in the North Atlantic Subpolar Gyre. These, coupled with the associated modelling exercises help improve the understanding of the circulation and fluxes of the North Atlantic Subpolar Gyre. UK-OSNAP, funded by the Natural Environment Research Council (NERC) is led by the National Oceanography Centre (NOC). UK-OSNAP is a partnership between NOC, Scottish Association for Marine Science (SAMS), University of Oxford and the University of Liverpool. It is part of international OSNAP that is led by USA and includes 10 further partner groups in Canada, France, Germany, the Netherlands and China. Investigators: National Oceanography Centre (NOC): Dr Penny Holliday, Dr Sheldon Bacon, Dr Chris Wilson, Neill Mackay. Scottish Association for Marine Science (SAMS): Dr Stuart Cunningham, Prof Mark Inall, Loic Houpert. University of Oxford: Prof David Marshall, Dr Helen Johnson. University of Liverpool: Prof Ric Williams, Dr Vassil Roussenov. The full dataset is still being assembled and currently consists of near real time glider measurements made (to date) on the project, the mooring dataset and cruise data. NERC have added a 2-year extension to UK-OSNAP, until October 2020. This covers a 2-year deployment of 3 moorings in the Iceland Basin as partof the international OSNAP programme. The moorings will be recovered in 2020.

  • 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 General Bathymetric Chart of the Oceans (GEBCO) One Minute Grid is a global terrain model for land and sea at one arc-minute intervals. The grid is largely based on the bathymetric contours contained in the Centenary Edition of the GEBCO Digital Atlas, existing grids are used in some areas. The land areas are based on the Global Land One-km Base Elevation (GLOBE) Project data set. The grid was originally released in 2003 and updated in 2008 to include data from the International Bathymetric Chart of the Arctic Ocean (IBCAO), for the region north of 64N and also updates for shallower water regions off India, the Korean Peninsula and around South Afriaca, using data extracted from Electronic Navigation Charts (ENCs). The grid is available to download, in netCDF format, for free from the internet. Free software is available for viewing and accessing data from the grid in netCDF and ASCII. This includes an option to export the grid in an ASCII form suitable for conversion to an ESRI raster. The grid is also included in the GEBCO Digital Atlas DVD. It is not intended to make any further updates to this data set. In 2009, GEBCO released a new bathymetric grid, the GEBCO_08 Grid. This is a global terrain model at 30 arc-second intervals. It is largely based on a database of ship-track soundings with interpolation between soundings guided by satellite derived-gravity data.

  • 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 Global Sea Level Observing System (GLOSS) 'Delayed-mode' Data Assembly Centre at the British Oceanographic Data Centre (BODC) quality controls and archives high frequency (i.e. hourly or more frequent) global sea level data and any ancillary measurements (e.g. temperature, wind speed/direction, atmospheric pressure) that are included with the data. The tide gauges are situated on most coastlines, and data cover the Arctic to the Antarctic, and the Atlantic, Indian and Pacific oceans. The main component of GLOSS is the 'Global Core Network' (GCN) of 290 sea level stations around the world for long term climate change and oceanographic sea level monitoring. The Core Network is designed to provide an approximately evenly-distributed sampling. The GLOSS Long Term Trends (LTT) set of gauge sites (some, but not all, of which are in the GCN) are used for monitoring long term trends and accelerations in global sea level. The GLOSS altimeter calibration (ALT) set consists mostly of island stations, and provides a facility for mission intercalibrations. A GLOSS ocean circulation (OC) set, including in particular gauge pairs at straits and in polar area, complements altimetric coverage of the open deep ocean. Data exist from the mid 1800s up to the present day, with particularly long records from Newlyn, U.K.; Brest, France; Prince Rupert, Canada and Honolulu, San Diego and San Francisco, U.S.A.; Sea level has been measured by a variety of different instruments with the historical data mainly coming from mechanical float gauges. More recent technologies include acoustic, pressure, and radar instruments. GLOSS aims at the establishment of high quality global and regional sea level networks to create long‐term sea level records. These records, as well as being used in climate studies (sea level rise), are also used in oceanography (ocean currents, tides, surges), geodesy (national datum), geophysics and geology (coastal land movements) as well as various other disciplines. The programme became known as GLOSS as it provides data for deriving the 'Global Level of the Sea Surface'. GLOSS is an international programme conducted under the auspices of the Joint Technical Commission for Oceanography and Marine Meteorology (JCOMM) of the World Meteorological Organisation (WMO) and the Intergovernmental Oceanographic Commission (IOC). Data are collected by local agencies such as port authorities, universities and navies and sent to or downloaded by the data centre.

  • This dataset consists of measurements of density, electrical conductivity, sound velocity and travel time, salinity, depth and temperature of the water column. The data were acquired from the RV Falcon Spirit, the Plymouth University vessel. The small 14m catamaran was used on a daily basis from 13 May 2012 to 24 May 2012 in the Celtic Sea, off the Cornish coast, with the idea to capture high-quality, spatially-resolved field data ahead of the Wave Hub construction. Measurements were collected using CTDs, moored temperature loggers, ADCP, VMADCP and towed minibat CTD. These cruises formed the field component of NERC Discovery Science project "Wave Hub baseline study". The aims of the research were to obtain a detailed oceanographic study at the Wave Hub site and surrounds - covering the whole range of physical, chemical and biological parameters before the deployment of Wave Hub infrastructure and wave energy devices – and to ensure data acquisition in time and space to allow development of physical and ecosystem models at scales relevant to wave arrays. Ultimately models will make predictive assessments of the extent, timescales and intensity of ecosystem impacts and perturbation resulting from implementation of wave energy arrays. Other aims include: engagement of environmental economists to ensure the data can be used to develop economic valuation estimates of critical life-supporting ecosystem services at scales appropriate to arrays of wave devices for comparison with other uses of marine space and to address questions that have arisen directly in respect of marine renewable energy development and sustainable use of marine resources. The Discovery Science project was composed of Standard Grant reference NE/I015094/1 as the lead grant with child grants NE/I015183/1 and NE/I015108/1. The lead grant, NE/I015094/1, ran from 01 August 2010 to 31 July 2012, with Dr Ricardo Javier Torres, Plymouth Marine Laboratory, as principal investigator. The child grant NE/I015183/1 ran from 01 August 2010 to 31 July 2011, led by Professor Michael Richard Belmont, University of Exeter. The second child grant, NE/I015108/1, ran from 03 December 2010 to 31 July 2012, led by Dr Philip John Hosegood, University of Plymouth. All data detailed here were received by BODC as raw files from the RV Falcon, processed and quality controlled using in-house BODC procedures. Towed undulator CTD data and temperature logger data have been processed to completion and are available online on the BODC website. The remaining data will be made available in the near future.