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University of Leeds, School of Earth and Environment

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  • The Changing Arctic Ocean (CAO) data set comprises hydrographic data, including measurements of temperature, salinity and pigments. The study area was the Arctic Ocean, more specifically the Barents Sea. The data were collected by a research cruise from June to August 2016. Shipboard data collection involved the deployment of conductivity-temperature-depth (CTD) packages. The CAO programme aims to understand the changes in the Arctic marine ecosystem in a quantifiable way, which will allow computer models to help predict the consequences of these changes on, for example, surface ocean productivity, species distributions, food webs and ecosystems, and the services they provide (ecosystem services) . It is a NERC funded programme that draws on collaboration between the Scottish Association for Marine Science (SAMS), University of Liverpool (UoL), University of Leeds (ULeeds), University of Edinburgh, University of Oxford, Scottish Universities Environmental Research centre (SUERC), University of Strathclyde, University of St. Andrews, University of Southampton, University of Manchester, Durham University, University of Bristol, Universite Libre de Bruxelles, Sir Alister Hardy Foundation for Ocean Science (SAHFOS), National Oceanography Centre (NOC), Newcastle University, British Antarctic Survey (BAS) and Plymouth Marine Laboratory (PML), . The programme is divided in four projects with the following Principal Investigators : Arctic PRIZE (Arctic productivity in the seasonal ice zone), led by Finlo Cottier from SAMS, ARISE (Can we detect changes in Arctic ecosystems?), led by Claire Mahaffey from UoL, ChAOS (The Changing Arctic Ocean Seafloor), led by Christian Maerz from ULeeds and DIAPOD (Mechanistic understanding of the role of diatoms in the success of the Arctic Calanus complex and implications for a warmer Arctic), led by David Pond from SAMS. The majority of the data will be managed by the British Oceanographic Data Centre (BODC), with a minority of data sets (mainly related to biology) being submitted to the Polar Data Centre (BAS-PDC).

  • The dataset includes physical and biogeochemical measurements of water properties, meteorological data and biogeochemical measurements of sediment parameters. Temperature, salinity, turbidity, oxygen, nutrients, dissolved organic carbon/total dissolved nitrogen (DOC/TDN), particulate organic carbon/particulate organic nitrogen (POC/PON), contaminants and pH were measured at most of the data collection sites, with additional biogeochemical measurements collected at various locations. Temperature, salinity and nutrients are available for virtually all data collection campaigns. The data were collected in a number of estuaries around the UK between 1993 and 1997. The Humber estuarine data set was collected during a series of 33 campaigns on the EA vessels Sea Vigil and Water Guardian in the Humber, Trent and Ouse systems at approximately monthly intervals between June 1993 and December 1996. The measurements were taken over two or three one-day cruises that covered the estuary from the tidal limits of both Trent and Ouse to Spurn Point. Instrumental and sample data are available from a series of fixed stations that were sampled during every campaign. The Tweed estuarine data set was collected during a series of 13 campaigns using RV Tamaris and a rigid inflatable vessel at approximately monthly intervals between July 1996 and July 1997. Data were collected throughout the tidal reaches of the River Tweed. The dataset forms part of the NERC Land Ocean Interaction Study project. Key investigators for this LOIS sub-project included Plymouth Marine Laboratory. The data are held in the British Oceanographic Data Centre project database.

  • This dataset includes physical, biological and biogeochemical measurements of both the water column and seabed sediments. Hydrographic data include temperature, salinity, attenuance, dissolved oxygen, fluorescence, photosynthetically active radiation (PAR), sound velocity and current velocities, while biogeochemical analyses of water samples provided measurements of nutrients and biological sampling provided measurements of zooplankton abundance. A large number of benthic parameters were measured, including concentrations of substances such as nutrients, metals and carbon in both sediments and sediment pore waters. Benthic fauna were also studied, while rates of sedimentation flux were quantified. These oceanographic and benthic data were supplemented by satellite ocean colour imagery. The data were collected in the North Atlantic Ocean at the Mouth of Rockall Trough, Hatton-Rockall Basin and the Flank of Feni Drift between August 1997 and June 1999 over four cruises, comprising a preliminary site assessment (CD 107 August, 1997) followed by two process cruises (CD 111, April-May 1998, and CD 113, June-July 1998). A further cruise (CH 143) was part-funded by BENBO to retrieve moorings. The data were collected using a variety of instrumentation, including shipboard deployment of conductivity-temperature-depth (CTD) profilers with attached auxiliary sensors, benthic samplers, landers, cameras and incubation chambers, water samplers and continuous underway sensors. These were supplemented by moored sensor and satellite data. The BENBO programme was led by the Scottish Association for Marine Science/Dunstaffnage Marine Laboratory involved researchers from Southampton Oceanography Centre, Scottish Universities Research and Reactor Centre, Plymouth Marine Laboratory, Lancaster University, Leeds University, Edinburgh University, Cambridge University and the University of Wales, Bangor.