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1993

35 record(s)
 
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  • The SAM II instrument, aboard the Earth-orbiting Nimbus 7 spacecraft, was designed to measure solar irradiance attenuated by aerosol particles in the Arctic and Antarctic stratosphere. The scientific objective of the SAM II experiment was to develop a stratospheric aerosol database for the polar regions by measuring and mapping vertical profiles of the atmospheric extinction due to aerosols. This database allows for studies of aerosol changes due to seasonal and short-term meteorological variations, atmospheric chemistry, cloud microphysics, and volcanic activity and other perturbations. The results obtained are useful in a number of applications, particularly the evaluation of any potential climatic effect caused by stratospheric aerosols. This dataset collection contains 14 years of polar Arctic and Antarctic aerosol extinction profiles, atmospheric temperature and pressure data obtained from the Stratospheric Aerosol Instrument II (SAM II) on the NIMBUS 7 satellite.

  • This dataset comprises linear and areal habitat information and vegetation species recorded during an ecological survey of stratified random 1km square sites across England in 1992 and 1993. The survey was carried out by the Institute of Terrestrial Ecology (which later became part of the Centre for Ecology & Hydrology (CEH)) and was commissioned in order to carry out survey work into habitats which were perceived to be under threat or which represented areas of concern to the Department for the Environment (named as 'Key Habitats'). The habitats (or landscape types) in question were: Lowland heaths, chalk and limestone grasslands, coasts and uplands. The survey was designed to complement CEH's national ecological survey, the 'Countryside Survey'. Full details about this dataset can be found at https://doi.org/10.5285/7aefe6aa-0760-4b6d-9473-fad8b960abd4

  • The Lexicon of Named Rock Units provides definitions of lithostratigraphic, lithodemic, and litho-morpho-genetic geological units of the United Kingdom and its associated continental shelf. The Lexicon focuses mainly on units of Member, Formation, Group and higher rank (and equivalents) but it also includes information on some units of lesser rank, notably economically important coal seams and laterally extensive marine bands. It includes superficial and bedrock units. It includes synonyms and other names not currently recognised by the BGS or regarded as obsolete. Full Lexicon entries include geological unit name, a persistent unique identifier, map code, currency, rank, parent unit and rank, age, lithology, definitions of boundaries, thickness, previous and alternative names, geographical extent, type localities, and bibliographical references.

  • This dataset represents a project-based collection of seismic interpretations of 2D and 3D commercial seismic reflection data. These data are integrated in a relational database in ORACLE in a data model called OpenWorks. Well log data, stratigraphic, velocity and well and seismic location data are also held in the database. Data interpretations are held within project indices by interpreter. Interpretations include faults and lithostratigraphic horizons. All data are commercial-in-confidence and cannot be supplied to any third party without the explicit permission of the customer or supplier.

  • Over 22000 km of corrected aeromagnetic total intensity data from various surveys in offshore petroleum areas in UK Continental Shelf and overseas collected to assist directional drilling. Line separation is 2 km and flight altitude is 80 m above sea level and navigation is by GPS (Global Positioning System). Some surveys have been bought or commissioned on an exclusive basis by BGS and can be used without further ado, others require permission sought from the aeromagnetic survey company or end-client.

  • MONA LISA (Marine and Onshore North Sea Acquisition for Lithospheric Seismic Analysis) seismic data was acquired by BIRPS (the British Institutions Reflection Profiling Syndicate) across the Ringkobing-Fyn High of the central North Sea were designed to study the crust near a hypothesized Caledonian age triple junction associated with the colliding continental crust of Laurentia, Avalonia (Gondwanaland) and Baltica. The specific target was the eastward continuation of the Caledonian Front (Iapetus Suture), as previously recognised on NEC (North East Coast line), MOBIL (Measurements over Basins to Image Lithosphere), NSDP (North Sea Deep Profile) and BABEL (Baltic and Bothnian Echoes from the Lithosphere) profiles, in northern Europe. 1112 km of data were acquired, recorded to 26 s two-way time.

  • This dataset (GSE_SPECIMENS) is an index of the specimens and palaeontological slides held in the Type and Stratigraphical (T&S) Collection of Scotland and Northern England. This index along with GSE_REFERENCES (List Of Specimens From The UK (North) Type And Stratigraphical Collection And Related Publications) and to some extent SMITH_GSE (Index To Specimens Transferred From The John Smith Collection To The UK (North) Type and Stratigraphical Collection) are the digital equivalents of the analogue card index (held in BGS Edinburgh). The latter contains c.16k records, of which perhaps 25% have been transcribed. The sporadically growing T&S Collection (which is derived from the Survey Collection) comprises some 16k specimens. About 11k are housed at BGS Keyworth and c.5k remain at BGS Edinburgh. The specimens are individually registered in 5 leather bound volumes. These are held in BGS Keyworth, but equivalent information (microfilm and paper records) is held in BGS Edinburgh. For each specimen, the MS Access database MTD_GSE_SPECS provides a link with the Survey Collection, gives nomenclatural, taxonomical, geographical and stratigraphical information, an indication on where the fossil is housed, and any comments, perhaps on the state of preservation.

  • Laboratory results for the analysis of soil samples collected from urban areas during the baseline geochemical mapping programme of Britain. Sample sites are described on field slips. Chemical results are subjected to high level of quality control in the laboratory. Results are the raw data processed (standardisation and normalisation) to give seamless geochemical images and the value added G-BASE (Geochemical Baseline Survey of the Environment) data in the BGS geochemistry database.

  • WESTLINE was acquired by BIRPS (the British Institutions Reflection Profiling Syndicate). The seismic data image the faulted conjugate margins of the Rockall Trough and the intrabasinal sediments. The seismic data were shot to 18 s two-way time along a single 450 km-long transect.

  • The BGS Rock Classification Scheme (RCS) is a comprehensive classification scheme for all types of rocks and unconsolidated sediments worldwide. It is intended to be used for classification of single rock samples and can be used without any knowledge of field relationships. It has been designed for use by people with a wide range of geological knowledge; from experienced professional geologists to technicians and drillers. It also allows names to be assigned according to the level of information about the sample. The system if hierarchical, ranging from very simple names such as igneous rock to highly detailed names such as mugearite, that can only be applied after chemical analysis. Rock names can consist of a root name e.g. granite and several qualifiers that impart more information e.g. grey-biotite-bearing granite. The classification scheme has been implemented as a hierarchical dictionary of codes for all rock types. The classification scheme is described in BGS Research Reports 99-02, 99-03, 99-06. The BGS Rock Classification Scheme was devised between 1993 and 1996 in response to a need from the Digital Map Production System project.