41a6e20ba98c4913ea6893e2fcb5aec5 English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 series series NCAS British Atmospheric Data Centre (NCAS BADC) +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk pointOfContact 2026-05-06T02:29:21 UK GEMINI 2.3 WGS 84 Firn Record of Trace Gases Relevant to Atmospheric Chemical Change over 100 yrs (FIRETRACC/100) 2006-12-10T03:03:33 publication 2006-12-10T03:03:33 creation https://catalogue.ceda.ac.uk/uuid/41a6e20ba98c4913ea6893e2fcb5aec5 41a6e20ba98c4913ea6893e2fcb5aec5 NCAS British Atmospheric Data Centre (NCAS BADC) This data was collected as a result of the FIRETRACC/100 (Firn Record of Trace Gases Relevant to Atmospheric Chemical Change over 100 yrs) project conducted in 1998 and 1999. The FIRETRACC project aimed to determine the history of numerous trace gases of both human (pollution) and natural origin over the 20th century in the global atmosphere. This was achieved by pumping old air out of deep unconsolidated snow (known as firn) that accumulates to depths of around 50 to 100 m on the polar ice caps of both hemispheres. The resulting firn air samples from the Arctic and Antarctic were returned to Europe and the US for multiple gas and isotope analysis in a number of research laboratories. The firn air samples were analysed for well over eighty separate trace gases (halocarbons, non-methane hydrocarbons, alkyl nitrates, sulphur species, etc.), and thirteen different isotopic measurements of CO2, CH4, CO and permanent gases (O2, N2, Ar, Kr). In summary, the objectives of FIRETRACC/100 are as follows: * To determine the global trends of trace gases relevant to troposphericchemistry over the 20th century. These will include CO, the isotopiccomposition of CO, hydrocarbons, alkyl nitrates, numerous OH-reactivehalocarbons (such as methyl chloride, methyl chloroform, methyl bromide,hydrochlofluorocarbons, etc.), and sulphur gases (COS, CS2, etc.). Trends of longer lived gases will also be determined for dating purposes (CO2, CFCs,SF6, perfluorocarbons, etc.) * Determine the evolution of inter-hemispheric ratios of OH-sensitive species to constrain modelled global OH fields * Examine ratios of parent hydrocarbons to alkyl nitrates to place constraints on NOX fields in models * Elucidate the sources of CO from isotopic studies and use to deconvolute CO/methane coupling in models * Reconstruct the history of ozone, OH and tropospheric oxidising capacity over the past 100 years using full chemistry 2-D models * Determine the influence of 20th century industrialisation on the gas phase composition and chemistry of the lower atmosphere The data consists of ‘primary’ data comprising simple concentration versus depth profiles, and for selected gases also ‘secondary’ data comprising reconstructed historical trends. The firn diffusion model, used in the model reconstruction, is also available through this site. EU FIRETRACC Campaign participants author unknown author Atlas, Elliot Unavailable author Unavailable author Barnola, J-M Unavailable author Unavailable author Brenninkmeijer, Carl Unavailable author Unavailable author Mulvaney, R. Unavailable author Unavailable author Schwander, J. Unavailable author Unavailable author Sturges, William T. Unavailable author Unavailable author Penkett, M. Unavailable author Unavailable author Penkett, Stuart A. Unavailable author Unavailable author Chappellaz, J. Unavailable author Unavailable author Jouzel, J. Unavailable author Unavailable author NCAS British Atmospheric Data Centre (NCAS BADC) custodian +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk custodian NCAS British Atmospheric Data Centre (NCAS BADC) distributor +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk distributor NCAS British Atmospheric Data Centre (NCAS BADC) point_of_contact +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk pointofContact NCAS British Atmospheric Data Centre (NCAS BADC) publisher +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk publisher unknown series FIRETRACC Chemistry Aerosols atmospheric conditions theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication otherRestrictions Please contact the data centre for assistance on accessing data from this dataset collection. otherRestrictions Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. grid English climatologyMeteorologyAtmosphere -83.0 125.0 -78.0 76.0 1998-03-31T23:00:00 1998-04-29T23:00:00 Contact data centre for format details. NCAS British Atmospheric Data Centre (NCAS BADC) Data Center Contact +44(0)1235 446432 British Atmospheric Data Centre STFC Rutherford Appleton Laboratory Harwell Oxford OX11 0QX UK badc@rl.ac.uk distributor https://catalogue.ceda.ac.uk/uuid/41a6e20ba98c4913ea6893e2fcb5aec5 CEDA Data Catalogue Page Detail and access information for the resource information http://cordis.europa.eu/env/home.html The European Commission Environment and Climate Programme (4th Framework) website No further details. information http://cdiac.esd.ornl.gov/home.html Carbon Dioxide Information Analysis Center No further details. information https://www.bas.ac.uk/ British Antarctic Survey No further details. information http://www.climate.unibe.ch/ Climate and Environmental Physics, University of Bern No further details. information http://nsidc.org/noaa/ National Snow and Ice Data Centre No further details. information https://artefacts.ceda.ac.uk/badc_datadocs/firetracc/firetracc_help.html BADC Doc: FIRETRACC Help file No further details. information https://artefacts.ceda.ac.uk/badc_datadocs/firetracc/references.html BADC Doc: FIRETRACC List of References No further details. information series Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Please see data lineage statements for each dataset within this collection for data lineage details.