e6edf4076e7e42f681f495ccf0ec22cb English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 3a9c171d7f1c4441ba8ffb9c2c22b81e dataset Centre for Environmental Data Analysis (CEDA) 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointOfContact 2026-05-06T02:17:41 UK GEMINI 2.3 WGS 84 20 and 30 year climatologies from CMIP3 climate model output as used in the 2007 IPCC Fourth Assessment Report (AR4) 2021-06-01T20:39:47 publication 2021-06-01T20:39:47 creation https://catalogue.ceda.ac.uk/uuid/e6edf4076e7e42f681f495ccf0ec22cb e6edf4076e7e42f681f495ccf0ec22cb Centre for Environmental Data Analysis (CEDA) Climatology data used in Climate Change 2007, the Fourth Assessment Report (AR4) of the United Nations Intergovernmental Panel on Climate Change (IPCC) calculated from Coupled Model Intercomparison Project Phase 3 (CMIP3) model output. Simulations of global climate models were run by various climate modelling groups coordinated by the World Climate Research Programme (WCRP) on behalf of the IPCC. Climatology data was calculated from global climate model simulations of experiments representative of Special Report on Emission Scenarios (SRES) scenarios: A1b, A2, B1, the commitment scenario experiment (COMMIT), the twentieth century experiment (20C3M), the pre-industrial control (PICTL) and the idealised experiments 1PCTO2X and 1PCTO4X. The AR4 climatologies are 20-year period averages. 30-year period averages have also been calculated for comparison with the IPCC Third Assessment Report (TAR). The monthly climatology data covers the period from 1850-2100. The climatologies are of global scope and are provided on latitude-longitude grids. The period averages are: 20x: 20-year averages [+20-39, +46-65, +80-99, +180-199] as used in chapter 10 of IPCC 2007, 30a: 30-year averages [+01-30, +31-60, +61-90] as used in the observed climatologies, 30b: 30-year averages [+10-39, +40-69, +70-99] for compatibility with the IPCC 3rd Assessment Report (TAR). The climatology period averages listed above are relative to AD2000 for SRES scenarios A1B, A2, B1, and the commitment scenario COMMIT, relative to AD1900 for the twentieth century run (20C3M) and relative to the start of the experiment for the pre-industrial control (PICTL) and the 1PCTO2X and 1PCTO4X runs. Data files are 'tar' files with names of the form [model]_[experiment]_[variable]_{climatology}.tar. The experiments in this dataset include the SRES future scenarios: A1B Globalisation with rapid economic growth, A2 Regionalisation with regionally oriented economic development, B1 Globalisation with global environmental sustainability. Also: COMMIT simulation of climate change we are committed to given the current loading of greenhouse gasses and zero future emissions. PICTL the pre-industrial control. 20C3M the 20th century climate simulaiton. 1PTO2X and 1PTO4X idealised simulaitons where the concentration of atmospheric carbon dioxide (CO2) is increased by 1 percent per year from pre-industrial concentration until reaching 2x and 4x the original concentration. The dataset is comprised of monthly mean surface data for the following atmospheric variables: specific humidity, precipitation flux, air pressure at sea level, surface downwelling shortwave flux in air, air temperature, air temperature daily max, air temperature daily min, eastward wind, northward wind. Solomon, Susan Unavailable author Unavailable author Qin, Dahe Unavailable author Unavailable author Manning, Martin Unavailable author Unavailable author Centre for Environmental Data Analysis (CEDA) custodian 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk custodian Centre for Environmental Data Analysis (CEDA) data_owner 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk owner Centre for Environmental Data Analysis (CEDA) distributor 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor Manning, Martin Unavailable principal_investigator Unavailable principalInvestigator Qin, Dahe Unavailable principal_investigator Unavailable principalInvestigator Solomon, Susan Unavailable principal_investigator Unavailable principalInvestigator Centre for Environmental Data Analysis (CEDA) point_of_contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk pointofContact Centre for Environmental Data Analysis (CEDA) publisher 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk publisher unknown dataset IPCC DDC AR4 CMIP3 SRES COMMIT PICTL 20C3M 1PCTO2X 1PCTO4X Climate Change atmospheric conditions theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication otherRestrictions Public data: access to these data is available to both registered and non-registered users. otherRestrictions Under the following licence http://creativecommons.org/licenses/by/4.0/, 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 -180.0 180.0 -90.0 90.0 1850-01-01T00:00:00 2100-12-31T23:59:59 netcdf Centre for Environmental Data Analysis (CEDA) Data Center Contact 01235446432 Rutherford Appleton Laboratory Harwell Oxon OX11 0QX United Kingdom support@ceda.ac.uk distributor https://catalogue.ceda.ac.uk/uuid/e6edf4076e7e42f681f495ccf0ec22cb CEDA Data Catalogue Page Detail and access information for the resource information http://data.ceda.ac.uk/badc/ipcc-ddc/data/netcdf/ar4_v2 DOWNLOAD Download Data download https://pcmdi.llnl.gov/ipcc/model_documentation/ipcc_model_documentation.html CMIP3 Climate Model Documentation No further details. information https://ipcc.ch/pdf/special-reports/spm/sres-en.pdf Special Report on Emission Scenarios (SRES) No further details. information https://www.ipcc.ch/assessment-report/ar4/ Climate Change 2007, the Fourth Assessment Report (AR4) of the United Nations Intergovernmental Panel on Climate Change (IPCC) No further details. information dataset 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 Climatology data calculated from global climate model simulations for a variety of experiments from the Coupled Model Intercomparison Project Phase 3 (CMIP3).