These data represent monthly values (monthly mean and monthly mean diurnal cycle [3 or 6 hourly]) of selected variables for ENSEMBLES (http://www.ensembles-eu.org). The list of output variables can be found in: http://ensembles.wdc-climate.de/output-variables. ENSEMBLES transient experiment (Ensembles A1B-450ppm equivalent CO2 stabilisation scenario 2001-2100). The experiment has been initialized in year 2000 of the 20C3M_2 run and continues until year 2100 with anthropogenic forcings included: CO2,CH4,N2O,CFC11(including other CFCs and HFCs),CFC12; sulfate(Boucher) and land-use according to A1B-450 scenario. These datasets are available in netCDF format. The dataset names are composed of - centre/model acronym (e.g. IPCM4: Institut Pierre Simon Laplace) - scenario acronym (e.g. E1: A1B-450) - run number (e.g. 1: run 1) - time interval (MM:monthly mean, DM:daily mean, DC:diurnal cycle, 6H:6 hourly, 12h:12hourly) - variable acronym [with level value] (e.g. hur850: relative humidity, 850 hPa) example: IPCM4_E1_1_MM_hur850 For this experiment 3 ensemble runs were carried out. Technical data to this experiment: IPSLCM4_v2 (2007) : atmosphere : LMDZ4 (LMDZ4_V3_4, 144x143x19) ; ocean ORCA2 (ipsl_cm4_v2, 2x2L31); sea ice LIM (ipsl_cm4_v2); land ORCHIDEE (orchidee_1_9_3) The output from the model run is stored in: mercure.ccc.cea.fr:/dmnfs09/cont003/p86denv/IGCM_OUT/IPSLCM4_v2/LUE1R2