This dataset includes the CNRM-CM5 model output prepared for SPECS seaIceInit (1979-2012). These data were prepared by the Centre National de Recherches Meteorologiques, as part of the SPECS project. The model used is CNRM-CM, combining ARPEGEv6.0.3 + NEM0v3.2 + GELATO6.0.1 + SURFEX7.2, frequency is monthly. Atmospheric variables are: clt evlwr hfls hfss hus mrro mrso pr prsn psl rlds rls rlut rsds rsdt rss ta tas tasmax tasmin tauu tauv ua uas va vas zg Oceanic variables are: hfnorth mlotst msftmyz msftmyza msftmyzba sltnorth so t20d thetao tos uo vo SeaIce variables are: sic sit snld strairx strairy tsice usi vsi

SPECS will undertake research and dissemination activities to deliver a new generation of European climate forecast systems, with improved forecast quality and efficient regionalisation tools to produce reliable, local climate information over land at seasonal-to-decadal time scales, and provide an enhanced communication protocol and services to satisfy the climate information needs of a wide range of public and private stakeholders. A core set of common experiments has been defined, to which most forecast systems will contribute. Another set of coordinated experiments, tier 1, includes the experiments that one or more forecast systems are planning to run. A standard seasonal experimental set up will consist of ten-member ensembles, with two start dates per year (first of May and November) over the 1981-2012 period and seven-month forecast length. The standard decadal experimental set up consists in five-member ensembles, starting on the first of November (or some time close to that date) of the years 1960, 1963, 1965, 1968, 1970, 1973, 1975, 1978, 1980, 1983, 1985, 1988, 1990, 1993, 1995, 1998, 2000, 2003, 2005, 2008, 2010, 2013, with a five-year forecast length. A description of the main experiments, with the minimum contribution in terms of start dates, forecast length and ensemble size follows: 1 - Assessment of the impact of soil-moisture initial conditions (seasonal): contributing EC-Earth, IFS/NEMO (ECMWF), CNRM-CM5 (MeteoF), UM, MPI-ESM (MPG); 2 - Assessment of the impact of sea-ice initialization (interannual); contributing EC-Earth (IC3), IPSL-CM5, CNRM-CM5 (MeteoF), UM, MPI-ESM (MPG) 3 - Assessment of impact of increased horizontal resolution (seasonal and decadal); contributing CNRM-CM5 (CERFACS, decadal; MeteoF, seasonal), EC-Earth (IC3, seasonal; KNMI and SMHI, decadal), MPI-ESM (MPG, seasonal and decadal), IPSL-CM5 (decadal), UM (seasonal and decadal); 4 - Assessment of impact of an improved stratosphere (seasonal and decadal) including interannually-varying ozone; contributing EC-Earth (KNMI seasonal with ozone; SMHI decadal), IFS/NEMO (ECMWF, seasonal), CNRM-CM5 (MeteoF, seasonal), UM (seasonal, decadal); 5 - Assessment of impact of additional start dates (decadal); contributing EC-Earth (KNMI, SMHI), MPI-ESM (MPG), IPSL-CM5. SPECS research has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under SPECS project (grant agreement n° 308378).

This dataset includes the ECMWF-IFS4 model output prepared for SPECS SnowInit (2004-2014). These data were prepared by the European Centre for Medium-range Weather Forecasting (ECMWF), as part of the SPECS project. Model id is IFS4 (atmosphere: IFS4(201505212,CY42R1,N128TL255L91); ocean:NEMO3.4.1(L34E5,ORCA1_Z42,1°L42); seaice:N/A; MACC:N/A; land:CHTESSEL,ERA-Interim forcing, lakes, fixed glaciers (CY41R1, internal exp.id gd80, climate.v012); wave:WAM(CY41R1,1°); ozone:Cariolle(v2.9); climversion:climate.v012), no external forcing. frequency is daily and monthly. Daily Atmospheric variables are: clt pr psl rlut rsds tas tasmax tasmin tdps uas vas Monthly atmos variables: al clt hfls hfss mrso pr psl rls rlut rsds rsdt rss rsut snld ta tas tasmax tasmin tdps uas vas zg

This dataset includes the CERFACS-HR model output prepared for SPECS horizlResImpact (1993-2009). These data were prepared by the European Centre for Research and Advanced Training in Scientific Computation (CERFACS), as part of the SPECS project. Model id is CERFACS-HR (atmosphere: ARPEGE v5.3; ocean: NEMO v3.4 including LIM2 sea-ice; coupler: OASIS3-MCT v2.0" ), frequency is daily and monthly. Daily Atmospheric variables are: snld Daily Ocean variables: mlotst t20d Daily sea ice variables: sic tsice Monthly sea ice variables: sic sit snld strairx strairy tsice usi vsi Monthly ocean variables: mlotst so t20d thetao tos uo vo wo zos

This dataset includes the CNRM-CM5 model output prepared for SPECS snowInit (1991-2012). These data were prepared by the Centre National de Recherches Meteorologiques, as part of the SPECS project. Model id is CNRM-CM5, frequency is daily, associated model is atmo HR ocean HR. Arpege V5.1 is the underlying model, 31 vertical levels (CNRM-CM5 2013 atmosphere:Arpege (tl127l91r); ocean:Nemo (Orca1); sea-ice:Gelato; land:isba. Atmospheric variables are: hfls hfss pr psl rlds rls rsds rss ta tas tasmax tasmin zg

This dataset includes the ECMWF-IFS model output prepared for SPECS seasonal (1981-2012). These data were prepared by the European Centre for Medium-range Weather Forecasting (ECMWF), as part of the SPECS project. Model id is IFS (IFS C36R4), frequency is daily and monthly. Daily Atmospheric variables are: rlut Monthly atmos variables: al clt hfls hfss mrso pr psl rls rsds rss snld tas tdps uas vas Monthly ocean variables: mlotst sos t20d thetao tos uo vo

This dataset includes the Met Office GloSea5 model output prepared for SPECS horizlResImpact (1996-2009). These data were prepared by the Met Office Hadley Centre, as part of the SPECS project. Model id is GloSea5 (GloSea5: HadGEM3-AO (GC2); atmosphere: UM (GA6.0) ; ocean: NEMO (v3.4, ORCA0.25) ; coupler: OASIS3 (v3.3); sea ice: CICE), frequency is daily and monthly. Daily Atmospheric variables are: pr psl rls rlut tas tasmax tasmin Monthly atmos variables: pr psl ta tas zg Monthly seaIce variables: sic sit snd Ocean variables: so thetao tos uo vo

This dataset includes the MPI-ESM-LR model output prepared for SPECS seaIceInit (1991-2012). These data were prepared by the Max Planck Institute for Meteorology (MPI-M), as part of the SPECS project. Model id is MPI-ESM-LR (MPI-ESM-LR 2013; atmosphere: ECHAM6 v6.1.0.0 (REV: 2595), T63L47; land: JSBACH (REV: v2.01); ocean: MPIOM (REV: 3151) marine biogeochemistry HAMOCC included, GR15L40; sea ice (REV: 3151): . Frequency is daily and monthly. Daily Atmospheric variables are: clt hfls hfss mrso pr prc psl rlds rlut rsds tas uas vas Monthly atmos variables: hus pr psl ta tas ua va zg Monthly ocean variables: mlotst tos Monthly land variables: mrro mrso

This dataset includes the Met Office GloSea5 model output prepared for SPECS aerosols (1992-2012). These data were prepared by the Met Office Hadley Centre, as part of the SPECS project. Model id is GloSea5 (GloSea5: HadGEM3 v3.0 (2014); atmosphere: UM (GA3.0) ; ocean: NEMO (v2, ORCA0.25) ; coupler: OASIS3 (v3.3); sea ice: CICE), frequency is daily and monthly. Daily Atmospheric variables are: pr psl rls rlut tas tasmax tasmin Monthly atmos variables: pr psl ta tas zg Monthly seaIce variables: sic sit snd Ocean variables: so thetao tos uo vo

This dataset includes the CNRM-CM5 model output prepared for SPECS SoilMoistureInit (1991-2012). These data were prepared by the Centre National de Recherches Meteorologiques, as part of the SPECS project. Model id is CNRM-CM5, frequency is daily. Arpege V5.1 is the underlying model, 31 vertical levels (CNRM-CM5 2013 atmosphere:Arpege (tl127l91r); ocean:Nemo (Orca1); sea-ice:Gelato; land:isba. Atmospheric variables are: hfls hfss pr psl rlds rls rsds rss ta tas tasmax tasmin zg