Below you will find several lists of related initiatives, organizations, stakeholders and partners.

• CHFP (Climate-system Historical Forecast Project)
• CliC (Climate and Cryosphere Project)
• GEWEX (Global Energy and Water Cycle Experiment)
• GEWEX GASS (Global Atmospheric System Studies)
• GEWEX GLASS (Global Land/Atmosphere System Study)
• GHP (GEWEX Hydroclimatology Panel)
• GSOP (Global Synthesis and Observations Panel) of CLIVAR
• Ice-HFP (Sea Ice Historical Forecast Project)
• ASPeCT (Antarctic Sea Ice Processes and Climate) of SCAR/CliC 
• SPARC (Stratosphere-troposhere Processes And their Role in Climate)
• SNAP (SPARC Stratospheric Network for the Assessment of Predictability)
• S2S (Subseasonal to Seasonal Prediction Project)
• PCPI (WCRP Polar Climate Predictability Initiative)
• WGSIP (Working Group on Seasonal to Interdecadal Prediction)

WWRP (World Weather Research Programme)

• GAW (Global Atmosphere Watsch Programme) EPAC
• WWRP Nowcasting an Mesoscale Research WG
• WWRP SERA WG
• HIWeather (WWRP High Impact Weather Project) 

• Africa THORPEX
• Asia THORPEX
• Europe THORPEX
• North America THORPEX
• Southern Hemisphere THORPEX
• THORPEX DAOS WG (THORPEX Data Assimilation Observing System)
• THORPEX GIFS-TIGGE (Global Interactive Forecast System THORPEX Interactive Grand Global Ensemble)
• THORPEX PDP WG (THORPEX Predictability and Dynamical Processes)

• JWGFVR (Joint Working Group on Forecast Verification Research) 
• WGNE (JSC/CAS Working Group on Numerical Experimentation)
• WWRP SERA WG

• ET-OFPS (Expert Team on the Operational Weather Forecasting Process and Support) under OPAG-DPFS (Data-Processing and Forecasting System)
• ET-OPSLS (Joint CBS-CCl Expert Team on Operational Predictions from Sub-Seasonal to Longer-Time Scales)
• OPAG-IOS (Open Programme Area Group on Integrated Observing Systems)
• WMO Lead Centre for Long-Range Forecast Multi-Model Ensemble
• WMO Lead Centre for the Long Range Forecast Verification System

• CAS (WMO Commission for Atmospheric Sciences)
• EC-PHORS (EC Panel on Polar and High Montain Observations, Research and Services)
• THORPEX ICSC (THORPEX International Core Steering Committee)
• WCRP JSC (World Climate Research Programme Joint Scientific Committee)
• WWRP SSC (World Weather Research Programme Scientific Steering Committee)

• ACCESS (Arctic Climate Change, Economy and Society)
• Arctic ECRA (European Climate Research Alliance)
• Arctic ROOS (Arctic Regional Ocean Observing System)
• IASC (International Arctic Science Committee) Atmosphere Working Group
• IICWG (International Ice Charting Working Group)
• PSTG (Polar Space Task Group)
• SAON (Sustaining Arctic Observing Networks)
• SCAR (Scientific Committee on Antarctic Research)
• SEARCH (Study of Environmental Arctic Change)

• AARI (Arctic and Antarctic Research Institute, Russia)
• AWI (Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Germany)
• Antarctica New Zealand
• AOMIP [GS2] (Arctic Ocean Model Intercomparison Project)
• Arctic Council
• Arctic Council Indigenous People’s Secretariat
• Arctic-HYDRA (The Arctic Hydrological Cycle Monitoring, Modelling and Assessment Program)
• ARCUS (Arctic Research Consortium of the United States)
• ArcticRIMS (A Regional, Integrated Hydrological Monitoring System for the Pan-Arctic Land Mass)
• ArcticNet (Canada)
• APECS (Association of Polar Early Career Scientists)
• Australian Antarctic Division
• BASC (US Board on Atmospheric Sciences and Climate)
• British Antarctic Survey
• CGMS (The Coordination Group for Meteorological Satellites)
• CEMS (Community Earth System Model) PCWG (Polar Climate Working Group)
• COMNAP (Council of Managers of National Antarctic Program)
• FARO (Forum of Arctic Research Operators)
• FAMOS (Forum for Arctic Modeling and Observational Synthesis)
• GTN-P (Global Terrestrial Network for Permafrost)
• GODAE (Global Ocean Data Assimilation Experiment) OceanView
• IABP (International Arctic Buoy Programme)
• IAOOS (Ice-Atmosphere-Arctic Ocean Observing System)
• IASC (International Arctic Science Committee)
• IASSA (International Arctic Social Sciences Association)
• IAPSO (International Association for the Physical Sciences of the Oceans) of IUGG
• ICPM (International Commission on Polar Meteorology) of IUGG-IAMAS
• IPA (International Permafrost Association)
• IPAB (International Programme for Antarctic Buoys) 
• ISAC (International Study of Arctic Change) 
• NERC (UK Natural Environment Research Council / UK Arctic Office)
• Norwegian Polar Institute
• Polar Educators International
• SCAR Expert Group on Operational Meteorology in the Antarctic
• SOOS (SCAR Southern Ocean Observing System)
• Secretariat of the Antarctic Treaty
• Voeikov Main Geophysical Observatory

• AMPS (The Antarctic Mesoscale Prediction System)
• Argentina: Servicio Meteorológico Nacional
• Australia: Bureau of Meteorology & CAWCR (Collaboration for Australian Weather and Climate Research)
• Brazil: INMET (Instituto Nacional de Meteorologia)
• Canada: ECCC (Environment and Climate Change Canada)
• Chile: Dirección Meteorológica de Chile
• Finland: Finnish Meteorological Institute
• Iceland: Icelandic Met Office
• New Zealand: MetService (Meteorological Service of New Zealand) & NIWA (National Institute of Water and Atmospheric Research)
• Norway: Meteorologisk institutt
• Russian Federation: Hydrometcenter of Russia
• South Africa: SAWS (South African Weather Service)
• Sweden: SMHI (Swedish Meteorological and Hydrological Institute)
• UK: Met Office & ECMWF (European Centre for Medium-Range Weather Forecasts)
• USA: NWS-NCEP (National Weather Service - National Centres for Environmental Prediction)