68:. In 1997 the IFS became the first operational forecasting system to use 4D-Var. Both ECMWF and Météo-France use the IFS to make operational weather forecasts, but using a different configuration and resolution (the Météo-France configuration is referred to as ARPEGE). It is one of the predominant global medium-range models in general use worldwide; its most prominent rivals in the 6–10 day medium range include the American
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hours out to 15 days and every 06Z/18Z out to 6 days with a horizontal resolution of 18 km and 137 layers in the vertical. The ECMWF also runs a coarser version of the IFS out 45 days; this version is run weekly, with output in five-day intervals. There is also a version that runs out one year. All model versions except HRES are coupled to the
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ECMWF runs the IFS in several configurations. The highest resolution "HRES" configuration is run every 6 hours (00Z and 12Z out to 10 days, 06Z/18Z out to 90 hours) with a horizontal resolution of 9 km using 137 layers in the vertical. The 51-member ensemble system "ENS" is also run every twelve
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Many ECMWF member states use ECMWF global forecasts to provide boundary conditions for their own higher resolution, limited domain forecasts. ECMWF forecasts are free to the national weather services of its member states, but a fee is charged to commercial users, while limited operational data
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is available only to the national weather services of ECMWF member states,. The source code for the atmosphere model is available to other non-commercial users in the form of the OpenIFS which requires a free license. The EC-Earth
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117:(CC-BY ND NC). In contrast to the international organization's forecast, the output of many national weather services is usually freely licensed to all users.
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44:. The version of the IFS run at ECMWF is often referred to as the "ECMWF" or the "European model" in North America, to distinguish it from the American
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150:"AGREEMENT BETWEEN ECMWF & METEO-FRANCE FOR THE ACCESS AND USE OF THE JOINTLY DEVELOPED AND MAINTAINED NWP SOFTWARE IFS/ARPEGE"
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OpenIFS is not open-source despite the name. Its use requires a free OpenIFS license from ECMWF.
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Atmospheric, oceanographic, cryospheric, and climate models
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62:terrain-following vertical coordinate system
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172:Andersson, Erik; Thépaut, Jean-Noël.
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111:Creative Commons license
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423:Model output statistics
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686:Atmospheric dispersion
70:Global Forecast System
46:Global Forecast System
211:"Serving meteorology"
129:is based on the IFS.
904:Scientific modelling
418:Ensemble forecasting
231:"Licenses available"
72:(GFS), the Canadian
909:Computer simulation
378:Oceanographic model
302:ECMWF research page
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772:Chemical transport
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845:Discontinued
718:DISPERSION21
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282:. Retrieved
278:the original
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254:. Retrieved
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156:. Retrieved
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113:prohibiting
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38:Météo-France
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524:IFS (ECMWF)
363:Model types
122:source code
95:ocean model
748:PUFF-PLUME
708:AUSTAL2000
567:GME / ICON
534:GEM / GDPS
483:GFDL CM2.X
312:ARPEGE-IFS
284:2017-10-22
256:2021-12-18
236:2017-10-22
216:2017-10-22
196:2017-10-22
158:2017-10-22
133:References
78:Met Office
789:GEOS-Chem
52:Mechanism
40:based in
924:Category
758:SAFE AIR
591:RR / RAP
88:Variants
42:Toulouse
794:CHIMERE
753:RIMPUFF
733:MERCURE
713:CALPUFF
563:JMA-GSM
478:HadGEM1
461:Climate
60:with a
868:NOGAPS
784:MOZART
703:ATSTEP
698:AERMOD
677:ADCIRC
667:MITgcm
609:HIRLAM
571:ARPEGE
554:NAVGEM
473:HadCM3
36:, and
815:CLASS
810:JULES
779:CLaMS
763:SILAM
672:FESOM
662:FVCOM
643:HyCOM
629:HRDPS
605:RAQMS
549:NAEFS
508:ECHAM
503:CFSv2
177:(PDF)
153:(PDF)
104:Usage
836:CICE
820:ISBA
743:OSPM
738:NAME
728:MEMO
723:ISC3
693:ADMS
647:ROMS
625:RGEM
620:HWRF
613:LAPS
596:RAMS
544:MPAS
498:CESM
493:CCSM
488:CGCM
468:IGCM
98:NEMO
16:The
873:RUC
863:NGM
858:MM5
854:LFM
851:Eta
657:MOM
652:POM
616:RPM
601:WRF
586:NAM
539:GFS
529:FIM
80:'s
22:IFS
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.