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is to develop a single highly efficient model that can be reconfigured at run time to either run globally at uniform-resolution (with possibly degraded resolution in the "other" hemisphere), or to run with variable resolution over a global domain such that high resolution is focused over an area of interest.
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The next stage of development of the GEM model is to evaluate the non-hydrostatic version for mesoscale applications where the hydrostatic assumption breaks down. The limited-area (open-boundary) version is scheduled to follow. The distributed memory version of GEM is almost completed, it is a major
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for the coming years. These presently include short-range regional forecasting, medium-range global forecasting, and data assimilation. In the future they will include nowcasting at the meso-scales, and dynamic extended-range forecasting on monthly to seasonal timescales. The essence of the approach
191:(GDPS), is currently operational for the global data assimilation cycle and medium-range forecasting, the regional data assimilation spin-up cycle and short-range forecasting. Mesoscale forecasts (distributed under the names
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The strategy is progressing towards a unified data assimilation and forecast system, at the heart of which lies a single multipurpose and multiscale numerical model.
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or HRDPS for the finer mesh, available in Canada only) are produced overnight and are available to the operational forecasters. A growing number of
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applications are now either based on or use the GEM model. Output from the GEM goes out to 10 days, on par with the public output of the
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174:'s ICON (ICOsahedral Nonhydrostatic), which runs out to 7.5 days, it is one of the global medium-range models in general use.
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The operational GEM model is interfaced with a full complement of physical parametrizations, these currently include:
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recoding effort that is based upon a locally developed communication interface currently using
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through vertical diffusion, diffusion coefficients based on stability and
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Fritsch–Chappell type deep convection scheme (regional forecast system),
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Output from
Canadian forecast models such as the GEM is under Canadian
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or RDPS for the coarser mesh, available for all of North
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The operational GEM model dynamics is formulated in terms of the
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158:(IFS), which runs out 10 days, the Naval Research Laboratory
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Introduction to GEMDM, distributed memory version of the GEM
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Atmospheric, oceanographic, cryospheric, and climate models
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Sundqvist condensation scheme for stratiform precipitation,
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Kuo-type deep convection scheme (global forecast system),
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The GEM model has been developed to meet the operational
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in the horizontal (lat-lon) and an unstaggered vertical
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46:. Unsourced material may be challenged and removed.
215:The ensemble variant of the GEM is known as the
527:GEPS mean output, weekly forecasts, out 4 weeks
197:high-resolution deterministic prediction system
345:shallow convection scheme (non precipitating),
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514:GEPS individual ensemble members, out 10 days
482:Ventusky GEM - Weather Forecast Visualisation
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162:(NAVGEM), which runs out eight days, the UK
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187:The GEM's operational model, known as the
106:Learn how and when to remove this message
321:over land with the force-restore method,
193:regional deterministic prediction system
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229:North American Ensemble Forecast System
55:"Global Environmental Multiscale Model"
189:Global Deterministic Prediction System
150:(GFS), which runs out to 16 days, the
435:Environment and Climate Change Canada
376:Interaction Soil-Biosphere-Atmosphere
120:Global Environmental Multiscale Model
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1145:Numerical climate and weather models
852:Regional and mesoscale oceanographic
170:, which runs out to seven days, and
44:adding citations to reliable sources
399:free license if properly attributed
794:Regional and mesoscale atmospheric
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477:visualize and animate GEM outputs
217:Global Ensemble Prediction System
1150:Meteorological Service of Canada
509:REPS individual ensemble members
488:University of Quebec at Montreal
219:(GEPS). It has 20 members (plus
132:Recherche en Prévision Numérique
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618:Atmospheric dispersion modeling
613:Tropical cyclone forecast model
278:Galerkin grid-point formulation
258:hydrostatic primitive equations
160:Navy Global Environmental Model
31:needs additional citations for
268:is an implicit two-time-level
140:Canadian Meteorological Centre
136:Meteorological Research Branch
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521:GEPS mean output, out 16 days
1018:Land surface parametrization
608:Numerical weather prediction
380:Canadian Land Surface Scheme
296:solar and infrared radiation
262:pressure vertical coordinate
533:'s SubX program (top right)
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205:Integrated Forecast System
156:Integrated Forecast System
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643:Meteorological reanalysis
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462:ECCC GEM official website
372:Message Passing Interface
260:with a terrain following
628:Upper-atmospheric models
623:Chemical transport model
475:ECCC MSC AniMet tool to
333:turbulent kinetic energy
329:planetary boundary layer
130:system developed in the
638:Model output statistics
531:George Mason University
338:surface layer based on
142:(CMC). Along with the
901:Atmospheric dispersion
486:Model output from the
397:but is issued under a
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270:semi-Lagrangian scheme
225:global forecast system
172:Deutscher Wetterdienst
148:Global Forecast System
523:from Tropical Tidbits
1119:Scientific modelling
633:Ensemble forecasting
411:Global climate model
40:improve this article
1124:Computer simulation
593:Oceanographic model
319:surface temperature
241:weather forecasting
183:Deterministic model
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987:Chemical transport
342:similarity theory,
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272:. The spatial
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264:(h). The time
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96:February 2019
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51:Find sources:
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29:This article
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1060:Discontinued
933:DISPERSION21
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439:. Retrieved
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358:Gravity wave
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38:Please help
33:verification
30:
739:IFS (ECMWF)
578:Model types
300:water vapor
235:Development
1139:Categories
963:PUFF-PLUME
923:AUSTAL2000
782:GME / ICON
749:GEM / GDPS
698:GFDL CM2.X
417:References
325:turbulence
164:Met Office
66:newspapers
1004:GEOS-Chem
252:Mechanics
243:needs of
178:Operation
973:SAFE AIR
806:RR / RAP
441:June 19,
405:See also
1009:CHIMERE
968:RIMPUFF
948:MERCURE
928:CALPUFF
778:JMA-GSM
693:HadGEM1
676:Climate
327:in the
221:control
134:(RPN),
80:scholar
1083:NOGAPS
999:MOZART
918:ATSTEP
913:AERMOD
892:ADCIRC
882:MITgcm
824:HIRLAM
786:ARPEGE
769:NAVGEM
688:HadCM3
365:Future
312:clouds
280:on an
245:Canada
82:
75:
68:
61:
53:
1030:CLASS
1025:JULES
994:CLaMS
978:SILAM
887:FESOM
877:FVCOM
858:HyCOM
844:HRDPS
820:RAQMS
764:NAEFS
723:ECHAM
718:CFSv2
529:from
504:HRDPS
389:Usage
360:drag.
308:ozone
276:is a
152:ECMWF
87:JSTOR
73:books
1051:CICE
1035:ISBA
958:OSPM
953:NAME
943:MEMO
938:ISC3
908:ADMS
862:ROMS
840:RGEM
835:HWRF
828:LAPS
811:RAMS
759:MPAS
713:CESM
708:CCSM
703:CGCM
683:IGCM
499:RDPS
494:GDPS
443:2021
310:and
118:The
59:news
1088:RUC
1078:NGM
1073:MM5
1069:LFM
1066:Eta
872:MOM
867:POM
831:RPM
816:WRF
801:NAM
754:GFS
744:FIM
166:'s
154:'s
146:'s
144:NWS
124:GEM
42:by
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