Overview of the CESM2/ CESM2.1 Simpler Model€¦ · Medeiros 2, Kevin Reed3, Andrew GePelman ,...

OverviewoftheCESM2/CESM2.1SimplerModelFramework

AMWGWorkshop,BoulderFebruary/20/2019

FigurebyB.Medeiros(EOS2017)

Chris;aneJablonowski1,IslaSimpson2,PeterLauritzen2,BrianMedeiros2,KevinReed3,AndrewGePelman2,PatrickCallaghan2,JulioBacmeister2,JohnTruesdale2,CherylCraig2,SteveGoldhaber2

1UniversityofMichigan,2NCAR,3StonyBrookUniversity

IncollaboraIonwiththeSimplerModelIniIaIvebyLorenzoPolvani(ColumbiaU.),AmyClement&JamesBenedict(U.Miami)

A comprehensive simulation-to-science infrastructure that tackles the needs of next-generation, high-resolution, data intensive

climate modeling activities.

CESMSimplerModelWebpage(indevelopment)hPp://www.cesm.ucar.edu/models/simpler-models/

NewlyavailablewithCESM2.0andCESM2.1

ModelDevelopmentCommunity•  Primarilyinterestedininter-

comparisonsandthedesignaspectsofweatherandclimatemodels

•  DynamicalCoreModelIntercomparisonProject(DCMIP)

•  Aqua-PlanetExperiment(APE)•  Held-Suareztest(originalintent)



Tradi;onally,therehavebeentwodifferentcommuni;es

Background:SimplerModelStakeholders

UserCommunity•  Primarilyinterestedinthe

generalcircula;on(climate)oftheatmosphere

•  Individualscien;stswhoinves;gatetheclimateofonemodelwithsimplifiedforcings(dry&moist)

Examples:

bothapproachesalsoserveasteachingtools



•  Overthelast15yearstherehasbeenincreasedrecogni;on(includingaModelHierarchiesWorkshopatGFDLin2016)thatamodelhierarchypromotesourunderstandingofmodeldesignsandthegeneralcircula;onoftheatmosphere

•  Examplepublica;onsinclude:

SimplerModels&ModelHierarchies

§  Held,I.(2005),Thegapbetweensimula;onandunderstandinginclimatemodeling,Bull.Am.Meteorol.Soc.,86,1609–1614,hPps://doi.org/10.1175/BAMS-86-11-1609.

§  Held,I.M.(2014),Simplicityamidcomplexity,Science,343(6176),1206–1207.

§  Polvani,L.M.,A.C.Clement,B.Medeiros,J.J.Benedict,andI.R.Simpson(2017),Whenlessismore:Openingthedoortosimplerclimatemodels,Eos,98,hPps://doi.org/10.1029/2017EO079417.

§  Jeevanjee,N.,P.Hassanzadeh,S.Hill,andA.Sheshadri(2017),Aperspec;veonclimatemodelhierarchies,J.Adv.Model.EarthSyst.,9,1760–1771,hPps://doi.org/10.1002/2017MS001038



ModelHierarchiesIsolatedDynamics:Determinis;cdrydynamicalcoretests

IsolatedPhysics:SingleColumnModeling

Determinis;cmoistdynamicalcoretests

Drydynamicalcore(climate)

Modelswithsimplifiedphysics(climate)

Radia;veConvec;veEquilibrium(RCE)Models

Full-physicsAquaPlanetModels

Atmospheremodelswithprescribedocean/icedata(AMIP,CAPT)

CoupledEarthSystemModels



In-DepthLookatModelHierarchiesIsolatedDynamics:Determinis;cdrydynamicalcoretests

IsolatedPhysics:SingleColumnModeling(NCARcontact:AndrewGePelmanandJohnTruesdale)

CESMconfigura;on: --compsetFSCAM










ACloserLookatthePyramid:Determinis;cDryDynamicalCoreHierarchy

Drydycore

Nonrota;ngplanet Rota;ngplanet

Topography Notopography Topography Notopography

Advec;ontests

Gravitywaves

Mountainwavetests

DCMIP-2012testswithop;onalreduced-sizeEarth

Fixeddissipa;on

Scaleddissipa;on

P04baroclinicwave(EUL)

JW06baroclinicwave

UMJS14baroclinicwave

opIonaltoychemistry

others

opIonaldeep-atmosphere

CESMconfigura;on:Adiaba;c:--compsetFADIABP04:--compsetFDABIP04

Analy;cini;alcondi;onsareimplementedforJW06andUMJS14

Snapshots of the dry UMJS14 baroclinic wave

Surfacepressureatday10(Δx=110km):overallpaXernssimilar,detailsdiffer

•  Some Gibb’s ringing in E3SM (ACME)

•  Some grid imprinting (wave 4 and wave 5 signals) in CSU_LZ, DYNAMICO, FV3, ICON, NICAM, apparent in the Southern Hemispheres

Ullrich,P.A.,T.Melvin,C.JablonowskiandA.Staniforth(2014),Aproposedbaroclinicwavetestcasefordeep-andshallow-atmospheredynamicalcores.Quart.J.RoyalMeteor.Soc.,Vol.140,1590-1602,doi:10.1002/qj.2241

ExamplesfromDCMIP-2016

DesignConsidera;ons:SimplifiedMoistPhysics

Surfacefluxesofsensible&latentheat,andmomentum

Large-scalecondensa;onorKessler-typewarmrain

PBLMixingofpot.T,q,u,v

Simple-Physics(ReedandJablonowski,2012;Klempetal.,2015)



ACloserLookatthePyramid:SimplifiedMoistDynamicalCores(determinis;c)

Moistdycore

Precipita;ononly:Kesslerphysics

Precipita;on(large-scalecondensa;on),PBLmixingandsurfacefluxes

Idealizedtropicalcyclone

MoistUMJS14baroclinicwave(DCMIP-2016configura;onwithanaly;cini;aldata)

CESMconfigura;on:--compsetFKESSLER

MoistJW06baroclinicwave(DCMIP-2012configura;on,

analy;cIC)

CESMconfigura;on:--compsetFTJ16butwithmodifica;ons

•  Kesslerphysics,supercellIC:Klemp,J.B.,W.C.Skamarock,andS.-H.Park(2015),Idealizedglobalnonhydrosta;catmospherictestcasesonareduced-radiussphere,J.Adv.Model.EarthSyst.,7,1155–1177

•  Large-scaleprecipitaIon,PBL,surfacefluxes:Reed,K.A.andC.Jablonowski(2012),Idealizedtropicalcyclonesimula;onsofintermediatecomplexity:AtestcaseforAGCMs,J.Adv.Model.EarthSyst.,4,M04001

•  TropicalcyclonetestcaseIC:Reed,K.A.andC.Jablonowski(2011),AnAnaly;cVortexIni;aliza;onTechniqueforIdealizedTropicalCycloneStudiesinAGCMs.Mon.Wea.Rev.,139,689–710

•  JW06baroclinicwave,seealsoDCMIP-2012formoistvariant:Jablonowski,C.andWilliamson,D.L.(2006),Abaroclinicinstabilitytestcaseforatmosphericmodeldynamicalcores.Q.J.R.Meteorol.Soc.,132,2943-2975

Supercell(onasmallplanet)

Today:UseICdatafiles

•  At day 10 precipitation bands become very narrow, tend to break up in some models (with very strong grid-point scale precipitation)

•  Differing levels of ‘noise’ and diffusion

PrecipitaIonratesatday10(Δx=110km):overallpaXernssimilar,detailsdiffer

Moist UMJS14 baroclinic wave with Kessler physics

ExamplesfromDCMIP-2016



ACloserLookatthePyramid:DryDynamicalCore(Climate)Hierarchy

Drydycore

BasedonHeld-Suarez(1994)forcing BoerandDenis(1997)forcing

withstratosphericmodifica;ons

Williamsonetal.(1998)

OriginalHeldand

Suarez(1994)test

Held-Suareztestwith

topography

CESMconfigura;on:--compsetFHS94

PolvaniandKushner(2002)

Jucker(2016)

GerberandPolvani(2009),

Gerber(2012)

opIonaltopographyopIonalAge-of-Airtracers

Available,butrequirescodechangesdescribedhere:hPp://www.cesm.ucar.edu/models/simpler-models/changetrefana.html

Examples of Held-Suarez simulations with high top

Yao,W.andC.Jablonowski(2015),IdealizedQuasi-BiennialOscilla;onsinanEnsembleofDryGCMDynamicalCores.J.Atmos.Sci.,72,2201–2226,hPps://doi.org/10.1175/JAS-D-14-0236.1

0.1hPa

1000hPa

CAM-SLD CAM-FV

CAM-EUL CAM-SE

Intercomparisonsofthemonthly-meanzonal-meanzonalwindoffourCAMdynamicalcoreswith200kmgridspacing,55levelsandamodeltopat0.1hPa

ExposesQBO-likeoscilla;onsinthestratosphere

Zonal-meanmonthly-meanzonalwind

Years

Examples of Held-Suarez simulations with stratospheric modifications by Williamson et al. (1998)

ExposesSuddenStratosphericWarming(SSW)signalsinCAM-SLD

•  Yao,W.andC.Jablonowski(2016),TheImpactofGCMDynamicalCoresonIdealizedSuddenStratosphericWarmingsandTheirQBOInterac;ons.J.Atmos.Sci.,73,3397–3421,hPps://doi.org/10.1175/JAS-D-15-0242.1

•  Williamson,D.L.,J.G.Olson,andB.A.Boville(1998),AComparisonofSemi-LagrangianandEulerianTropicalClimateSimula;ons.Mon.Wea.Rev.,126,1001–1012,hPps://doi.org/10.1175/1520-0493(1998)126<1001:ACOSLA>2.0.CO;2

TimeseriesofthepotenIalvorIcityontheonthe840Kisentropeshowsbreakupofthepolarvortex(SSW)attheNorthPole



ACloserLookatthePyramid:SimplifiedMoistModels(Climate)Hierarchy

Moistdycorewithlarge-scaleprecipita;on,PBLmixing,andsurfacefluxes

PrescribedSSTMixed-layer(slab)oceanmodel

Grayradia;on

Friersonetal.(2006)

ThatcherandJablonowski(2016):moistversionoftheHeld-Suarez

test

CESMconfigura;on:--compsetFTJ16

O’GormanandSchneider(2008)

Merlisetal.(2013)

withprescribedoceanheatfluxesandSBMconvecIon

Complexradia;on

modifiedFriersonetal.(2006)withSBMconvec;on

simplifiedBeXs-Miller(SBM)convecIonscheme(Frierson2007)canbeadded

Juckerand

Gerber(2017)

modifiedMerlisetal.(2013)

ComparisonofTJ16(‘moistHeld-Suarez’)andAqua-Planet

MoistHeld-Suarez(TJ16) Aqua-PlanetwithcomplexCAM5physicsCAM5-SE1°L30:MoistHeld-SuarezmimicsAqua-Planetsimula;ons

Temperature

Zonalwind

Thatcher,D.R.andC.Jablonowski(2016),AmoistaquaplanetvariantoftheHeld–Suareztestforatmosphericmodeldynamicalcores,Geosci.ModelDev.,9,1263-1292,hPps://doi.org/10.5194/gmd-9-1263-2016

2-year-meanzonal-mean

MoistHeld-Suarez(TJ16) Aqua-PlanetwithcomplexCAM5physics

LessefficientupwardmoisturetransportinPBL,butdistribu;onsaresimilar

Specifichumidity

Rela;veHumidity

Lackofdeepconvec;onleadstodryerareasnearthetropopause

ComparisonofTJ16(‘moistHeld-Suarez’)andAqua-PlanetCAM5-SE1°L30:MoistHeld-SuarezmimicsAqua-Planetsimula;ons

Examples of RCE simulations with CAM5-SE

Reed,K.A.,B.Medeiros,J.T.Bacmeister,andP.H.Lauritzen,2015:GlobalRadia;ve–Convec;veEquilibriumintheCommunityAtmosphereModel,Version5.J.Atmos.Sci.,72,2183–2197,hPps://doi.org/10.1175/JAS-D-14-0268.1

RCEHierarchy

RCEsetup

PrescribedSTT

Slabocean(SOM)

RCEsetupincludes:norota;on,fixedinsula;on,full-physicspackage,water-coveredEarth(aqua-planet)



ACloserLookatthePyramid:Aqua-PlanetHierarchy(Climate)

Aqua-planetconfigura;on(fullphysics)

PrescribedSSTs Slabocean

NealeandHoskins(2000)

QOBSSST Otherprescribedaqua-planetSSTs

CAM5physics

CAM6physics

CAM4physics

CAM5physics

CAM6physics

CAM4physics

CESMconfigura;ons:--compsetQSC4--compsetQSC5--compsetQSC6

CESMconfigura;ons:--compsetQPC4--compsetQPC5--compsetQPC6

compsetsavailable

CESM2/CESM2.1SimplerModelStatus•  Thecurrentlyavailableidealized(simpler)model

configura;onscanberunout-of-the-boxviathecreate_newcase(compset)andxmlchangecommands

•  SeveralanalyIciniIalcondiIonsareavailablevianamelistsetngsfore.g.dryandmoistdynamicalcoretests–  analy;c_ic_type=‘dry_baroclinic_wave_dcmip2016’–  analy;c_ic_type=’moist_baroclinic_wave_dcmip2016’–  analy;c_ic_type=‘dry_baroclinic_wave_jw2006’–  analy;c_ic_type=‘held_suarez_1994’

•  Alterna;vely:Ini;alcondi;onscanalsobereadfromaniniIaldatafile(relevantformanyotheradiaba;ctests)

•  Severalsetupsarecurrentlyinprogress:simplified-physicsgray-radia;on,RCE

Conclusions•  EffortsareunderwaytobuildupaCAMSimplerModelFrameworkthat

supportsthebroadercommunity•  SupportsthestandardizaIonofthemodelconfigura;ons•  Frameworksupports(1)modelintercomparisonswithCAMdycoresand

variousCAMphysicspackages,(2)invesIgaIonofthegeneralcirculaIon,and(3)educaIon(SimplerModelsareateachingtool)

•  Theideaisthattheavailableidealized(simpler)modelconfigura;onscanberuneitherout-of-the-boxorwithafewaddedsetngs(e.g.viathenamelistorxmlchange)

•  TheSimplerModelwebpagedocumenta;onwillsoonbeupdatedtoreflectthecurrentstatus

•  AsdemonstratedtheSimplerModelFrameworkonlycapturesfragmentsofthepossiblemodelhierarchies(indicatedbythecompsetsnamesinthepresentaIon)

•  Upfordiscussions:WhichaddiIonstotheframeworkaredesiredbythecommunity?Whichonesareuseful?

Boer,G.&Denis,B.ClimateDynamics(1997)13:359-374,hPps://doi.org/10.1007/s003820050171Frierson,D.M.,I.M.Held,andP.Zurita-Gotor(2006),AGray-Radia;onAquaplanetMoistGCM.PartI:Sta;cStabilityandEddyScale.J.Atmos.Sci.,63,2548–2566,hPps://doi.org/10.1175/JAS3753.1Frierson,D.M.(2007),TheDynamicsofIdealizedConvec;onSchemesandTheirEffectontheZonallyAveragedTropicalCircula;on.J.Atmos.Sci.,64,1959–1976,hPps://doi.org/10.1175/JAS3935.1Gerber,E.P.andL.M.Polvani(2009):Stratosphere–TroposphereCouplinginaRela;velySimpleAGCM:TheImportanceofStratosphericVariability.J.Climate,22,1920–1933,hPps://doi.org/10.1175/2008JCLI2548.1Gerber,E.P.(2012),StratosphericversusTroposphericControloftheStrengthandStructureoftheBrewer–DobsonCircula;on.J.Atmos.Sci.,69,2857–2877,hPps://doi.org/10.1175/JAS-D-11-0341.1Held,I.M.andM.J.Suarez(1994),AProposalfortheIntercomparisonoftheDynamicalCoresofAtmosphericGeneralCircula;onModels.Bull.Amer.Meteor.Soc.,75,1825–1830,hPps://doi.org/10.1175/1520-0477(1994)075<1825:APFTIO>2.0.CO;2Held,I.(2005),Thegapbetweensimula;onandunderstandinginclimatemodeling,Bull.Am.Meteorol.Soc.,86,1609–1614,hPps://doi.org/10.1175/BAMS-86-11-1609

AllReferences(1)

Held,I.M.(2014),Simplicityamidcomplexity,Science,343(6176),1206–1207,hPps://doi.org/10.1126/science.1248447Jablonowski,C.andWilliamson,D.L.(2006),Abaroclinicinstabilitytestcaseforatmosphericmodeldynamicalcores.Q.J.R.Meteorol.Soc.,132,2943-2975,hPps://doi.org/10.1256/qj.06.12Jeevanjee,N.,P.Hassanzadeh,S.Hill,andA.Sheshadri(2017),Aperspec;veonclimatemodelhierarchies,J.Adv.Model.EarthSyst.,9,1760–1771,hPps://doi.org/10.1002/2017MS001038Jucker,M.(2016),AreSuddenStratosphericWarmingsGeneric?InsightsfromanIdealizedGCM.J.Atmos.Sci.,73,5061–5080,hPps://doi.org/10.1175/JAS-D-15-0353.1Jucker,M.andE.P.Gerber(2017),UntanglingtheAnnualCycleoftheTropicalTropopauseLayerwithanIdealizedMoistModel.J.Climate,30,7339–7358,hPps://doi.org/10.1175/JCLI-D-17-0127.1Klemp,J.B.,W.C.Skamarock,andS.-H.Park(2015),Idealizedglobalnonhydrosta;catmospherictestcasesonareduced-radiussphere,J.Adv.Model.EarthSyst.,7,1155–1177,hPps://doi.org/10.1002/2015MS000435Lauritzen,P.H.,A.J.Conley,J.-F.Lamarque,F.ViP,andM.A.Taylor(2015),Theterminator"toy"-chemistrytest:Asimpletooltoassesserrorsintransportschemes,Geosci.ModelDev.,8,1299-1313,hPps://doi.org/10.5194/gmd-8-1299-2015

AllReferences(2)

Merlis,T.M.,T.Schneider,S.Bordoni,andI.Eisenman(2013),HadleyCircula;onResponsetoOrbitalPrecession.PartI:Aquaplanets.J.Climate,26,740–753,hPps://doi.org/10.1175/JCLI-D-11-00716.1Neale,R.B.andHoskins,B.J.(2000),AstandardtestforAGCMsincludingtheirphysicalparametriza;ons:I:theproposal.Atmosph.Sci.LeP.,1:101-107,hPps://doi.org/10.1006/asle.2000.0022O’Gorman,P.A.andT.Schneider(2008),TheHydrologicalCycleoveraWideRangeofClimatesSimulatedwithanIdealizedGCM.J.Climate,21,3815–3832,hPps://doi.org/10.1175/2007JCLI2065.1Polvani,L.M.,R.K.ScoP,andS.J.Thomas(2004),NumericallyConvergedSolu;onsoftheGlobalPrimi;veEqua;onsforTes;ngtheDynamicalCoreofAtmosphericGCMs,Mon.Wea.Rev.,132,2539–2552,hPps://doi.org/10.1175/MWR2788.1Polvani,L.M.,andP.J.Kushner(2002),Troposphericresponsetostratosphericperturba;onsinarela;velysimplegeneralcircula;onmodel.Geophys.Res.LeP.,29(7),hPps://doi.org/10.1029/2001GL014284Polvani,L.M.,A.C.Clement,B.Medeiros,J.J.Benedict,andI.R.Simpson(2017),Whenlessismore:Openingthedoortosimplerclimatemodels,Eos,98,hPps://doi.org/10.1029/2017EO079417Reed,K.A.andC.Jablonowski(2011),AnAnaly;cVortexIni;aliza;onTechniqueforIdealizedTropicalCycloneStudiesinAGCMs.Mon.Wea.Rev.,139,689–710,hPps://doi.org/10.1175/2010MWR3488.1

AllReferences(3)

Reed,K.A.andC.Jablonowski(2012),Idealizedtropicalcyclonesimula;onsofintermediatecomplexity:AtestcaseforAGCMs,J.Adv.Model.EarthSyst.,4,M04001,hPps://doi.org/10.1029/2011MS000099Reed,K.A.,B.Medeiros,J.T.Bacmeister,andP.H.Lauritzen,2015:GlobalRadia;ve–Convec;veEquilibriumintheCommunityAtmosphereModel,Version5.J.Atmos.Sci.,72,2183–2197,hPps://doi.org/10.1175/JAS-D-14-0268.1Thatcher,D.R.andC.Jablonowski(2016),AmoistaquaplanetvariantoftheHeld–Suareztestforatmosphericmodeldynamicalcores,Geosci.ModelDev.,9,1263-1292,hPps://doi.org/10.5194/gmd-9-1263-2016Ullrich,P.A.,T.Melvin,C.JablonowskiandA.Staniforth(2014),Aproposedbaroclinicwavetestcasefordeep-andshallow-atmospheredynamicalcores.Quart.J.RoyalMeteor.Soc.,140,1590-1602,hPps://doi.org/10.1002/qj.2241Ullrich,P.A.,Jablonowski,C.,Kent,J.,Lauritzen,P.H.,Nair,R.,Reed,K.A.,Zarzycki,C.M.,Hall,D.M.,Dazlich,D.,Heikes,R.,Konor,C.,Randall,D.,Dubos,T.,Meurdesoif,Y.,Chen,X.,Harris,L.,Kühnlein,C.,Lee,V.,Qaddouri,A.,Girard,C.,GiorgePa,M.,Reinert,D.,Klemp,J.,Park,S.-H.,Skamarock,W.,Miura,H.,Ohno,T.,Yoshida,R.,Walko,R.,Reinecke,A.,andViner,K.(2017),DCMIP2016:areviewofnon-hydrosta;cdynamicalcoredesignandintercomparisonofpar;cipa;ngmodels,Geosci.ModelDev.,10,4477-4509,hPps://doi.org/10.5194/gmd-10-4477-2017

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Yao,W.andC.Jablonowski(2015),IdealizedQuasi-BiennialOscilla;onsinanEnsembleofDryGCMDynamicalCores.J.Atmos.Sci.,72,2201–2226,hPps://doi.org/10.1175/JAS-D-14-0236.1Yao,W.andC.Jablonowski(2016),TheImpactofGCMDynamicalCoresonIdealizedSuddenStratosphericWarmingsandTheirQBOInterac;ons.J.Atmos.Sci.,73,3397–3421,hPps://doi.org/10.1175/JAS-D-15-0242.1Williamson,D.L.,J.G.Olson,andB.A.Boville(1998),AComparisonofSemi-LagrangianandEulerianTropicalClimateSimula;ons.Mon.Wea.Rev.,126,1001–1012,hPps://doi.org/10.1175/1520-0493(1998)126<1001:ACOSLA>2.0.CO;2Zarzycki,C.M.,C.Jablonowski,J.Kent,P.H.Lauritzen,R.Nair,K.A.Reed,P.A.Ullrich,D.M.Hall,M.A.Taylor,D.Dazlich,R.Heikes,C.Konor,D.Randall,X.Chen,L.Harris,M.GiorgePa,D.Reinert,C.Kühnlein,R.Walko,V.Lee,A.Qaddouri,M.Tanguay,H.Miura,T.Ohno,R.Yoshida,S.-H.Park,J.Klemp,andW.Skamarock(2019),DCMIP2016:TheSplitngSupercellTestCase,Geosci.ModelDev.,inpressDCMIP-2016projectpageanddocumenta;onoftheDCMIP-2016testcases:DCMIP-2012testcases(includingthemoistJW06baroclinicwave&otherdycoretests):hPps://www.earthsystemcog.org/projects/dcmip-2016/testcases

hPps://www.earthsystemcog.org/projects/dcmip-2012/test_cases

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Overview of the CESM2/ CESM2.1 Simpler Model€¦ · Medeiros 2, Kevin Reed3, Andrew GePelman ,...

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