Radia%veTransferandSurfaceProper%esWorkingGroup
ReportTuesday,December2nd
ITSC-21November28–December2,2017::Darmstadt,Germany
Co-Chairs:MarcoMatricardi,BenjaminT.Johnson
Name
MarcoMatricardi*
BenjaminJohnson*
StephenEnglish
RoryGray
EmmaTurner
HaixiaLiu
YanqiuZhu
AlexBobryshev
HeatherLawrence
EunheeLee
JohnEyre
PascalBrunel
JeromeVidot
PascaleRoquet
Name
WeiHan
Cris%naLupu
SylvainHeillieOe
RaymondArmonte
MasahiroKazumori
YoichiHirahara
ViviennePayne
YasutakaMurakami
SeonkiPark
VictoriaGalligani
SanjeevKumarSingh
IndiraRamiS.
JamesHocking
Nai-YuWang
VirginieCapelle
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
Summary:ConKnueCRTM/RTTOVmodelintercomparisonsandexpanditslightlytocoverbothclear-skyandcloudyRTcomparisons.Recommenda%onsandAc%onItems• AcKonRTSP-1:BenjaminJohnsontoidenKfyspecificfieldcampaignsinsupportofvalidaKngfastRTmodels(specificallyRTTOVandCRTMatfirst).• AcKonRTSP-2:RaymondArmantetogivefeedbacktotheRTSP-WGco-chairsontheCOMETcampaign.• AcKonRTSP-3:JeromeVidottoprovidefeedbackoncloudscaPeringvalidaKondatasets.• RecommendaKonRTSP-1:TheRTSPworkinggrouprecommendsencouragingresearchintolaboratorymeasurementsofaerosolrefracKveindices.
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
Summary:TheRTSP-WGseekstoimprovetheavailabilityandqualityofspectralresponsefuncKonsneededtogenerateaccuratecoefficientsrequiredbyfastRTmodels.Recommenda%onsandAc%onItems• RecommendaKonRTSP-2:RTCommunitytoexplorealternaKveopKonsforthesupportvibraKonaltemperaturesfornon-LTEcomputaKons.• RecommendaKonRTSP-3:Fastnon-LTEmodelsshouldincludearepresentaKonofOzonevariabilityintheupperatmosphere.• RecommendaKonRTSP-4:ConKnuetosupportpreviousITSC-20recommendaKonofcreaKngaspectralresponsefuncKon(SRF)repository,tobesharedpubliclywiththeRTcommunity.
Summary:TheRTSP-WGseekstoimprovetheavailabilityandqualityofspectralresponsefuncKonsneededtogenerateaccuratecoefficientsrequiredbyfastRTmodels.Recommenda%onsandAc%onItems
• AcKonRTSP-4:BenjaminJohnsontocreateSRFrepositoryandcoordinateinputsfromRTWGandothercontributors.
• RecommendaKonRTSP-5:CGMStoencouragesensormanufacturersandinstrumentengineeringandscienceteamstoprovideSRFswithhigherquality,consistentformat,andwithrapidavailability.
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
Summary:RTSP-WGseekstoimprovethequalityofLBLmodels(includingunderlyingspectroscopicdatabases),andsupportdiversityandconKnueddevelopmentandfundingforLBLmodellingefforts.Recommenda%onsandAc%onItems• RecommendaKonRTSP-6:TheRTSP-WGstronglysupportsconKnuousline-by-linemodeldevelopmentasafundamentalbasisforaccurateradiaKvetransfercalculaKonsinfastRTmodels.TheRTcommunityalsoencouragesandsupportsthedevelopmentofcompeKngline-by-linecodes.• RecommendaKonRTSP-7:LookatthecurrentconKnuumabsorpKonmodelsathigherMWfrequencies(<1000GHz)andinvesKgatetheuseofMTK_CKDmodelinline-by-linemicrowavecodes.• RecommendaKonRTSP-8:CharacterizaKonofLBLmodelbiases,especiallyinwellcharacterizedregionsofthespectrum.APempttomapuncertainKesinspectroscopyintoradianceuncertainKes,starKngfrommajorlinesofagivenregion.
Summary:RTSP-WGseekstoimprovethequalityofLBLmodels(includingunderlyingspectroscopicdatabases),andsupportdiversityandconKnueddevelopmentandfundingforLBLmodellingefforts.Recommenda%onsandAc%onItems• AcKonRTSP-5:MarcoMatricarditocontactRFMgroupregardingapproachestotheaboverecommendaKon• AcKonRTSP-6:ViviennePaynetoestablishandcommunicateapproachesonaboverecommendaKon.• RecommendaKonRTSP-9:Forline-by-linemodeldeveloperstoincludenewformulaKonsoftheDopplerlinebroadeninglineshape(e.g.,includevelocitydependenceinVoigtlineshape)• AcKonRTSP-7:ClaudeCamy-PeyrettoprovidecomprehensivecommunicaKontotheconferenceco-chairsandtotheRTSP-WGregardingaunifiedmodelfordescribingtheshapeoftherelevantatmosphericwatervapourlinesfromtheMWtothevisibleincludingtheveryimportantTIRandSWIRregions.
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
• Summary:Similartooursupportforline-by-linemodelingimprovements,wealsoseektoencouragethedevelopmentofnewandimprovedspectroscopicdatabases,parKcularlywithrespecttothosedatabasesthatsupportLBLmodels.Weaddressaspecificneedforextendingresearchintohighermicrowavefrequenciesthatwillbeusedonfuturesensors.
Recommenda%onsandAc%onItems• RecommendaKonRTSP-10:AstrongemphasisshouldbeputontheconKnuoussupportoftheoreKcalandlaboratoryspectroscopicstudies.ConKnuouseffortsshouldbemaintainedinthegeneraKonandimprovementofbasiclineparameters.• RecommendaKonRTSP-11:TheRTSP-WGrecommendspromoKngresearchintospectroscopyofhigherfrequencymicrowavechannelsupto1000GHz.
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
• Summary:ThefollowingrecommendaKonsareaimedatstrengtheningtheresearchaspectsofsurfacemodelingandassociatedRTsimulaKons,andencouragescommunicaKonandcollaboraKonbetweenandwithinthephysicalmodelingandRTmodelingcommuniKes.
Recommenda%onsandAc%onItems• RecommendaKonRTSP-12:recommendaKontothemodelingcommunitytodevelopaccuratephysicalmodelstosupportemissivitymodelingrequirementsinRTmodels.• RecommendaKonRTSP-13:TheRTSP-WGstronglyrecommendssupportofdevelopingreference-qualityocean-surfaceemissivitymodeling,specificallyInfrared,Microwave,forbothacKveandpassivesimulaKons.• AcKonRTSP-8:RTSP-WGCo-Chairs:sharerecommendaKonwithotherrelevantworkinggroups(e.g.,IPWG,LandSurfacesubgroup,otherrelevantsurfaceresearchcommuniKes).
• Summary:ThefollowingrecommendaKonsareaimedatstrengtheningtheresearchaspectsofsurfacemodelingandassociatedRTsimulaKons,andencouragescommunicaKonandcollaboraKonbetweenandwithinthephysicalmodelingandRTmodelingcommuniKes.
Recommenda%onsandAc%onItems• RecommendaKonRTSP-14:recommendaKontospectrallibrarydeveloperstoincludebroaderandmorediversevegetaKonsampling(e.g.,newtypes),andincludetheeffectsofsenescence.Alsoincludetheimpactofthediurnalcycle.• RecommendaKonRTSP-15:ImprovetheinterfacebetweenlandsurfacemodelparametersandRTmodels,andspecificallyincorporateangulardependenceimpactonpolarizedemissivityandreflecKvityoverallsurfacetypes.
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
Summary:TheopKcalproperKesofscaPeringparKcles(e.g.,aerosols,clouds,precipitaKon)requireconKnuedsupporttoimprovephysicalandradiometricaccuracy.TheaccuracyofscaPeringcomputaKonscanbesignificantlyaffectedbyerrorsanduncertainKesoftheparameterizaKonofopKcalproperKesofthescaPeringparKcles.Recommenda%onsandAc%onItems• RecommendaKonRTSP-16:ForallscaPerers,extendthefrequencyrangetocovertherangesofcurrentandupcomingsensors,fromvisibletomicrowave(i.e.,ICIchannels).ExtendtherangeofparKculatesizestobeconsistentwithobservedparametersforeachparKcletype.• RecommendaKonRTSP-17:explorethenecessityofusingnon-sphericalaerosolparKclescaPeringproperKesinfastRTmodels.• AcKonRTSP-9:BenJohnsontoreportoncurrentdevelopmentsofphysicalandscaPeringproperKesofaerosols,clouds,andprecipitaKontotheRTSPworkinggroup.
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
• Summary:ScaPeringapproximaKonsusedinfastRTmodelsareessenKalforoperaKonalusewithinsimulaKonsinvolvingscaPeringatmospheres.TheRTcommunityshouldcomparesresultsfromscaPeringmodelsolverstobotheachother,andtoexternalmodels.
Recommenda%onsandAc%onItems• RecommendaKonRTSP-18:toRTdevelopers,extendthecomparisonofparameterizedschemes,includingbothcloudsandaerosols.• RecommendaKonRTSP-19:toRTdevelopers,encouragethecomparison/validaKonoffullscaPeringsolvers.ThisshouldincludethecomputaKonalefficiency,specificallyincludingtheadjointmodel.AnalyKcadjointmodelsshouldbeconsidered.• RecommendaKonRTSP-20:toRTdevelopers,foraerosolscaPeringcomputaKons,moreresearchisneededtocharacterizetheregimeswherefastapproximaKonsareeffecKve.
FastRTModelIntercomparisonFastRTModelCoefficientGeneraKonLine-By-LineModelsSpectroscopicParametersSurfaceProperKesOpKcalProperKesforScaPeringModelsScaPeringModelSolversFutureRTOutlookCarryoverfromITSC-20
Summary:FastRTmodelsshouldberesponsivetoupcomingrequirementsarisingfromNWPorothercommuniKes.WespecificallyidenKfyareasimportancethatneedtohavesomeearlyaPenKonanddiscussion.Itisexpectedthattheseitemswillmoveupintootherareasasrequirementsandresearchprogresses.
Recommenda%onsandAc%onItems• RecommendaKonRTSP-21:forRTdeveloperstolookattheimportanceofsimulaKngradiancesinturbulentlayersincoordinaKonwithmodeldevelopers.• RecommendaKonRTSP-22:promotetheextensionofRTmodelstothesimulaKonofacKve/passivedata(e.g.,Radar/LIDAR/ScaPerometers),andtoUV,Visible,andFar-InfraredporKonsofthespectrum.Arobusttreatmentofatmospheric,spectroscopic,andsurfacepolarizaKon(linearandcircular)shouldalsobeconsidered.
