GEWEX DATA ANALYSIS PANEL: An Overview and New Vision

RémyRoca(CNRS) and TristanL’Ecuyer(UW-AOS)remy.roca@legos.obs-mip.fr tristan@aos.wisc.edu

GDAP Mission CoreMission•  SponsorproducGonandanalysisofsatellitedatasets(e.g.ISCCP,GPCP,SeaFlux,LandFlux)

•  Overseedatasetassessmentstoprovidecri@caluncertaintyinforma@onfordatarecords•  Assessadequacyofcurrentobservingsystemsandiden@fygaps/futureneeds

•  Supportgroundbasednetworks(e.g.BSRN,GPCC)

•  ActasaninterfacebetweenGEWEXac@vi@esanddatasets•  PROES,GAP,GEWEXpanels•  NewEarth’sEnergyImbalanceini@a@ve

•  RepresentGEWEXatvariousWCRPmee@ngs,WMO,andotherrequests•  OutreachtovariousotherbodieswithinWCRP•  StronglinkstoWMO/CGMSworkinggroups

•  GVAPmeetsduringITGW•  co-chairofICWGisamemberofGDAP•  JointIPWG/Assessment•  RémyRocasitsinWDACjointlyheldwithWGClimate

•  Coordina@onwithGCOS(althoughitneedsimprovement)

The GDAP Ac@vi@es PorAolio PanelmembersRémyRoca,chairTristanL’Ecuyer,vice-chairWouterDorigoAndrewHeidingerSeijiKatoChris@anKummerowHirohikoMasunagaIsabelTrigoClaudiaStubenrauchTianjunZhou

GrounddatanetworkWouterDorigo ISMNA.BeckerandUdoSchneider(DWD) GPCCChuckLong(NOAA) BSRNJimMather(ARM) ARM

«GEWEX»datasetsproducGonPaulStackhouse SurfaceRadia@onBudgetBobAdler GlobalPrecipita@onClimatologyProject(GPCP)StefanKinne GlobalAerosolClimatologyProject(GACP)CarlosJimenez LandFluxCarollAnnClayson SeafluxBillRossowandNOAANCEI ISCCPPBrownandCKummerow GEWEXMergedandIntegratedProduct

«GEWEX»AssessmentsClaudiaStubenrauch(CNRS) CloudsMarcSchröder(DWD) WaterVaporJeffreyReid(NRL) AerosolsHirohikoMasunaga Precipita@on

InvitedmembersGraemeStephens,SSGChairSoniaSeneviratne,SSGChairPetervanOevelen,IGPOWilliamRossow,Founder

GEWEXPROESClaudiaStubenrauch(CNRS)UTCCSueVanDenHeever(CSU)GAP

CORE Ac@vity Message 1:

•  RecentlycompletedGDAPWaterVaporassessmentusedtodra`recommenda@oninthenewDecadalStrategy

•  Updatedcloudassessmentwithimprovedrepresenta@onofac@vesensorobserva@onsisnearingcomple@on

•  Aerosolassessmentisbeingresurrected•  JointIPWG-GEWEXPrecipita@onAssessmentisnowunderway

•  Specificaben@onto«highpriority»regimes(arid,orographic,high-la@tude)•  EstablishedlinkstoGASS,GHP,GAP,etc.andmodelingcommuni@es•  Representa@onfromNASAPMM,NOAA,JAXA,andEuropeancommuni@es•  Seekingagencysupportforcomprehensiveac@vity

•  GDAPpromotesanewcomprehensiveviewonassessment•  Documentongoodprac@cestobefinalizedthisyear

Applica@on-centricapproachesarekeytomaximizevalueofassessments

CORE Ac@vity Message 2:

•  E.g.BSRN•  Cri@calreferenceforSRB•  NewSI-traceablereferencefordownwellingLWirradiancebeingestablished•  Recommendadding2mtemperaturetostandardBSRNobserva@onssuites• Workshoptodefineaccuracystandardsforbuoysites•  BSRNchiefChuckLongissteppingdown•  Replacementsearchunderway–goaltoannouncesuccessorinJuly(short@me)

• Newfeasibilitystudyforaregionallandsurfaceenergybalance/watercycleclosureassessmentcenteredonaDOEARMsite

Ground-basednetworksarevitaltouncertaintycharacteriza@on

Con@nuing a Key Climate Data Record: ISCCP-Next Genera@on •  Cloudproper@escons@tuteacoregeophysicalclimaterecord•  Instrumentsandexper@seexisttogenerateacalibrated,global,10-channel,mul@-parametercloudat3kmwith30minutecoverage

•  Heritagetodealwithsuchdatavolumesalsoexists(e.g.AIRSandMODIS)•  ExcellentopportunityforcoordinatedNASAandNOAAac@vitytomaximizescien@ficbenefitsofnewgeosta@onaryandlow-earthorbi@ngsatellites

•  GDAPendorsestheforma@onofateamtodevelopaunifiedanalysisapproachbuiltaroundthecurrentgeosta@onaryradiancedatarecordaugmentedbyMODIS/VIIRSandsoundercloudinforma@on

•  Agencysupportforaseriesofinterna@onalworkshops•  Target2021forini@alimplementa@on

•  Amul@-ins@tu@onal(mul@-na@onal)processingchainsimilartoISCCPisencouraged•  Individualsatelliteoperators,collect,qualitycontrol,andsub-sampleradiancesandprovidethesedatatoananalysiscenterthatwouldconductarefinedcalibra@onandthequan@ta@vecloudanalysis.

•  Dataproductstobearchivedanddistributedbyexis@ngdatacenters.

Related Ac@vi@es •  GEWEXsponsoredorsupporteddatasetsonacommon1∘,3-hourly,equal-areagrid

•  Supportsregionalwaterandenergybudgetclosureanalyses•  UserworkshopinSpainin2019

•  Advanceland-ETandsurfaceradia@onmeasurementsbyexplicitlylinkingtonew/proposedlandsurfacetemperature,soilmoisture,terrestrialwaterstorage,andgroundheatstorageassessmentac@vi@es

•  GrewoutofCLIVARCONCEPT-HEATandNASANEWS•  Integratedassessmentofmethodsforquan@fyingfundamentaldriverofclimateandreconcilingtop-of-atmospherevs.surfaceperspec@ves

GEWEXIntegratedDataset

Earth’sEnergyImbalance

IntegratedSurfaceWaterandEnergyAssessments

A New GDAP Vision Anintegratedapproachtoenergy-water-massconsistencybasedonrefineduncertaintycharacteriza@on

Sealevel

Gravimetry

Precipita@on

Radia@on

CloudSurfaceFlux

Consistencyasawayoflife

Loeb et al., 2012

Josey et al., 2015

Quan@fyingEarth’sEnergyImbalance…

turbulent

radi

ativ

e

Surface flux

Radiation at TOA

IPCC, 2013

Hindcast and Climate Projection

Storage Inventory (OHC)

Recent Advances from Satellite Gravimetry and Al@metry Measurements

•  Sealevel(fromsatelliteal@metry)minusoceanmass(fromspacegravimetry)providesasatellite-basedalterna@vetoArgofores@ma@ngOHC

•  Thecurrentbestes@mateoftheOHCchangefromsatelliteis0.7±0.5Wm-2

over2005-2015•  GDAPendorsesexpansionofthisac@vitytoregionalandshorter@mescalesaspartofanewEEI-themedenergybudgetassessment.

Overall goal: Strengthen and extend the synergy community on the Earth’s energy imbalance aiming to discuss cross-links between the different WCRP core programs, in particular between CLIVAR and GEWEX, but also including CliC.

Expected outcomes: The workshop will identify research goals and opportunities on the Earth’s energy imbalance, and synthesize and focus the various aspects across WCRP. A main outcome may include the discussion and reporting on how the CONCEPT-HEAT activity could evolve into a WCRP topic.

Joint WCRP/CLIVAR/GEWEX: « Synergy community on the Earth energy imbalance »

Fall 2018, Toulouse, France