PolarSatelliteCompositeAtmosphericMo3onVectors

Ma#hewA.Lazzara1,RichardDworak2,DavidA.Santek2,NickA.Bearson2,JeffreyR.Key3,andChrisS.Velden2

1AntarcFcMeteorologicalResearchCenter2CooperaFveInsFtuteMeteorologicalSatelliteStudies

SpaceScienceandEngineeringCenterUniversityofWisconsin‐Madison

3NOAA/NESDIS/STAR

Outline:PolarSatelliteCompositeAtmosphericMo3onVectors(AMV)

•  PhaseI:TesFng•  PhaseII:Refining•  Future

– AMVsandComposites

•  Thanks:– RickKohrs,JerryRobaidek,SteveWanzong,Sco#Lindstrom,UtkanKolat,&JamieDaniels

– NaFonalScienceFoundaFon/OfficeofPolarPrograms

– NOAAGOES‐RRiskReducFonProgram

OriginalPolarSatelliteCompositesAntarc3c Arc3c

Combined via selecting the coldest pixel *Reduces limb darkening *Smooth transition between satellites *Intended for visualization

Geostationary: *GOES, Meteosat, FY-2, MTSAT

Polar-orbiting: *NOAA, MODIS, Metop

Geosta3onaryandPolar‐orbi3ng

AtmosphericMo3onVectors

Missingwinds–gapincoverage•  NWPcenters:thepolarjetstream

canbelocatedinthisgap;impropermodeliniFalizaFoncanleadtoerrorsintheforecasts.

•  CIMSSresearch:theaddiFonofthewindinformaFonisimportantinthisregion.

PhaseI:TestCompositeAMV

ModerateRMSerrors…(AntarcFconly…..)

AllVectorRMSE: 7.91AllVectorDifference: 6.34SpeedBias: 0.15

60‐70oVectorRMSE: 7.95

60‐70oVectorDifference:6.40

SpeedBias: 0.08

Needanewcompositemethodtoreduceerror…

Proof of concept study – Fill the Gap!

Whyisitimportanttohaveaccurate3mestamps?Example: MODIS Mixed (Terra and Aqua) winds with varying time stamps (Dworak, 2009)

CASE #1 (Aqua-Terra-Terra) CASE #2 (Aqua-Terra-Aqua)

•  GenerateCompositeAtmosphericMoFonVectorsinthe“gap”:– CorrecFngforparallaxinviewingthecloudtracersfromdifferentsatellitesandinstruments

– DevelopingthelogicforapplyingacommonFme‐stamptoregionswithinthecompositethatcorrespondtotheviewingbyspecifiedsatellites

PhaseII:ProjectGoal

Metadata•  Brightnessvalues•  Timedifferencefromnominalimage3me

•  Distancefromsatellitesubpoint•  Pixelarea•  Satellitesensor•  Wavelength

•  Parallaxdistance•  Parallaxdirec3on

ExampleMixofSatellites

NorthernHemisphere…

SouthernHemisphere…

Mul3pleSatelliteUsage?

14April09:45ZArcFcComposite53oN/32oW

14April10:30ZArcFcComposite53oN/32oW

14April11:15ZArcFcComposite53oN/32oW

UsingAircraPofValida3on…

• ValidaFonandtrialtesFngofthecomposiFngandAMVgeneraFonprocessinreal‐FmeusingNESDISmethodswithradiosondesandexploringverificaFonwithaircramobservaFons

• Hasleretal.,1977

NorthernHemisphereValida3onSta3s3csPhaseI•  # Observations: 31,373

•  All Vector RMSE: 7.78 •  All Vector Difference: 6.16 •  Speed Bias: -0.62

•  # Observations: 7250 •  60-70o Vector RMSE: 8.91

•  60-70o Vector Difference: 6.59

•  Speed Bias: -0.33

PhaseII•  # Observations: 6,246 •  All Vector RMSE: 7.20 •  All Vector Difference: 5.65 •  Speed Bias: -0.98

•  # Observations: 1253 •  60-70o Vector RMSE: 7.43

•  60-70o Vector Difference: 6.15 •  Speed Bias: -1.92

SouthernHemisphereValida3onSta3s3csPhaseI•  # Observations: 518

•  All Vector RMSE: 8.32 •  All Vector Difference: 6.97 •  Speed Bias: -0.39

•  # Observations: 353 •  60-70o Vector RMSE: 7.83

•  60-70o Vector Difference: 6.57

•  Speed Bias: -0.40

PhaseII•  # Observations: 39 •  All Vector RMSE: 6.91 •  All Vector Difference: 6.12 •  Speed Bias: 0.57

•  # Observations: NA •  60-70o Vector RMSE: NA

•  60-70o Vector Difference: NA •  Speed Bias: NA

Update! Northern Hemisphere: POES #Obs =   357 Vrmse = 6.14 GOES #Obs = 84570 Vrmse = 6.10 MIX  #Obs = 11690 Vrmse = 6.83

Southern Hemisphere: GOES #Obs =  1248 Vrmse = 8.05 MIX  #Obs =    68 Vrmse = 7.85

Ac3vi3esinProgress…

•  ConFnuetherouFneproducFonofthecompositesandthewindsproductatCIMSS

•  CreatedatasetsforuseinmodelforecastexperimentsincollaboraFonwithNWPcenters

•  EvaluatetheforecastimpactofthisblendedwindproductascomparedtotheimpactfromtheindividualgeostaFonaryandpolarwindproducts

ImpactofLEO/GEOAMVsNOGAPSFNMOC/NRL

  24-hr error reduction in the FNMOC model for various observation types.

  The reduction in error resulting from the incorporation of the LEO-GEO wind product is circled.

  This wind product will be incorporated into FNMOCʼs operational system after further testing.

What’sNext?•  FormalrequestforArcFcCompositestobecomeoperaFonalwithNOAA/NESDIS•  OceanPredicFonCenter

•  HydrometeorologicalPredicFonCenter

•  NaFonalWeatherService(NWS)Alaska

•  NaFonalIceCenter

•  CompositewindsbecomeoperaFonal…–  InterestinwindsfromNWSAlaskaforGOES‐RProvingGround

–  NumericalWeatherPredicFon:

•  NancyBaker&RandyPauley–NRL(NOGAPS)–  JCSDAPartner

•  JordanPowers–NCAR(PolarWRF‐AMPS)

•  Timestampeffort:–  WillhelpoutanotherNESDISproduct–themixedTerraandAqua

AMV–beingtestedoperaFonally

Thankyou!…Ques3ons?

Acknowledgments: Phase I – Thanks to NSF Office of Polar Programs - Grant # ANT-0537827, ANT-0838834, ARC-0713843 Phase II – Thanks to NOAA GOES-R Risk Reduction Program - Grant # NA06NES4400002