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SACR-ADV-VAD Doppler Lidar (DL) SACR-ADV-VAD Doppler Lidar (DL) Doppler Lidar (DL) SACR-ADV-VAD SACR-ADV-VAD Doppler Lidar (DL) Data Product Time Resolu;on Height Resolu;on Maximum Height Condi;ons Current Product Availability SACR-ADV-VAD ~ 0.5 hour 50 m 15 km Cloud/ precipita;on scaLerers Limited and in evalua;on: ENA: 201612 – 201702 OLI: 201612 – 201702 SGP: 201208 PVC: 201209 TMP: 201408 Sonde 6 – 12 hour, site dependent ~ 5 – 12 m ~ 25 km Nearly all Rou;ne at central facility Interpolated Sonde (IS) 1 min 20 m; coarser above ~ 3.5 km ~ 25 km Nearly all Rou;ne at central facili;es, or soon-to-be Radar Wind Profiler (RWP) 10 min 62.5 m ~ 1.6 – 2.2 km Nearly all Limited and in evalua;on: ENA: 201505 – 201509, 201605 – 201609 SGP + Boundary Facili;es: 201505 – 201509, 201605 – 201609 Doppler Lidar (DL) 0.25 – 1 hour 26 m ~ 1.5 – 2.0 km Nearly all Rou;ne at central facility & boundary facili;es Tami Toto 1 , Karen Johnson 1 , Ka;a Lamer 2 , ScoL Giangrande 1 , Pavlos Kollias 3 1 Brookhaven Na-onal Laboratory, 2 Pennsylvania State University, 3 Stony Brook University Evalua;on of SACR ADVance Velocity-Azimuth Display (SACR-ADV-VAD) Value-Added Product KASACR Here, the VAD technique is applied to the Ka-Band millimeter wavelength Scanning ARM Cloud Radar (KASACR) in the SACR ADVance Velocity-Azimuth Display (SACR-ADV-VAD) Value-Added Product (VAP). The VAP complements infrequent soundings by providing profiles of horizontal wind speed and direcKon in-cloud every Kme the SACR operates the Hemispherical Sky Range-Height Indicator (HSRHI) scan strategy. Kollias, P., N. Bharadwaj, K. Widener, I. Jo, and K. Johnson, 2014: Scanning ARM Cloud Radars. Part I: OperaKonal Sampling Strategies. J. Atmos. Oceanic Technol., 31, 569– 582, doi: 10.1175/JTECH-D-13-00044.1. 1. Evalua;on Example #1: Southern Great Plains (SGP) August 4, 2012 2. Evalua;on Example #2: Eastern North Atlan;c (ENA) January 16, 2017 The Velocity Azimuth Display (VAD) technique has historically been used to retrieve verKcal profiles of the wind using weather radars (Lhermibe and Atlas, 1961). Scanning radar mean Doppler velocity observaKons at a constant range are combined to esKmate wind speed and direcKon at a parKcular height above the radar locaKon. Abstract Wind Speed Wind Direc;on Wind Speed Wind Direc;on Interpolated Sonde (IS) VAP SACR-ADV-VAD Interpolated Sonde (IS) VAP SACR-ADV-VAD IS Wind Speed (m/s) IS Wind Speed (m/s) (Sounding Times) VAD Wind Speed (m/s) DL Wind Speed (m/s) VAD Wind Speed (m/s) 4. Other Code Sprint SACR-ADV Products SACR-ADV-QVP (Quasi-ver;cal profile) SACR-ADV-3D3C (3D gridded & domain cloud frac;on) Interpolated Sonde (IS) VAP SACR-ADV-VAD Interpolated Sonde (IS) VAP SACR-ADV-VAD VAD Wind Speed (m/s) VAD Wind Speed (m/s) IS Wind Speed (m/s) (Sounding Times) IS Wind Speed (m/s) DL Wind Speed (m/s) VAD Wind Direc;on (deg) IS Wind Direc;on (deg) (Sounding Times) IS Wind Direc;on (deg) DL Wind Direc;on (deg) VAD Wind Direc;on (deg) VAD Wind Direc;on (deg) IS Wind Direc;on (deg) (Sounding Times) IS Wind Direc;on (deg) DL Wind Direc;on (deg) VAD Wind Direc;on (deg) Lhermibe, RM, and DA Atlas. 1961, "PrecipitaKon moKon by pulse Doppler radar." Proc. 9th Weather Radar Conf., Boston, American Meteorological Society, Boston, Mass., 498-503. Kollias, 2014 QVPs of reflecKvity, differenKal reflecKvity, specific differenKal phase, correlaKon coefficient, spectrum width and linear depolarizaKon raKo Reflec;vity, OLI, 20160524 3. Summary Evalua;on Plots: SGP August 2012 Data availability: OLI: 20160328 - 20160909 Tradi;onally applied to plan posi;on indicator (PPI) scan Here, applied to HSRHI scan Browning & Wexler 1968 Browning, K.; Wexler, R. The determinaKon of kinemaKc properKes of a wind field using Doppler radar. J. Appl. Meteorol. 1968, 7, 105–113. VAD Wind Direc;on (deg) VAD Wind Direc;on (deg) VAD Wind Speed (m/s) VAD Wind Speed (m/s) IS Wind Speed (m/s) (Sounding Times) IS Wind Direc;on (deg) (Sounding Times) IS Wind Speed (m/s) IS Wind Direc;on (deg) VAD vs. IS VAD vs. IS at Sounding Times Masked to match SACR-ADV-VAD No Mask Masked to match SACR-ADV-VAD No Mask Masked to match SACR-ADV-VAD No Mask Masked to match SACR-ADV-VAD No Mask Sounding ;mes Wind Speed (m/s) Wind Speed (m/s) Wind Direc;on (deg) Wind Direc;on (deg) Wind Direc;on (deg) Wind Direc;on (deg) Wind Speed (m/s) Wind Speed (m/s) Sounding ;mes Sounding ;mes Sounding ;mes • Gridded reflecKvity • Gridded mean Doppler velocity • Gridded spectrum width • Cloud fracKon • CFADs

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Page 1: Evalua;on of SACR ADVance Velocity-Azimuth Display (SACR

SACR-ADV-VADDopplerLidar(DL)

SACR-ADV-VADDopplerLidar(DL)DopplerLidar(DL) SACR-ADV-VAD

SACR-ADV-VADDopplerLidar(DL)

DataProduct

TimeResolu;on

HeightResolu;on

MaximumHeight

Condi;ons CurrentProductAvailability

SACR-ADV-VAD ~0.5hour 50m 15km Cloud/precipita;onscaLerers

Limitedandinevalua;on:ENA:201612–201702OLI:201612–201702SGP:201208PVC:201209TMP:201408

Sonde 6–12hour,sitedependent

~5–12m ~25km Nearlyall Rou;neatcentralfacility

InterpolatedSonde(IS)

1min 20m;coarserabove~3.5km

~25km Nearlyall Rou;neatcentralfacili;es,orsoon-to-be

RadarWindProfiler(RWP)

10min 62.5m ~1.6–2.2km Nearlyall

Limitedandinevalua;on:ENA:201505–201509,201605–201609SGP+BoundaryFacili;es:201505–201509,201605–201609

DopplerLidar(DL) 0.25–1hour 26m ~1.5–2.0km Nearlyall Rou;neatcentralfacility&boundaryfacili;es

TamiToto1,KarenJohnson1,Ka;aLamer2,ScoLGiangrande1,PavlosKollias31BrookhavenNa-onalLaboratory,2PennsylvaniaStateUniversity,3StonyBrookUniversity

Evalua;onofSACRADVanceVelocity-AzimuthDisplay(SACR-ADV-VAD)Value-AddedProduct

KASACR

Here,theVADtechniqueisappliedtotheKa-BandmillimeterwavelengthScanningARMCloudRadar(KASACR) in the SACR ADVance Velocity-AzimuthDisplay (SACR-ADV-VAD) Value-Added Product(VAP).TheVAPcomplementsinfrequentsoundingsbyprovidingprofilesofhorizontalwindspeedanddirecKon in-cloud every Kme the SACR operatesthe Hemispherical Sky Range-Height Indicator(HSRHI)scanstrategy.

Kollias,P.,N.Bharadwaj,K.Widener,I.Jo,andK.Johnson,2014:ScanningARMCloudRadars.PartI:OperaKonalSamplingStrategies.J.Atmos.OceanicTechnol.,31,569–582,doi:10.1175/JTECH-D-13-00044.1.

1.Evalua;onExample#1:SouthernGreatPlains(SGP)August4,2012 2.Evalua;onExample#2:EasternNorthAtlan;c(ENA)January16,2017

TheVelocityAzimuthDisplay(VAD)techniquehashistoricallybeenusedtoretrieveverKcalprofilesofthewindusingweatherradars (LhermibeandAtlas,1961).ScanningradarmeanDopplervelocityobservaKonsataconstantrangearecombinedtoesKmatewindspeedanddirecKonataparKcularheightabovetheradarlocaKon.

Abstract

WindSpeed

WindDirec;on

WindSpeed

WindDirec;on

InterpolatedSonde(IS)VAP SACR-ADV-VAD InterpolatedSonde(IS)VAP SACR-ADV-VAD

ISWindSpeed(m/s) ISWindSpeed(m/s)(SoundingTimes)

VADWindSpeed(m

/s)

DLWindSpeed(m/s)

VADWindSpeed(m

/s)

4.OtherCodeSprintSACR-ADVProductsSACR-ADV-QVP(Quasi-ver;calprofile) SACR-ADV-3D3C(3Dgridded&domaincloudfrac;on)

InterpolatedSonde(IS)VAP SACR-ADV-VAD InterpolatedSonde(IS)VAP SACR-ADV-VAD

VADWindSpeed(m

/s)

VADWindSpeed(m

/s)

ISWindSpeed(m/s)(SoundingTimes)

ISWindSpeed(m/s)

DLWindSpeed(m/s)

VADWindDirec;on

(deg)

ISWindDirec;on(deg)(SoundingTimes)

ISWindDirec;on(deg)

DLWindDirec;on(deg)

VADWindDirec;on

(deg)

VADWindDirec;on

(deg)

ISWindDirec;on(deg)(SoundingTimes)

ISWindDirec;on(deg)

DLWindDirec;on(deg)

VADWindDirec;on

(deg)

Lhermibe,RM,andDAAtlas.1961,"PrecipitaKonmoKonbypulseDopplerradar."Proc.9thWeatherRadarConf.,Boston,AmericanMeteorologicalSociety,Boston,Mass.,498-503.

Kollias,2014

QVPs of reflecKvity, differenKal reflecKvity, specificdifferenKalphase,correlaKoncoefficient,spectrumwidthandlineardepolarizaKonraKo

Reflec;vity,OLI,20160524

3.SummaryEvalua;onPlots:SGPAugust2012

Dataavailability:OLI:20160328-20160909

Tradi;onallyappliedtoplanposi;onindicator(PPI)scan

Here,appliedtoHSRHIscan

Browning&Wexler1968

Browning,K.;Wexler,R.ThedeterminaKonofkinemaKcproperKesofawindfieldusingDopplerradar.J.Appl.Meteorol.1968,7,105–113.

VADWindDirec;on

(deg)

VADWindDirec;on

(deg)

VADWindSpeed(m

/s)

VADWindSpeed(m

/s)

ISWindSpeed(m/s)(SoundingTimes)

ISWindDirec;on(deg)(SoundingTimes)

ISWindSpeed(m/s) ISWindDirec;on(deg)

VADvs.IS VADvs.ISatSoundingTimes

MaskedtomatchSACR-ADV-VADNoMask

MaskedtomatchSACR-ADV-VADNoMask

MaskedtomatchSACR-ADV-VADNoMask

MaskedtomatchSACR-ADV-VADNoMask

Sounding;mes

WindSpeed(m

/s)

WindSpeed(m

/s)

WindDirec;on

(deg)

WindDirec;on

(deg)

WindDirec;on

(deg)

WindDirec;on

(deg)

WindSpeed(m

/s)

WindSpeed(m

/s)

Sounding;mes

Sounding;mes Sounding;mes

•  GriddedreflecKvity•  GriddedmeanDopplervelocity•  Griddedspectrumwidth

•  CloudfracKon•  CFADs

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