use of merra-2 in the national solar radiation database
TRANSCRIPT
UseofMERRA-2intheNationalSolarRadiationDatabaseandBeyond
Dr.ManajitSengupta,AnthonyLopez,andAronHabte
NASAGoddardJune19,2016
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• NationalSolarRadiationDatabase(NSRDB)• PhysicalSolarModel(PSM)intheNSRDB• DatasetsrequiredfortheNSRDB• WhyMERRA-2isusedintheNSRDB?• UseofNSRDBingeneral• UseofNSRDBatNREL• Wishlistforfutureuse.
Outline
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• TheNSRDBseekstoadvanceourknowledgeofsolarradiationanditsapplicationforrenewableenergyandbeyond.
• TheNSRDBprovidesaseriallycompletedatabaseofsolarirradianceandmeteorological informationacrosstheUnitedStatesandinagrowingnumberofinternationallocations.
• TheNSRDBprovides18 years(+TypicalMeteorologicalYear)ofhalf-hourlydataata4x4-kmspatialresolution.
• TheNSRDBusesthephysics-basedmodel,thePSM.
NationalSolarRadiationDatabase
https://nsrdb.nrel.gov
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DataSetsintheNSRDB
• MERRA-2– Atmosphericpressure– Surfacealbedo– Aerosols
• Aerosolopticalthickness• Singlescatteringalbedo• AerosolAngstromparameter.
– Totalozone– Precipitablewater.
• GOES(PATMOS-Xretrievals)– Cloudeffectiveradius– Cloudopticaldepth– Cloudtype.
• ModerateResolutionImagingSpectroradiometer/NationalSnowandIceDataCenter– Surfacealbedo.
• Globalhorizontalirradiance(GHI)• Directnormalirradiance(DNI)• Diffusehorizontalirradiance(DHI)• Clear-skyGHI,DNI,andDHI• Cloudtype• Dewpoint*• Airtemperature*• Atmosphericpressure*• Relativehumidity*• Solarzenithangle• Precipitablewater• Winddirection*• Windspeed.*
UsedinthePSM: DeliveredtothePublic:
*Source:MERRA-2
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Temperature
Pressure
WindSpeed
PrecipitableWater
EvaluationofMeteorologicalDataforUseintheNSRDB
CFSR NARR MERRA
MERRAdatawerefoundtohavelowerroot-mean-squareerror(RMSE)comparedtoCFSR*andNARR*.
Comparisonwith216stationsfor2006–2012period.*ClimateForecastSystemReanalysis(CFSR)*NorthAmericanRegionalReanalysis(NARR)
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Usesinclude• Solarenergyprospecting• Solargeneratordesign• Cancerresearch• Educationandgeneralresearch• Powersystemmodelingand
planning• Microgridandrural
electrification• Solarvariability• Climatechangeresearch• Forecasting• Andmore…
HowIstheNSRDBUsed?
TheNSRDBandthusMERRA-2areusedbyavarietyofpublicandprivateorganizations.
TheNSRDBhasbecomeaheavilyuseddatasetinlessthantwoyearsofdeployment.Innovativesmallcompaniesaresignificantusers,leadingtoareductioninbarrierstosolardevelopment.Morethan$20millionininternalNRELresearchongridintegration,energymodeling,resourceplanning,andproductioncostmodeling arefacilitatedbytheNSRDB.
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• Grid-planningmodeling(ReEDS,RPM)
• Gridoperationsmodeling(PLEXOS)
• DistributedGenerationMarketDemandmodeling(dGen)
• Techno-economicassessment(reV)
• Performanceandfinancialmodeling(SAM).
HowIstheNSRDBUsedatNREL?
LargeanalysisandvisionstudiesuseavarietyofmodelsthatusetheNSRDB:
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• Standardizedorconsensusmethodologyforspatialdownscalingofthe~0.5-degreeMERRA-2data
• Increaseinspatialresolution
• Additionofdatasets:o Dewpointo Relativehumidityo Surfaceelevationinformation.
OurWishListforMERRA-2andBeyond