JULES as a community model and land surface scheme for weather ...
JULES as a community model and land surface scheme for weather ...
JULES as a community model and land surface scheme for weather ...
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<strong>JULES</strong> <strong>as</strong> a <strong>community</strong> <strong>model</strong> <strong>and</strong>l<strong>and</strong> <strong>surface</strong> <strong>scheme</strong> <strong>for</strong> <strong>weather</strong> /climate <strong>model</strong>sMartin Best<strong>JULES</strong> meeting12 th January 2012© Crown copyright Met Office
Overview• History of <strong>JULES</strong>• Current state• Future plans© Crown copyright Met Office
History© Crown copyright Met Office
Origins of <strong>JULES</strong>Unified ModelMOSESTRIFFID• Met Office Surface Exchange Scheme‣Used in both global <strong>and</strong> regional operational <strong>model</strong>s since late 90’s /early 00’s‣Used in HadCM3, HadGEM <strong>and</strong> HadGEM2• Top-down Representation of Interactive Flora <strong>and</strong> FoliageIncluding Dynamics‣Used in version of HadCM3 <strong>for</strong> carbon cycle feedbacks© Crown copyright Met Office
<strong>JULES</strong> / UM timeline•UM vn.5.5‣MOSES•UM vn.6.xvn.7.4‣MOSES•UM vn.7.5vn.8.0‣MOSES•<strong>JULES</strong> vn.2.2vn.3.0•UM vn.8.1<strong>JULES</strong>vn.1.0<strong>JULES</strong>vn.2.1<strong>JULES</strong> vn.2.2vn.3.0<strong>JULES</strong>vn.3.1© Crown copyright Met Office
<strong>JULES</strong> governanceManagementcommitteeScience steeringcommittee<strong>JULES</strong> codingst<strong>and</strong>ardsSixmonthly<strong>JULES</strong>workshops/meetings<strong>JULES</strong> upgradeprocedures© Crown copyright Met Office
<strong>JULES</strong> Module StructureATMOSPHEREVOC, CH 4 FluxesCO 2 FluxesCO 2 , CO <strong>and</strong>Aerosol Fluxesτ, H, LE FluxesBiogenicFluxesWildPlantPhysiologyMercadoSurface ConductanceSurfaceExchangeBestUrbanGrimmondNPP, Resp FluxesSurface ParametersEvaporative FluxesNAvailabilityCropModellingOsborneVegetationDynamics (+ Fire)SitchSnowCoverEsserySurfaceHydrologyBlythRunoffLitterfallSoil WaterStressInfiltrationSoil Carbon& NitrogenSmithSoil T & MoistureSoil Moisture &TemperatureGedneyTechnical GroupBestData AssimilationWilliamsValidation & CalibrationPryorClimate ImpactsBetts© Crown copyright Met Office
Radiation interceptionA n = net carbon uptake• Distribution ofradiation throughvegetation canopy= Total photosynthesis (GPP) – leaf respirationLight responsediurnal cycle• Inclusion onnitrogen availabilityBig leaf<strong>model</strong>• Impact ofdirect/diffuseradiationMulti-layer<strong>model</strong>© Crown copyright Met OfficeCourtesy of Lina Mercado
New snow <strong>scheme</strong>(Comparison by MetNo.)ObservedModelled3-layersJunAugOctDecFeb Apr JunJunAugOctDecFeb Apr JunJunAugOctDecFeb Apr Jun2010 2011 2010 2011 2010 2011Jun Aug Oct Dec Feb Apr Jun© Crown copyright Met OfficeJunAugOctDecFeb Apr JunJun Aug Oct Dec Feb Apr JunCourtesy of Dagrun Schuler
Current state© Crown copyright Met Office
St<strong>and</strong>ard referencesBest et al.: The Joint UK L<strong>and</strong> Environment Simulator(<strong>JULES</strong>), <strong>model</strong> description – Part 1: Energy <strong>and</strong> waterfluxes, Geosci. Model Dev., 4, 677–699,doi:10.5194/gmd-4-677-2011, 2011Clark et al.: The Joint UK L<strong>and</strong> Environment Simulator(<strong>JULES</strong>), <strong>model</strong> description – Part 2: Carbon fluxes <strong>and</strong>vegetation dynamics, Geosci. Model Dev., 4, 701–722,doi:10.5194/gmd-4-701-2011, 2011© Crown copyright Met Office
Multiple <strong>for</strong>cing frameworkObservationaldata<strong>JULES</strong>OutputGCMIMOGENInitialconditions© Crown copyright Met Office
<strong>JULES</strong> benchmarking: 1Map showing 4 Atmospheric CO2 concentration stations10 FLUXNET stations7 rivers b<strong>as</strong>insResults of <strong>JULES</strong> vn.2.1.2 <strong>for</strong> atmosphericCO2 concentrations, river flow <strong>and</strong> LAICO2 concentration(<strong>model</strong> red, obs blue)River Flow(<strong>model</strong> red, obs blue)LAI(<strong>model</strong> red, obs blue)20 years of NDVI data(co Sietse Los, Swansea)© Crown copyright Met Office
<strong>JULES</strong> benchmarking: 2Comparison of <strong>JULES</strong> vn.2.1.2 against 10 (9 <strong>for</strong> CO2) Fluxnet SitesNormalised Evaporation(<strong>model</strong> red, obs blue)Photosynthesis(<strong>model</strong> red, obs blue)Respiration(<strong>model</strong> red, obs blue)© Crown copyright Met Office
FLakeWindermere, 2007• Adjustments to st<strong>and</strong>ard FLake‣<strong>JULES</strong> <strong>surface</strong> exchange‣Coupled via <strong>surface</strong> heat flux‣Thermal conductivity calculated fromFLake temperature gradients• Issues to be addressed1m buoy T v <strong>surface</strong> T‣Conservation of energy during snow<strong>and</strong> ice melt‣Conservation of water <strong>for</strong> climateapplications© Crown copyright Met Office
Choice of 3 urban <strong>scheme</strong>sUrban comparison stage 4 average RMS errorsOne tile Two tiles MORUSESK↑ L↑ Q*QhQeSimple <strong>model</strong>sModerate complexity<strong>model</strong>sComplex <strong>model</strong>s© Crown copyright Met Office
Permafrost• Can simulate physicalextent of permafrost• Issues with soilmoisture drainageaffecting soiltemperatures• Need to includebiophysical processes(such <strong>as</strong> CO 2 or CH 4rele<strong>as</strong>e)Courtesy of Eleanor Burke© Crown copyright Met Office
Future plans© Crown copyright Met Office
Planned <strong>JULES</strong> developments<strong>JULES</strong> versionNew science3.1 FlakeNew I/O interfaceFull <strong>JULES</strong> repositoryRemoval of mirror in UM at next subsequent UM rele<strong>as</strong>e3.2 CropsTRIPIrrigationMEGAN3.3 ECOSSEFUN3.4 ED?© Crown copyright Met Office
Merging <strong>JULES</strong> <strong>and</strong> CABLE<strong>JULES</strong> framework<strong>JULES</strong>CABLE<strong>JULES</strong> frameworkCABLEcropsCABLEvegCABLEurban<strong>JULES</strong>veg<strong>JULES</strong>crops<strong>JULES</strong>surf exchCABLEsoilCABLEsnow<strong>JULES</strong>snow<strong>JULES</strong>urban<strong>JULES</strong>soilCABLEsurf exch© Crown copyright Met Office
<strong>JULES</strong> configurations<strong>JULES</strong>ControlI/O Initialisation Science ConfigurationsGL x.x RL x.x JIM x.x© Crown copyright Met Office
Questions© Crown copyright Met Office
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