HorizontalcomputationalspaceRedlines:regularlatitude-longitudegridGrid-cellsizede?nesthesmallestscalethatcanberesolved(=e?ectiveresolution!)Manyimportantprocessestakingplacesub-grid-scalethatmustbeparameterizedLooselyspeaking,theparameterizationscomputegrid-cellaveragetendenciesduetosub-grid-scaleprocessesintermsofthe(resolvedscale)atmosphericstateInmodelingjargonparameterizationsarealsoreferredtoasphysics(whatisunphysicalaboutresolvedscaledynamics?)PeterHjortLauritzen(NCAR)AtmosphereModelingI:Intro&DynamicsAugust14,20173/36Multi-scalenatureofatmospheredynamics
few hundred mmm scalefew thousand kmtens of kmEarth’s radius(fromThuburn2011)
SeasonalMonthlyBiweeklyFigureindicatesschematicallythetimescalesandhorizontalHourlyspatialscalesofarangeofatmosphericphenomena(FigurefromThuburn2011).MinutesSecondsPeterHjortLauritzen(NCAR)AtmosphereModelingI:Intro&DynamicsAugust14,20174/36
Multi-scalenatureofatmospheredynamics
few hundred mmm scalefew thousand kmtens of kmEarth’s radius(fromThuburn2011)
SeasonalMonthlyBiweeklyFigureindicatesschematicallythetimescalesandhorizontalHourlyspatialscalesofarangeofatmosphericphenomena(FigurefromThuburn2011).MinutesSecondsO(104km):largescalecirculations(Asiansummermonsoon).
PeterHjortLauritzen(NCAR)AtmosphereModelingI:Intro&DynamicsAugust14,20174/36
Multi-scalenatureofatmospheredynamics
few hundred mmm scalefew thousand kmtens of kmEarth’s radius(fromThuburn2011)
SeasonalMonthlyBiweeklyFigureindicatesschematicallythetimescalesandhorizontalHourlyspatialscalesofarangeofatmosphericphenomena(FigurefromThuburn2011).MinutesSecondsO(104km):largescalecirculations(Asiansummermonsoon).
O(104km):undulationsinthejetstreamandpressurepatternsassociatedwiththelargestscaleRossbywaves(calledplanetarywaves)
PeterHjortLauritzen(NCAR)AtmosphereModelingI:Intro&DynamicsAugust14,20174/36
Multi-scalenatureofatmospheredynamics
few hundred mmm scalefew thousand kmtens of kmEarth’s radius(fromThuburn2011)
SeasonalMonthlyBiweeklyFigureindicatesschematicallythetimescalesandhorizontalHourlyspatialscalesofarangeofatmosphericphenomena(FigurefromThuburn2011).MinutesSecondsO(104km):largescalecirculations(Asiansummermonsoon).
O(104km):undulationsinthejetstreamandpressurepatternsassociatedwiththelargestscaleRossbywaves(calledplanetarywaves)O(103km):cyclonesandanticyclones
PeterHjortLauritzen(NCAR)AtmosphereModelingI:Intro&DynamicsAugust14,20174/36
lecture2-lauritzen - 图文
