lecture2-lauritzen - 图文

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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

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