DC FieldValueLanguage
dc.contributor.authorRuprecht, Daniel-
dc.contributor.authorKlein, Rupert-
dc.contributor.authorMajda, Andrew J.-
dc.date.accessioned2021-10-14T10:36:14Z-
dc.date.available2021-10-14T10:36:14Z-
dc.date.issued2010-08-01-
dc.identifier.citationJournal of the Atmospheric Sciences 67 (8): 2504-2519 (2010-08-01)de_DE
dc.identifier.issn0022-4928de_DE
dc.identifier.urihttp://hdl.handle.net/11420/10530-
dc.description.abstractStarting from the conservation laws for mass, momentum, and energy together with a three-species bulk microphysics model, a model for the interaction of internal gravity waves and deep convective hot towers is derived using multiscale asymptotic techniques. From the leading-order equations, a closed model for the large-scale flow is obtained analytically by applying horizontal averages conditioned on the small-scale hot towers. No closure approximations are required besides adopting the asymptotic limit regime on which the analysis is based. The resulting model is an extension of the anelastic equations linearized about a constant background flow. Moist processes enter through the area fraction of saturated regions and through two additional dynamic equations describing the coupled evolution of the conditionally averaged small-scale vertical velocity and buoyancy.Atwo-way coupling between the large-scale dynamics and these small-scale quantities is obtained: moisture reduces the effective stability for the large-scale flow, and microscale up-and downdrafts define a large-scale averaged potential temperature source term. In turn, large-scale vertical velocities induce small-scale potential temperature fluctuations due to the discrepancy in effective stability between saturated and nonsaturated regions. The dispersion relation and group velocity of the system are analyzed and moisture is found to have several effects: (i) it reduces vertical energy transport by waves, (ii) it increases vertical wavenumbers but decreases the slope at which wave packets travel, (iii) it introduces a new lower horizontal cutoff wavenumber in addition to the well-known high wavenumber cutoff, and (iv)moisture can cause critical layers. Numerical examples reveal the effects of moisture on steady-state and time-dependent mountain waves in the present hot-tower regime. © 2010 American Meteorological Society.en
dc.language.isoende_DE
dc.relation.ispartofJournal of the atmospheric sciencesde_DE
dc.subjectConvectionde_DE
dc.subjectGravity wavesde_DE
dc.subjectInterenal wavesde_DE
dc.subjectMesoscale processesde_DE
dc.subjectMoisturede_DE
dc.titleModulation of internal gravity waves in a multiscale model for deep convection on mesoscalesde_DE
dc.typeArticlede_DE
dc.type.diniarticle-
dcterms.DCMITypeText-
tuhh.abstract.englishStarting from the conservation laws for mass, momentum, and energy together with a three-species bulk microphysics model, a model for the interaction of internal gravity waves and deep convective hot towers is derived using multiscale asymptotic techniques. From the leading-order equations, a closed model for the large-scale flow is obtained analytically by applying horizontal averages conditioned on the small-scale hot towers. No closure approximations are required besides adopting the asymptotic limit regime on which the analysis is based. The resulting model is an extension of the anelastic equations linearized about a constant background flow. Moist processes enter through the area fraction of saturated regions and through two additional dynamic equations describing the coupled evolution of the conditionally averaged small-scale vertical velocity and buoyancy.Atwo-way coupling between the large-scale dynamics and these small-scale quantities is obtained: moisture reduces the effective stability for the large-scale flow, and microscale up-and downdrafts define a large-scale averaged potential temperature source term. In turn, large-scale vertical velocities induce small-scale potential temperature fluctuations due to the discrepancy in effective stability between saturated and nonsaturated regions. The dispersion relation and group velocity of the system are analyzed and moisture is found to have several effects: (i) it reduces vertical energy transport by waves, (ii) it increases vertical wavenumbers but decreases the slope at which wave packets travel, (iii) it introduces a new lower horizontal cutoff wavenumber in addition to the well-known high wavenumber cutoff, and (iv)moisture can cause critical layers. Numerical examples reveal the effects of moisture on steady-state and time-dependent mountain waves in the present hot-tower regime. © 2010 American Meteorological Society.de_DE
tuhh.publisher.doi10.1175/2010JAS3269.1-
tuhh.type.opus(wissenschaftlicher) Artikel-
dc.type.driverarticle-
dc.type.casraiJournal Article-
tuhh.container.issue8de_DE
tuhh.container.volume67de_DE
tuhh.container.startpage2504de_DE
tuhh.container.endpage2519de_DE
dc.identifier.scopus2-s2.0-77958546972de_DE
local.publisher.peerreviewedtruede_DE
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.creatorOrcidRuprecht, Daniel-
item.creatorOrcidKlein, Rupert-
item.creatorOrcidMajda, Andrew J.-
item.cerifentitytypePublications-
item.mappedtypeArticle-
item.openairetypeArticle-
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.creatorGNDRuprecht, Daniel-
item.creatorGNDKlein, Rupert-
item.creatorGNDMajda, Andrew J.-
item.languageiso639-1en-
crisitem.author.deptMathematik E-10-
crisitem.author.orcid0000-0003-1904-2473-
crisitem.author.parentorgStudiendekanat Elektrotechnik, Informatik und Mathematik-
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