dc.contributor.author
Hirt, Mirjam
dc.contributor.author
Craig, George C.
dc.contributor.author
Klein, Rupert
dc.date.accessioned
2023-06-05T05:23:29Z
dc.date.available
2023-06-05T05:23:29Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/39690
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-39408
dc.description.abstract
For both the meso- and synoptic scales, reduced mathematical models give insight into their dynamical behaviour. For the mesoscale, the weak temperature gradient approximation is one of several approaches, while for the synoptic scale the quasigeostrophic theory is well established. However, the way these two scales interact with each other is usually not included in such reduced models, thereby limiting our current perception of flow-dependent predictability and upscale error growth. Here, we address the scale interactions explicitly by developing a two-scale asymptotic model for the meso- and synoptic scales with two coupled sets of equations for the meso- and synoptic scales respectively. The mesoscale equations follow a weak temperature gradient balance and the synoptic-scale equations align with quasigeostrophic theory. Importantly, the equation sets are coupled via scale-interaction terms: eddy correlations of mesoscale variables impact the synoptic potential vorticity tendency and synoptic variables force the mesoscale vorticity (for instance due to tilting of synoptic-scale wind shear). Furthermore, different diabatic heating rates-representing the effect of precipitation-define different flow characteristics. With weak mesoscale heating relatable to precipitation rates of (sic)(6mm center dot h-1), the mesoscale dynamics resembles two-dimensional incompressible vorticity dynamics and the upscale impact of the mesoscale on the synoptic scale is only of a dynamical nature. With a strong mesosocale heating relatable to precipitation rates of O (60mm center dot h(-1)), divergent motions and three-dimensional effects become relevant for the mesoscale dynamics and the upscale impact also includes thermodynamical effects.
en
dc.format.extent
16 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
atmospheric dynamics
en
dc.subject
multiscale scale interactions
en
dc.subject
quasigeostrophic
en
dc.subject
synoptic scale
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
Scale interactions between the meso- and synoptic scales and the impact of diabatic heating
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1002/qj.4456
dcterms.bibliographicCitation.journaltitle
Quarterly Journal of the Royal Meteorological Society
dcterms.bibliographicCitation.number
753
dcterms.bibliographicCitation.pagestart
1319
dcterms.bibliographicCitation.pageend
1334
dcterms.bibliographicCitation.volume
149
dcterms.bibliographicCitation.url
https://doi.org/10.1002/qj.4456
refubium.affiliation
Mathematik und Informatik
refubium.affiliation.other
Institut für Mathematik
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refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1477-870X
refubium.resourceType.provider
WoS-Alert