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Medientyp:
E-Artikel
Titel:
The vortex gas scaling regime of baroclinic turbulence
Beteiligte:
Gallet, Basile;
Ferrari, Raffaele
Erschienen:
Proceedings of the National Academy of Sciences, 2020
Erschienen in:Proceedings of the National Academy of Sciences
Sprache:
Englisch
DOI:
10.1073/pnas.1916272117
ISSN:
0027-8424;
1091-6490
Entstehung:
Anmerkungen:
Beschreibung:
<jats:title>Significance</jats:title>
<jats:p>Developing a theory of climate requires an accurate parameterization of the transport induced by turbulent eddies. A major source of turbulence in the midlatitude planetary atmospheres and oceans is the baroclinic instability of the large-scale flows. We present a scaling theory that quantitatively predicts the local heat flux, eddy kinetic energy, and mixing length of baroclinic turbulence as a function of the large-scale flow characteristics and bottom friction. The theory is then used as a quantitative parameterization in the case of meridionally dependent forcing in the fully turbulent regime. Beyond its relevance for climate theories, our work is an intriguing example of a successful closure for a fully turbulent flow.</jats:p>