Charney–Eliassen model
E542053
The Charney–Eliassen model is a foundational quasi-geostrophic framework in atmospheric dynamics used to describe large-scale, balanced motions such as midlatitude cyclones and jet streams.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
atmospheric dynamics model
ⓘ
quasi-geostrophic model ⓘ theoretical framework ⓘ |
| appliesTo |
midlatitudes
ⓘ
synoptic-scale atmospheric motions ⓘ |
| assumes |
geostrophic balance
ⓘ
hydrostatic balance ⓘ small Rossby number ⓘ small perturbations about a basic state ⓘ |
| basedOn | quasi-geostrophic approximation ⓘ |
| basicState |
thermal wind balanced jet
ⓘ
zonal mean flow ⓘ |
| category |
balanced atmospheric models
ⓘ
large-scale circulation models ⓘ |
| coreConcept |
potential vorticity conservation
ⓘ
thermal wind balance ⓘ thermodynamic energy equation ⓘ vorticity equation ⓘ |
| describes |
jet streams
ⓘ
large-scale balanced atmospheric motions ⓘ midlatitude cyclones ⓘ |
| field |
atmospheric dynamics
ⓘ
geophysical fluid dynamics ⓘ |
| historicalRole | foundational framework in synoptic-scale meteorology ⓘ |
| mathematicalForm |
elliptic partial differential equation for streamfunction
ⓘ
set of linearized quasi-geostrophic equations ⓘ |
| namedAfter |
Arnt Eliassen
NERFINISHED
ⓘ
Jule Gregory Charney NERFINISHED ⓘ |
| neglects |
ageostrophic inertia-gravity waves
ⓘ
small-scale turbulence ⓘ |
| relatedTo |
Rossby waves
NERFINISHED
ⓘ
baroclinic instability theory ⓘ quasi-geostrophic theory NERFINISHED ⓘ |
| scale | synoptic scale ⓘ |
| spatialScale | thousands of kilometers ⓘ |
| timeScale | days ⓘ |
| usedFor |
analyzing jet stream dynamics
ⓘ
balanced flow analysis ⓘ diagnosing secondary circulations ⓘ idealized studies of midlatitude cyclones ⓘ studying baroclinic development ⓘ |
| usedIn |
idealized numerical experiments
ⓘ
theoretical meteorology education ⓘ |
| uses |
pressure coordinates
ⓘ
streamfunction formulation ⓘ |
| validUnder | large-scale slowly varying flow conditions ⓘ |
Referenced by (1)
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