Questions tagged [atmospheric-circulation]

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25
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481 views

Is it possible for a sting jet to form over a continental landmass?

Sting jets are thought to be responsible for some of the most damaging winds associated with extratropical cyclones in the mid-latitudes. So far they have only been confirmed in the European region, ...
5
votes
0answers
138 views

Forced shallow-water equation with diabatic heating as the source term

How to obtain the divergence of velocity field $\left(\nabla.\mathbf{u}\right)$ with ${Q}$ (something proportional to the diabatic heating rate) as the source term from the thermodynamic equation? ...
4
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0answers
88 views

Physics based circulation models

How useful are physics based models when considering circulations at synoptic scales? Are they useful? Can we not make predictions, observe trends based on data alone? I am studying A.E.Gill's model ...
3
votes
0answers
69 views

Initiation of Rossby waves during MJO

I am trying to understand the basic dynamics of MJO, where I find several studies which relate it to the initiation of equatorial Rossby and Kelvin waves. Though MJO is an eastward propagating wave, I ...
3
votes
0answers
38 views

For fine particles to get dispersed throughout the globe via atmospheric circulation, in what level of the atmosphere would they have to travel?

For molecular-sized particles to disperse around the entire planet, would they have to reach the stratosphere, or could air currents in the troposphere distribute them? Are particles dispersed ...
2
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0answers
31 views

Why does cloud cover seem to "ride" a wave that propagates westward near the equator in this video?

https://www.youtube.com/watch?v=wVRbeGc_6zM Notice that the cloud cover over Africa and South America is correlated in a way that seems to be highlighting some kind of large-scale easterly wave ...
2
votes
0answers
49 views

Application of vorticity tendency equation

I have a question about the dynamics of westward propagating vortices. In meteorology, the vorticity tendency is often used to explain the westward propagation of vortices (cyclonic circulation). A ...
2
votes
0answers
119 views

Internal energy, enthalpy, and work in the atmosphere

I'm writing a toy radiative-convective atmospheric model and need to relate the heat flux convergences (either surface sensible heat flux or the radiative flux) to changes in atmospheric layer ...
1
vote
0answers
197 views

Buoyancy frequency

The buoyancy frequency, $N$ is defined as $N^2=\frac{gd\theta}{\theta dz}$, where $\theta$ is the potential temperature (I see it as a measure of the deviation from the adiabatic nature), $z$ is the ...
0
votes
0answers
98 views

Why is the mean meridional mass stream function multiplied by g/2π?

I was reading this material on the mean atmospheric meridional circulation and the definition of the meridional mass streamfunction: http://www.geo.cornell.edu/geology/faculty/Cook/Hadley_book.pdf (...