Sentences with phrase «vorticity at»

Below are animations of the zonal wind and vorticity at the level in the model that corresponds roughly to the estimated level of the cloud tops from which the observed flows are inferred.

Not exact matches

In the study, the research team identified three distinctive characteristic regimes with regard to the degree of slip at the interface and revealed the underlying molecular mechanisms for each regime: (i) the z - to - x chain rotation mechanism in the vorticity plane in the weak flow regime, which effectively diminishes the wall friction against chain movement along the flow direction, (ii) the repetitive chain detachment - attachment (out - of - plane wagging) and disentanglement mechanism in the intermediate regime, and (iii) irregular (chaotic) chain rotation and tumbling mechanisms in the strong flow regime.

When a storm forms, it spins in one direction at the surface, and the opposite direction toward the upper atmosphere, creating a «dipole of vorticity.»

2) As Howie notes, the large - scale characteristics needed for tornadoes are reasonably known: strong buoyancy (high temps and plenty of moisture) at low levels, and wind shear that creates the vorticity for rotation.

The vorticity is shown in polar view at the level in the model that corresponds roughly to the estimated level of the cloud tops from which the observed flow is inferred (0.75 bar).

Extratropical cyclones (ETCs) intensify due to three vertically interacting positive potential vorticity anomalies that are associated with warm temperature anomalies at the surface, condensational heating in the lower - level atmosphere, and stratospheric intrusion in the upper - level atmosphere.

Thus, vorticity can diffuse, but it can not disappear except at the boundaries of the atmosphere.

If the net vorticity was zero to begin with, the Navier - Stokes equations promise it will still be zero at the end.

I will add dissipative terms at the appropriate time when discussing the nonlinear cascade of vorticity.

Thus the hyperviscosity is larger at lower resolutions in order to keep the smaller scales of vorticity that appear in the higher resolutions from forming.

Meteorologically speaking, that extra vorticity — literally a measure of energy causing the atmosphere to form complex features at the local level — could bring a foot of snow in only a few hours over very narrow strips.

Finds that, in the Atlantic, potential intensity, low - level vorticity, and vertical wind shear strongly covary and are also highly correlated with sea surface temperature, at least during the period in which reanalysis products are considered reliable