What happens when the upper-level divergence of air is greater than the lower-level convergence of air in a storm?

What happens when the upper-level divergence of air is greater than the lower-level convergence of air in a storm?

When upper-level divergence is stronger than lower-level convergence, more air is taken out at the top than is brought in at the bottom. Surface pressure drops, and the low intensifies, or “deepens.”

How does upper-level divergence convergence influence surface high low pressure?

For example, an area of diverging air in the upper troposphere will lower the air density aloft, encouraging the uplift of lower-level air and enhancing a surface low beneath it. Conversely, upper troposphere convergence will increase density there, resulting in increased surface pressure.

What happens when surface winds converge?

The convergence of horizontal winds causes air to rise, whereas the divergence of horizontal winds causes downward motion of the air (subsidence). …

Are surface winds around a high pressure area convergent or divergent?

In this case, though, the pressure gradient is outward from the center of the high, so the result is that surface wind spirals away from the center. This causes divergence (convergence) in the center of the high (low) pressure system at the surface.

Why strong upper level divergence will cause the pressure in the center of a surface low to decrease?

Divergence is removing more air than is being added by surface convergence. The surface low pressure will decrease. The upper level divergence is still stronger than the surface convergence so the surface low pressure will decrease even more and the storm will intensify.

What happens when a surface low strengthens?

Warm air is found west of the HIGH and to the east of the LOW. This is a good location for a surface LOW to form, develop, and strengthen (strengthening means the pressure in the surface low will get even lower than it is now. This is also called “deepening”).

What happens when an upper-level low lies directly above a surface low?

​When an upper-level low lies directly above a surface low, ​the pressure of the surface low will decrease. ​a wave cyclone will begin to form.

What is the force responsible for wind speed on Earth’s surface?

In summary, the wind is controlled by the pressure gradient force (differences in barometric pressure), the Coriolis Force and friction. Wind speed is primarily dictated by the pressure gradient force, while all three controllers combine to guide the wind’s direction.

What is the primary force that causes all winds?

Winds are directed and driven by the pressure gradient force (moves air from areas of high pressure to areas of low pressure), The Coriolis force is a deflection in the path of winds or ocean currents caused by the rotation of Earth; Coriolis force deflects objects to the RIGHT in the Northern Hemisphere and to the …

Are surface winds around a low pressure area convergent?

Surface Winds, Forced Rising and Sinking Air, and Weather near Surface Low and High Pressure. In realistic surface air flow, the wind pattern is just slightly convergent toward lines or points of low pressure.

What kind of vertical motion is surface convergence usually associated with?

Divergence aloft is associated with rising air throughout the troposphere, which is associated with low pressure and convergence at the surface. Convergence aloft is associated with sinking air throughout the troposphere, which is associated with high pressure at the surface and thus divergence at the surface.

What happens when an upper level low lies directly above a surface low?

What happens when wind diverges into weaker wind?

The convergence due to stronger wind moving into weaker wind replenishes the mass lost due to the divergence in the diffluent flow. In the bottom diagram below, notice in the diffluent pattern that strong wind is moving into weaker wind and the air streams are diverging over distance also.

What happens if the jet stream divergence is greater?

If the divergence of the jet stream is greater than the convergence of air at the surface low-pressure center below it, what will happen to the surface winds? The surface winds will likely get stronger. What other natural hazards are associated with tornado formation?

How does convergence and divergence affect pressure systems?

This convergence and divergence is what helps to enhance or suppress the pressure systems moving along the surface. For example, an area of diverging air in the upper troposphere will lower the air density aloft, encouraging the uplift of lower-level air and enhancing a surface low beneath it.

What happens when air converges at a low pressure center?

However, at Earth’s surface, air converges at a low-pressure center. If the divergence of the jet stream is greater than the convergence of air at the surface low-pressure center below it, what will happen to the surface winds? The surface winds will likely get stronger.