Sentences with phrase «parcels of air move»

Parcels of air move around the low pressure system.

Parcels of air moving through the atmosphere are called wind, convection, I'm glad you have heard of convection, it is one of the three modes of transport for heat, as thermal energy on the move.

That's essentially equivalent to the well known fact that adiabatic condensation occurs always in ascending convection where the parcel of air moves to lower pressure and cools.

Not exact matches

Earth's rotation makes these disturbances spin by means of the Coriolis effect, an apparent deflection of moving parcels of air that forces storms to whirl counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

For reference, the amplification is related to the sensitivity of the moist adiabat to increasing surface temperatures (air parcels saturated in water vapour move up because of convection where the water vapour condenses and releases heat in a predictable way).

12) The answer is that due to any such imbalance the normal equilibrium distribution of Kinetic Energy (KE) and Potential Energy (PE) is upset and parcels of air start to move around differently relative to each other due to the changes in their respective KE and PE contents.

A parcel of air picking up water vapor at (near) the ITCZ moves poleward as well as rising.

When the spread is small compared to the mean (at a defined time and length scale), the parcel of air is moving fairly uniformly and can be approximated by a smooth flow represented by the mean of the distribution.

But the above explanation assumes that the parcel of air can be moved and kept in isolation from the rest of the column.

An parcel of ideal gas moving up or down the air column might be approximately follow an adiabatic expansion curve because air is a relatively poor conductor of air so the error made assuming it is adiabatic is small if the transport time is much shorter than the time for conduction to make secular changes in temperature.

It can't move towards the DALR, because the atmosphere is hydrostatically stable and there are no uplifting parcels of air (matched by downfalling parcels elsewhere, BTW, because there isn't anywhere for conserved air to actually go).

Of course, in an isolated ideal gas left long enough to come to thermodynamic equilibrium, there are no moving parcels of air and there is no work being down against the gravity fielOf course, in an isolated ideal gas left long enough to come to thermodynamic equilibrium, there are no moving parcels of air and there is no work being down against the gravity fielof air and there is no work being down against the gravity field.

Could it be that atmospheres with a DALR are only in local thermodynamic equilibrium (required so that one can discuss the temperature of a local parcel of air as it moves around) but are not in global equilibrium?

Jelbring does indicate some of it — bits such as: «An adiabatically moving air parcel has no energy loss or gain to the surroundings.

«As our air parcel expands in response to the lowering of the outside pressure, the force of its internal pressure is moving the walls of the container outwards.

The DALR is established in Earth's atmosphere by vertically moving macroscopic parcels of air driven by thermal convection between volumes and surfaces at different temperatures, temperature gradients maintained by diurnal solar forcing and continual radiative cooling.

In nature, the dry adiabatic lapse rate of air in the atmosphere is maintained because the system is differentially heated from below causing parcels of air to constantly move up and down.

The constant speed moving parcel of the ideal gas is the same solution as still air for hydrostatic equilibrium.

I do not insist on the latter — it is just what makes the greatest sense to me at this time and seems to be in general agreement with the arguments in physical climatology where it is recognized that the moving parcels of air referred to in deriving the DALR are moving because of thermally driven vertical shear.

(I'm speaking here of ordinary momentum; angular momentum is simply the sum over all parcels of air of their respective ordinary momenta when constrained to move in a circle.)

When an air parcel occasionally moves upward, its pressure changes as prescribed by the ambient conditions (e.g. of hydrostatic equilibrium).

Once it expands it pushes against the adjoining parcels so pressure increases in the horizontal plane but pressure in the vertical plane remains the same so the expanded and lighter air parcel moves in the direction of least resistance which is upward.

Again, pressure in the vertical plane stays the same so the contracted and heavier air parcel moves in the direction of least resistance which is downward.

Indeed, if a parcel of air is moved adiabatically from the surfaceto aloft, the temparature drops accordingly.