What increases the stability of an air mass?
Cool air moving over a warm surface is heated from below, generating instability and increasing the possibility of showers. Warm air moving over a cool surface is cooled from below, increasing stability. If air is cooled to its dew point, stratus and/or fog forms.
What does the stability of an air mass depend on?
To determine the stability of an air parcel, one compares its temperature to the temperature of the surrounding air mass. If the air parcel's temperature is less than the temperature of the surrounding air mass, it is denser than the surrounding air and therefore has a tendency to sink.
What would decrease the stability of an air mass?
The stability of an air mass decreases when its lower layers become warm and sometimes humid, making the mass warmer than its environment and causing…
Which air mass is more stable?
If warm air is over cold air, this is stable. If cold air is over warm air this is unstable. For this reason, tropical air masses are usually less stable than polar air masses.
Which would increase the stability of an air mass quizlet?
Terms in this set (33) Indicates stability: stability of the atmosphere is determined by vertical movements of air. Warm air rises when the air above is cooler. Cooling from below: surrounding air is warmer, which would increase the stability of an air mass.
What affects air stability?
Three characteristics of the sounding then determine the stability of the atmospheric layer in which the parcel of air is embedded. These are: (1) The temperature lapse rate through the layer; (2) temperature of the parcel at its initial level; and (3) initial dew point of the parcel.
What causes stable air?
The atmosphere is said to be absolutely stable if the environmental lapse rate is less than the moist adiabatic lapse rate. This means that a rising air parcel will always cool at a faster rate than the environment, even after it reaches saturation.
What conditions cause a stable air mass quizlet?
Indicates stability: stability of the atmosphere is determined by vertical movements of air. Warm air rises when the air above is cooler. Cooling from below: surrounding air is warmer, which would increase the stability of an air mass.
Which would decrease the stability of an air mass quizlet?
Clouds with considerable vertical development and associated turbulence. What would decrease the stability of an air mass? Warming from below.
What is stable air mass?
Air mass having a stable stratification in its lower layer, and consequently free from convection, having a low degree of turbulence, and containing either stratiform clouds, fog, or no clouds at all.
What conditions cause a stable air mass CAX?
Due to their static nature, stable air masses are characterized by certain atmospheric conditions.
- Cloud Cover. Because stable air masses are, by nature, calm and free of violent disturbances, they are often marked by the appearance of stratiform clouds or fog. …
- Smooth Air. …
- Uninterrupted Precipitation. …
- Low Visibility.
Apr 24, 2017
What are the characteristics of a stable air mass?
2. What are the characteristics of stable air? A—Good visibility; steady precipitation; stratus clouds.
Which of the following is a characteristic of a stable air mass?
Explanation: characteristics of stable air: stratiform clouds, continuous precipitation, smooth air, poor visibility.
How is stable air formed?
If the air parcel is colder than the environment in its new position, it will have higher density and tend to sink back to its original position. In this case, the air is stable because vertical motion is resisted.
What are characteristics of a stable air mass?
2. What are the characteristics of stable air? A—Good visibility; steady precipitation; stratus clouds.