What conditions makes the atmosphere unstable?
Air is considered unstable, in the lowest layers of an air mass when the air is warmer and or more humid than the surrounding air. When this occurs the air will rise, as that air parcel is warmer than the air surrounding it. In an unstable environment, the weather can change suddenly and can be violent.
What do sets of conditions working together will make the atmosphere the most unstable?
What two conditions working together make the atmosphere the most unstable? Sunlight warms the ground and the air next to it during the day. This steepens the environmental lapse rate and makes the atmosphere more unstable.
What conditions would tend to make the atmosphere more or less stable?
When air stops rising because it is colder, the atmosphere is stable. When air continues to rise because it is warmer, the atmosphere is unstable. When the ELR is small, the atmosphere is stable, but when the ELR is large, the atmosphere is unstable. Heat surface: creates a bigger ELR and increases instability.
What causes instability in the atmosphere?
The warmth from the forest fire heats the air, causing instability near the surface. Warm, less-dense air (and smoke) bubbles upward, expanding and cooling as it rises. Eventually the rising air cools to its dew point, condensation begins, and a cumulus cloud forms.
Which condition below would make a layer of air more unstable?
When a layer of air is forced to rise it tends to become more unstable because the top layer cools more rapidly than the bottom. This steepens the environmental lapse rate. This effect is enhanced even more when the lower layer of the lifted parcel is moist and the upper layer is dry.
How can a conditionally unstable atmosphere become unstable?
How can a conditionally unstable atmosphere become unstable? Latent heat released by cloud formation causes an air parcel to cool.
What is stable and unstable air?
Stable air means that the weather is likely to be calm. It may rain or snow slowly and steadily it may be sunny but the weather will not change quickly. Unstable air means that the weather might change quickly with very little warning.
What is conditionally unstable?
Conditional instability is a state of instability that depends upon whether or not the rising air is saturated. Conditional stability occurs when the environmental lapse rate is between the moist and dry adiabatic rates. The atmosphere is normally in a conditionally unstable state.