Which cloud type is most common to form in unstable atmospheres?
b When heated surface air convects in a stable atmosphere, any condensation at high elevation will cause cumulus clouds. Cumulonimbus clouds can form when heated air is unstable. Cumulonimbus clouds are more likely to cause precipitation.
Which of the following conditions would lead to unstable air?
To be “unstable”, air masses below the surface must be warm and/or humid enough that, if any air is raised, that parcel of air will be warmer than its surrounding environment. Condensation releases heat which warms the air parcel and can cause it to rise even higher.
What type of clouds would you most likely expect to see in a stable atmosphere?
Clouds that are in stable conditions tend to grow horizontally. This can lead to stratus formation in stable air, such as cirrostratus and altostratus. Clouds are more likely to grow vertically in an unstable/conditionally unstable atmosphere, as the warm air parcel from the ground tends to keep rising upwards.
How can you tell if the atmosphere is stable or unstable?
If the air returns to its original location, then the atmosphere is stable. The atmosphere becomes unstable if the air rises. The figure shows that the air inside the parcel is colder and denser then the surrounding air. The parcel would then sink to the ground.
What are characteristics of stable air?
What are the characteristics for stable air? A–Still precipitation and good visibility. B–Poor visibility; steady precipitation; stratus clouds. C–Poor vision; intermittent precipitation; cumulus cloud.
What is an indicator of stable air?
Indicators that a stable atmosphere is present are steady winds, clouds with layers, poor visibility due smoke and haze near the ground, and poor visibility. You can tell if there are unstable conditions by gusty winds, dust devils, or clouds with vertical growth and good visibility. (
What conditions cause a stable air mass?
The temperature lapse rate (or ambient) determines the stability of the atmosphere. The stability of an atmosphere mass is affected by temperature lapse rates. Unstable air forced upward can cause clouds with significant vertical development and associated turbulentity.
What are characteristics of a moist unstable air mass?
A stable layer of air. 3412. What are the characteristics of a moist and unstable air mass? Showery precipitation and cumuliform clouds.
What is stable air mass?
Air mass with a stable stratification of its lower layer and therefore free from convection. It also has a low level of turbulence and contains either stratiform clouds or fog.
Which condition is present when a local parcel of air is stable?
*Which conditions are present when a local parcel is stable? Convection is not possible on the parcel of air.
What is the importance of atmospheric stability?
Atmospheric instability is a measure how the atmosphere tends to discourage or deter horizontal motion. Vertical motion is directly End. to various types of weather systems, their severity, and different types of weather.
Where would we be without the atmosphere today?
Without an atmosphere, our world would be as cold as the lifeless moon, which has an average temperature of minus 243 degrees Fahrenheit (minus 153 degrees Celsius) on its far side. Because of the greenhouse effect, Earth maintains an overall average temperature of around 59 F (15 C).
What is meant by a conditionally unstable atmosphere?
If dry air is heated, it will lose its temperature due to adiabatic contraction. The atmosphere’s lower layer is in conditional instability. When water vapor reaches saturation point it becomes unstable and cumulus and cumulonimbus are created. …
Why is the troposphere unstable?
The troposphere’s temperature decreases with altitude makes it unstable. The troposphere’s air is susceptible to convecting (to overturn) just like Page 2 2 water when heated from below. The temperature maximum near 45 km (the stratopause) marks the upper boundary of the stratosphere.
Which layer of the atmosphere is stable?
The Sun is the direct heat source of the stratosphere. Because stratosphere air is stable, it’s because the Sun heats it directly. The layer is stable because there is very little mixing. The ozone layer is found within the stratosphere between 15 to 30 km (9 to 19 miles) altitude.
What happens in the layers of the atmosphere?
1) Half of the Earth’s atmosphere is found in the troposphere, the layer that lies above the surface. This layer is where weather occurs. 2) Because the stratosphere is stable, many jet aircrafts fly there. The ozone layer also absorbs the harmful rays of the Sun.