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Why does desert exist in the Southwestern US?
the western mountains block moist air from the Pacific Ocean
What is desert air like?
Air in the desert is little different from air elsewhere. In the desert the air contains little water vapor and, in some cases, may be quite hot.
Can a cyclone form over a desert?
no a cyclone can not form over the desert because in order for a cyclone to form it needs the sun to raise the temperature of the sea to the point where it evaporates and the moisture from the water to rise so since the desert sand can not evaporate from the suns heat rays and there is no moisture in the air it is not possible for a cyclone to form
What desert does most of the warm air come from in Africa?
The Sahara Desert, the largest hot desert in the world.
Is there water vapor in the air above the desert?
Desert air usually has a very low moisture content. Air above a lake would be much more humid.
Does the water vapor content of the air over a tropical desert exceed that of the air over the polar ice caps?
No, the water vapor content of the air over a tropical desert is typically lower than that over the polar ice caps. The polar regions are generally colder and have lower temperatures, causing the air to hold less water vapor compared to the warm tropical desert regions.
Why does desert exist in the Southwestern US?
the western mountains block moist air from the Pacific Ocean
How are ocean breezes formed?
Water has a very high specific heat, meaning it takes a lot of energy to heat it up compared with other substances. Because of this, bodies of water such as oceans and lakes heat up more slowly during the day than the land does. As a result the air over the ocean is cooler than that over land. Air over the land rises while air over the ocean sinks, and then moves on to land to replace the rising air at ground level.
The difference in air temperature over land compared to over water causes convection currents in the atmosphere. How would a person at the beach experience these convection currents?
A person at the beach might feel cooler air coming from the ocean during the day as the warmer air over the land rises and draws in the cooler ocean breeze. At night, the opposite may occur, with warmer air moving from the land towards the cooler ocean. This circulation of air due to temperature differences is what creates convection currents in the atmosphere.
Why does an air mass that forms over a desert have low humidity?
A desert is dry. It does not produce a lot of water vapor. An air mass that forms over a desert will have low humidity.The desert receives an extremely low amount of precipitation (rain, snow, etc. that has fallen at a place in a given period) or lack of water. This would make an air mass that forms over a desert have low humidity (The air mass would not be moist).
What air mass forms over desert?
Continental tropical.
Why does desert exist in the southwestern United states?
the western mountains block moist air from the pacific ocean
Does sound travel faster in desert or mountain air?
The speed of sound depends only on the temperature of the gas for an ideal gas. This implies that the ambient pressure on top of a mountain doesn't affect the propagation of sound in air. So the speed of sound should be larger in hot desert air compared to cold air on a mountain top.
Why does low pressure area usually originate over the ocean?
bacause air over the ocean is cooler than the air over the land ,so low preasure area usually originate over it
Can water vapor take up about 4 percent of the air over an ocean?
Over a tropical ocean, yes.
How would the density of the air over the ocean compare to the density of the air over the nearby land?
2
Does an MT air mass forms over an ocean?
no
