Hot, dry and low pressure forms over hot deserts. Known as a tropical continental air mass.
Air masses with those characteristics are termed "maritime tropical".
oceancurrent
An air mass classified as cT usually forms over hot and dry desert or semi-arid regions, such as in the southwestern United States or northern Mexico. It derives its characteristics from being a continental (c) air mass and originating from the tropics (T).
It forms over the northern Atlantic and northern Pacific oceans.
An air mass that forms over the southwestern US is typically designated as "cT" (continental tropical). This air mass is characterized by its high temperatures and dry conditions.
Continental tropical.
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).
Maritime Air Mass
A hot air mass that forms over land is called a continental air mass.
Marititime Air Masses
Air masses with those characteristics are termed "maritime tropical".
The mass that forms over the warm waters of the Atlantic Ocean is called a maritime tropical air mass. The source region for this air mass is labeled with the letter "m."
oceancurrent
Air masses that are cold and forms over polar regions is polar. A cold front occurs when a cold air mass meets and displaces a warm air mass. A front that forms when a warm air mass is trapped between cold air masses and forced to rise is called a occluded front.
An air mass classified as cT usually forms over hot and dry desert or semi-arid regions, such as in the southwestern United States or northern Mexico. It derives its characteristics from being a continental (c) air mass and originating from the tropics (T).
cT represents a continental tropical air mass, which is warm and dry in nature. This air mass typically forms over desert regions and brings hot and dry conditions when it moves to other areas.
polar air mass (meteorology), air mass that forms over land or water in the higher latitudes.