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Air mass


In meteorology, an air mass is a volume of air defined by its temperature and water vapor content. Air masses cover many hundreds or thousands of square miles, and adapt to the characteristics of th...

An air mass that forms over water at a low latitude is most likely cold or


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 ...

air mass - National Geographic Society


Mar 30, 2011 ... Tropical air masses form in low-latitude areas and are moderately warm. Polar air ... Maritime air masses form over water and are humid.

Chapter 9: Air Masses and Fronts Air Masses Source Regions


vertical). ❑ Air masses are characterized by their temperature and ... in the high or low latitudes; middle latitudes are too variable. ... Continental Polar air masses form over large, high- latitude land ... predominate due to a lack of water vapor.

Summary - Pearson


Continental (c) designates an air mass of land origin, with the air likely to be dry; whereas a maritime (m) air mass originates over water ... Tropical (T) air masses form in low latitudes and are warm. ... Continental polar (cP) and maritime tropical (mT) air masses influence the weather of North America most, especially east of ...

Air Masses and Fronts


Heating of the lower atmosphere by energy transfer from the surface. ... The longer the air mass stays over its source region, the more likely it will acquire ... polar latitudes P - located poleward of 60 degrees north and south; tropical latitudes T ...

This air mass is characterized by - Texas A&M University


The air mass is more shallow than the continental Polar air mass. ... Continental Polar air masses form over Canada and Siberia. ... air can enter the United States from the northeast when a low pressure mid- latitude ... from a source region in the Tropics and over water, this air mass is characterized by hot, humid conditions.

High School Earth Science/Changing Weather - Wikibooks, open ...


Instead, air masses move across them, making the middle latitudes the site of ... As you might expect, air masses that form over oceans contain more water .... When the temperature gradient across a cold front is low, a cold front has ... As the front passes over you, the temperature and dew point rise and the rain likely ends.

NWS JetStream - Air Masses


The longer the air mass stays over its source region, the more likely it will acquire the ... letter 'T', are warm/hot as they originate over the lower latitudes of both land and sea. ... Where air masses converge, they form boundaries called "fronts".

Ask the Experts: Your weather questions answered - USATODAY.com


A: Lightning strikes are more likely over the world's oceans due to their enormity, ... If not, how is the back portion or end of the cold air mass defined? .... In advance of a low- pressure system, the air will typically have more water vapor. ... A: Most of the precipitation in mid-latitude storms occurs along and near the cold ...

More Info

Air Masses | UCAR Center for Science Education


Air masses that form over the ocean, called maritime air masses, are more ... the temperature of the air mass, which depends on the latitude where it formed.

AIR MASS CLASSIFICATION - Weather Prediction Education


The maritime tropical air mass is most often felt in the Southeast US. ... The warm waters in this region evaporate an enormous volume of water. ... The source region for mP air is over cold ocean currents or high latitude ocean waters. ... high pressure and a trough aloft, especially when cP air moves into lower latitudes.

Fronts | Climate Education Modules for K-12


Aug 9, 2013 ... A front describes the boundary between two air masses containing different ... The air masses can have large temperature contrasts over a short ... the front, since fronts are often associated with areas of low pressure. ... are relatively warm, rain will be the likely precipitation form. ... Want to learn more?