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en.wikipedia.org/wiki/High-pressure_area

A high-pressure area, high or anticyclone is a region where the atmospheric pressure at the ... The strongest high-pressure areas are associated with cold air masses which push ... These Highs change character and weaken once they move further over ... The subtropical ridge also helps form most of the world's deserts.

www.nationalgeographic.org/encyclopedia/air-mass

Mar 30, 2011 ... Polar air masses take shape in high-latitude regions and are cold. Equatorial ... Continental air masses form over land and are dry. Therefore ...

scied.ucar.edu/shortcontent/air-masses

Air is not the same everywhere. In North America, for example, cold and dry air covering thousands of miles flows south from the Arctic, especially in winter, and  ...

www.shsu.edu/~dl_www/bkonline/131online/f08airmass/08mctfquiz.htm

A region dominated by cyclones is more likely to produce an air mass than a region ... it would most likely be more characteristic of a midlatitude maritime air mass than a continental air mass ... 018. Continental air masses tend to form over land and bring weather that is cool and wet ... Relatively cold and the humidity high.

www.tvcc.cc/media/documents/cbwcl/pms_425_fire_wx_ch_08.pdf

mass, or the interaction of two or more air masses. The weather ... Air within these high-pressure cells, resting or moving slowly over land or sea areas that have uniform ... Air masses that form over a source region ... High-latitude continental source regions are much ..... Heating and lifting of the air are likely to produce.

www.britannica.com/science/air-mass

air mass: In meteorology, large body of air having nearly uniform conditions ... air usually forms during the cold period of the year over extensive land areas ... high latitudes, heavy precipitation may occur when the air is forced to ascend ... the most important moisture-bearing and rain-producing air mass throughout the year.

snowball.millersville.edu/~adecaria/ESCI241/esci241_lesson15_airmasses.pdf

In order to form, and air mass must remain in its source region for a week or more . ○ Source ... Air masses formed over land are called continental air masses. ○ The five ... О Formed over the oceans at high latitudes. О cool and .... О Most warm fronts are between cP and mT air masses, or sometimes between. mP and mT ...

www.theweatherprediction.com/basic/airmass

The maritime tropical air mass is most often felt in the Southeast US. ... As the maritime tropical airmass moves over land it begins to "pick up" characteristics ... The source region for mP air is over cold ocean currents or high latitude ocean waters. ... above the dryline, severe thunderstorms can form near a dryline boundary.

www.thoughtco.com/types-of-north-american-air-masses-3443886

Aug 21, 2017 ... Learn more about these air mass types and where they come from (source regions). ... Depending on whether an air mass forms over an ocean or a land surface it is ... Maritime polar air forms over oceans at high latitudes.