When a big body of air remains over one area for numerous days or weeks, the body ofair may adjust its thermal and also moisture properties according to the soil or water underit. The waiting exchanges warmth with the floor or water, one of two people warming or cooling, till itstemperature closely matches that of the surface below it. The body of air likewise gains orloses moisture relying on the temperature and also moisture contents of the surface. A body ofair the resembles the features of the surface ar under it is dubbed an airmass.
Five an easy types of air masses influence Michigan\"s weather. Castle can carry anything fromscorching heat to bone-chilling cold relying on the form of air mass. The five are. Continental Arctic (cA): very cold temperatures and also verylittle moisture. These usually originate north of the Arctic Circle,where work of 24 hour darkness allow the air come cool to periodically record-breaking lowtemperatures. Such air masses regularly plunge southward throughout Canada and also the USA duringwinter, but very rarely kind during the summer since the sun warms the Arctic. Continental polar (cP): Cold and also dry, however not as cold asArctic waiting masses. This usually kind farther come the south and also oftendominate the weather snapshot across the USA throughout winter. Continental polar masses doform during the summer, however usuallyinfluence only the northern USA. This air masses room the ones responsible for bringingclear and also pleasant weather during thesummer to the North. Marine polar (mP): Cool and also moist. They usually bringcloudy, wet weather come the USA. Maritime polar wait masses form over the north Atlanticand the north Pacific oceans. They most regularly influence the Pacific Northwest and also theNortheast. Naval polar air masses can form any time the the year and are generally not ascold as continent polar waiting masses. Marine tropical (mT): warmth temperatures with copiousmoisture. Maritime tropical wait masses space most common acrossthe eastern USA and also originate over the warm waters of the southern Atlantic Ocean and also theGulf of Mexico. This airmasses can type year round, however they are many prevalent throughout the USA throughout summer.Maritime tropical wait masses areresponsible because that the hot, humid job of summer throughout the South and the East. Continent Tropical (cT): hot and very dry. Lock usuallyform over the Desert Southwest and also northern Mexico throughout summer. Castle can bring recordheat come the Plains and also the Mississippi Valley during summer, however they usually perform not makeit to the East and also the Southeast. Together they move eastward, humidity evaporates right into the air,making the waiting mass more like a marine tropical waiting mass. Continent tropical airmasses really rarely form during winter, yet they usually keep the Desert Southwestscorching above 100 degrees Fahrenheit during summer.
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