Question

Define airmass. Describe the winter and summer airmasses of Asia.

22 Jul 2026
Answer :
Word Count : 692
An airmass is a large body of air having relatively uniform temperature, humidity, and stability characteristics over a vast horizontal area. It develops over extensive source regions where the surface conditions remain uniform for a sufficiently long period, allowing the air to acquire the physical properties of the underlying surface. The major source regions include polar regions, deserts, oceans, and tropical lands. Airmasses are classified according to their moisture content and thermal characteristics into continental (dry), maritime (moist), tropical, polar, arctic, and equatorial types. As these airmasses move away from their source regions, they undergo modification due to interaction with different landforms, water bodies, and atmospheric conditions, thereby influencing regional weather and climate. Asia, being the largest continent with extensive latitudinal and longitudinal spread, experiences remarkable seasonal contrasts in atmospheric circulation. During winter and summer, distinct airmasses develop _________ __________ ____ ______ _________ ________ ______ ______ ______ _______.
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