File:Elementary physical geography; (1908) (14804390553).jpg

Identifier: elementaryphysic01redw (find matches)
Title: Elementary physical geography;
Year: 1908 (1900s)
Authors: Redway, Jacques Wardlaw, 1849- (from old catalog)
Subjects: Physical geography
Publisher: New York, C. Scribner's sons
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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a air. Inwinter the conditions are reversed; cold air flows from theand to the sea. In other instances, a region may be swe) >tby southeast Trade Winds at one part of the year, and bythe northeast belt the remainder. The monsoons of theMexican coast are probably due to this cause. The monsoon season does not keep pace with the ap-parent motion of the sun in its oscillation north and south.Like the temperature season it is about a month slow.The changes therefore occur in April and October insteadof March and September, the dates of the equinoxes. The most remarkable monsoons, however, are those ofthe Indian coast. From April to October the southerlyhalf of the belt of Trade Winds reaches far inland, pouringa deluge of rain upon the land. During the rest of theyear the southerly part of the belt has moved southward,and the northerly half covers the coast, parching the landand withering vegetation. The tremendous updraught ofwarm air aids materially in giving strength to these winds.
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224 PHYSICAL GEOGRAPHY The breaking or change of the monsoon is usually at-tended by terrific storms. On account of its inland position, the central part of Asia is markedby great extremes of temperature. During summer its vast deserts arealmost like a furnace, and the updraught of heated air is so enormousthat it causes atmospheric disturbances two thousand miles away.In winter the dry air is chilled many degrees below that of the warmsea-air; being correspondingly heavier, it flows outward toward theocean. The winds of the Gulf Coast and the lower MississippiValley may be regarded as monsoons, but they are neitherso regular nor so strong as the Indian monsoons. Day and Night Breezes.—The difference between thetemperature of day and night is sufficient to cause stronglocal winds. Thus, along the coasts, especially in warmregions, the updraught of the land causes a stiff on-shorewind during the day; at night, the air over the land, beingmore quickly chilled, flows down the slopes to

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