. Europe and other continents . WIND AND RAIN BELTS 33 trades commence on the edge of the horse latitudes, wherethe descending air is also growing warmer and evaporatingmoisture. Thus both north and south of the rainy belt ofcalms there is a belt of little rainfall. Within thesebelts are the Sahara and most of the other desertregions of the earth. Point them out in Figures 26, 27,. Fig. heavy rainfall where the prevailing westerlies blow over the rising is the condition farther east? What is the case where the tradewinds blow ? Why ? and 28. Which of our Pacific Coast States
. Europe and other continents . WIND AND RAIN BELTS 33 trades commence on the edge of the horse latitudes, wherethe descending air is also growing warmer and evaporatingmoisture. Thus both north and south of the rainy belt ofcalms there is a belt of little rainfall. Within thesebelts are the Sahara and most of the other desertregions of the earth. Point them out in Figures 26, 27,. Fig. heavy rainfall where the prevailing westerlies blow over the rising is the condition farther east? What is the case where the tradewinds blow ? Why ? and 28. Which of our Pacific Coast States is partly inthe horse latitudes ? (Fig. 30.) Although the trades are drying winds, they obtainmuch vapor when they pass over the ocean. Therefore,wherever they blow from the ocean upon the risingslopes of the land, and especially upon mountain slopes, 34 GENERAL GEOGRAPHY the moist air is cooled in rising, and abundant rain to this, the eastern or windward slopes of lands inthe trade-wind belts have abundant rainfall, while the west-ern or leeward slopes, and the level interiors of continents,have little. Notice how clearly this is shown on therainfall maps (Figs. 26 to 30). What sections in NorthAmerica are thus affected ? In the broad belts of westerly winds, where the air risesover western coasts and islands, there is heavy examples in Figures 2
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