World Maps of High Dry-Bulb and Wet-Bulb Temperatures

摘要

This report presents a series of 18 original worldwide maps showing the patterns of extremes but more particularly the frequency and duration of high dry-bulb (> or = 100F) and high wet-bulb (> or = 70F) temperatures. Methods used in drawing the isolines for each map are presented and their accuracy (where estimated) analyzed. Notes are given to assist in interpreting each map or to explain its limitation in specific areas. As expected, Saharan Africa and southwestern Asia possess a large proportion of the total world area with high dry-bulb temperature. Nearly all of the Sahara and large areas in Saudi Arabia, Iraq, West Pakistan, and India commonly experience dry-bulb temperatures between 105 and 110F. Only small areas in other parts of the world have high frequencies of such temperatures. Truly high wet-bulb temperatures, close to or above 80F, are widely spread geographically only under humid tropic conditions of climate. They are found along the Pacific coast of southern Mexico, in the Amazon Basin, the Sudan region of Africa, the Mozambique, Tanganyika and Kenya coasts of Africa, southern and southeastern Asia, the islands of the East Indies, and the north coast of Australia. (Author)