A Complete Collection of 100000 Whys
Fav十万个为什么
为什么沙漠很干燥？
1、沙漠地区大部分时间缺乏降水，年降水量极低，通常低于250毫米，这使得水分难以积累。
2、沙漠的地理位置通常远离水汽来源，如海洋，导致水汽难以到达，形成干旱气候。
3、沙漠地区的气温极高，白天地面迅速升温，水分蒸发快，而夜晚气温骤降，水分难以保留。
4、沙漠的地表多为沙质或岩石，缺乏植被覆盖，土壤保水能力差，水分容易流失。
5、沙漠地区的空气稀薄，湿度低，水分蒸发后难以形成云层，导致降水稀少。
总之，沙漠的干燥是由于降水稀少、地理位置、高温、地表特性以及空气稀薄等多重因素共同作用的结果。
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