A Complete Collection of 100000 Whys
Fav十万个为什么
为什么沙漠干燥？
1、沙漠地区深居内陆，远离海洋，海洋水汽难以到达，导致降水稀少。
2、沙漠地区多盛行下沉气流，空气在下沉过程中温度升高，水汽蒸发加剧，进一步减少了降水。
3、沙漠地区地表多为沙质土壤，吸热快，升温迅速，导致空气中的水汽迅速蒸发。
4、沙漠地区植被稀疏，缺乏植被覆盖的地表更容易受到太阳辐射的直接加热，加速了水分蒸发。
5、沙漠地区昼夜温差大，白天温度高，水分蒸发快；夜晚温度低，水分蒸发减少，但整体上水分损失仍然较大。
总之，沙漠干燥是由于地理位置、气候条件、地表特征和植被覆盖等多方面因素共同作用的结果。
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