云南地处高原，紫外线强，阳光充足，阳光辐射不能使空气加热，但能使土壤加

云南地处高原，紫外线强，阳光充足，阳光辐射不能使空气加热，但能使土壤加温，白天土壤的加温和晚间冷却的程度决定了近地面层的温度。因而，综合云南地势、季风、四季阳光充足、森林等地理气候的影响，说明红土壤对太阳热能潜藏的功能存在着相对不足，红土壤夜间容易冷却，因此形成了云南特殊的“日温差大”气候特征，同时也影响年温差。

云南地处高原，紫外线强，阳光充足，阳光辐射不能使空气加热，但能使土壤加温，白天土壤的加温和晚间冷却的程度决定了近地面层的温度。 因而，综合云南地势、季风、四季阳光充足、森林等地理气候的影响，说明红土壤对太阳热能潜藏的功能存在着相对不足，红土壤夜间容易冷却，因此形成了云南特殊的“日温差大”气候特征，同时也影响年温差。

Yunnan is located on the plateau, with strong ultraviolet radiation and sunshine. The radiation of the sun can not heat the air, but it can make the soil warm. During the day, the temperature of the ground layer is determined by the temperature of the soil and the cooling of the night. Therefore, combined with the influence of geographical climate such as topography, monsoon, sunny seasons and forests in Yunnan, it is shown that the functions of lateritic soil in solar thermal energy are relatively insufficient, and the red soil is easy to cool at night, thus forming a special climate characteristic of "great difference in temperature in Yunnan", and also affecting the annual temperature difference.<br>