一、影响日照时间长短的因素1.昼长;2.地势(地势高,日出早,日落晚,日照时间长);3.天气状况。二、影响太阳辐射强度的因素(即影响大气对太阳辐射削弱作用的因素)1.太阳高度(即纬度);2.天气状况;3.地势;4.空气密度。如为什么青藏高原太阳辐射最强?①纬度较低,太阳高度较大;②晴天 First, the factors that affect the length of sunshine duration 1. Long length; 2. Topography (high terrain, early sunrise, late sunset, long sunshine hours); 3. Weather conditions. Second, the factors that affect the intensity of solar radiation (ie factors that affect the atmosphere’s weakening effect on solar radiation) 1. Solar altitude (ie latitude); 2. Weather conditions; 3. Terrain; 4. Air density. Such as why the solar radiation in the Qinghai-Tibet Plateau is the strongest? 1 Latitude is lower, the sun is higher in height; 2 sunny days